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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#545554 | #833. Cells Blocking | N_z_ | AC ✓ | 235ms | 118272kb | C++14 | 6.8kb | 2024-09-03 14:56:28 | 2024-09-03 14:56:29 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
struct time_helper
{
#ifdef LOCAL
clock_t time_last;
#endif
time_helper()
{
#ifdef LOCAL
time_last=clock();
#endif
}
void test()
{
#ifdef LOCAL
auto time_now=clock();
std::cerr<<"time:"<<1.*(time_now-time_last)/CLOCKS_PER_SEC<<";all_time:"<<1.*time_now/CLOCKS_PER_SEC<<std::endl;
time_last=time_now;
#endif
}
~time_helper()
{
test();
}
}time_helper;
#ifdef LOCAL
#include"dbg.h"
#else
#define dbg(...) (__VA_ARGS__)
#endif
namespace Fread{const int SIZE=1<<16;char buf[SIZE],*S,*T;inline char getchar(){if(S==T){T=(S=buf)+fread(buf,1,SIZE,stdin);if(S==T)return'\n';}return *S++;}}namespace Fwrite{const int SIZE=1<<16;char buf[SIZE],*S=buf,*T=buf+SIZE;inline void flush(){fwrite(buf,1,S-buf,stdout);S=buf;}inline void putchar(char c){*S++=c;if(S==T)flush();}struct NTR{~NTR(){flush();}}ztr;}
#define getchar Fread::getchar
#define putchar Fwrite::putchar
#define Setprecision 10
#define between ' '
#define __int128 long long
template<typename T>struct is_char{static constexpr bool value=(std::is_same<T,char>::value||std::is_same<T,signed char>::value||std::is_same<T,unsigned char>::value);};template<typename T>struct is_integral_ex{static constexpr bool value=(std::is_integral<T>::value||std::is_same<T,__int128>::value)&&!is_char<T>::value;};template<typename T>struct is_floating_point_ex{static constexpr bool value=std::is_floating_point<T>::value||std::is_same<T,__float128>::value;};namespace Fastio{struct Reader{template<typename T>typename std::enable_if_t<std::is_class<T>::value,Reader&>operator>>(T&x){for(auto &y:x)*this>>y;return *this;}template<typename T>typename std::enable_if_t<is_integral_ex<T>::value,Reader&>operator>>(T&x){char c=getchar();short f=1;while(c<'0'||c>'9'){if(c=='-')f*=-1;c=getchar();}x=0;while(c>='0'&&c<='9'){x=(x<<1)+(x<<3)+(c^48);c=getchar();}x*=f;return *this;}template<typename T>typename std::enable_if_t<is_floating_point_ex<T>::value,Reader&>operator>>(T&x){char c=getchar();short f=1,s=0;x=0;T t=0;while((c<'0'||c>'9')&&c!='.'){if(c=='-')f*=-1;c=getchar();}while(c>='0'&&c<='9'&&c!='.')x=x*10+(c^48),c=getchar();if(c=='.')c=getchar();else return x*=f,*this;while(c>='0'&&c<='9')t=t*10+(c^48),s++,c=getchar();while(s--)t/=10.0;x=(x+t)*f;return*this;}template<typename T>typename std::enable_if_t<is_char<T>::value,Reader&>operator>>(T&c){c=getchar();while(c=='\n'||c==' '||c=='\r')c=getchar();return *this;}Reader&operator>>(char*str){int len=0;char c=getchar();while(c=='\n'||c==' '||c=='\r')c=getchar();while(c!='\n'&&c!=' '&&c!='\r')str[len++]=c,c=getchar();str[len]='\0';return*this;}Reader&operator>>(std::string&str){str.clear();char c=getchar();while(c=='\n'||c==' '||c=='\r')c=getchar();while(c!='\n'&&c!=' '&&c!='\r')str.push_back(c),c=getchar();return*this;}Reader(){}}cin;const char endl='\n';struct Writer{typedef __int128 mxdouble;template<typename T>typename std::enable_if_t<std::is_class<T>::value,Writer&>operator<<(T x){for(auto &y:x)*this<<y<<between;*this<<'\n';return *this;}template<typename T>typename std::enable_if_t<is_integral_ex<T>::value,Writer&>operator<<(T x){if(x==0)return putchar('0'),*this;if(x<0)putchar('-'),x=-x;static int sta[45];int top=0;while(x)sta[++top]=x%10,x/=10;while(top)putchar(sta[top]+'0'),--top;return*this;}template<typename T>typename std::enable_if_t<is_floating_point_ex<T>::value,Writer&>operator<<(T x){if(x<0)putchar('-'),x=-x;x+=pow(10,-Setprecision)/2;mxdouble _=x;x-=(T)_;static int sta[45];int top=0;while(_)sta[++top]=_%10,_/=10;if(!top)putchar('0');while(top)putchar(sta[top]+'0'),--top;putchar('.');for(int i=0;i<Setprecision;i++)x*=10;_=x;while(_)sta[++top]=_%10,_/=10;for(int i=0;i<Setprecision-top;i++)putchar('0');while(top)putchar(sta[top]+'0'),--top;return*this;}template<typename T>typename std::enable_if_t<is_char<T>::value,Writer&>operator<<(T c){putchar(c);return*this;}Writer&operator<<(char*str){int cur=0;while(str[cur])putchar(str[cur++]);return *this;}Writer&operator<<(const char*str){int cur=0;while(str[cur])putchar(str[cur++]);return*this;}Writer&operator<<(std::string str){int st=0,ed=str.size();while(st<ed)putchar(str[st++]);return*this;}Writer(){}}cout;}
#define cin Fastio::cin
#define cout Fastio::cout
#define endl Fastio::endl
template<class Fun>class y_combinator_result{Fun fun_;public:template<class T>explicit y_combinator_result(T &&fun): fun_(std::forward<T>(fun)) {}template<class ...Args>decltype(auto) operator()(Args &&...args){return fun_(std::ref(*this), std::forward<Args>(args)...);}};template<class Fun>decltype(auto) y_combinator(Fun &&fun){return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun));}
void solve();
main()
{
int t=1;
// cin>>t;
while(t--)solve();
}
void solve()
{
int n,m;
cin>>n>>m;
vector<vector<char>>mp(n+1,vector<char>(m+1));
int c=0;
for(int x=1;x<=n;x++)
for(int y=1;y<=m;y++)
cin>>mp[x][y],c+=mp[x][y]=='.';
vector<vector<int>>reachable(n+1,vector<int>(m+1));
vector<vector<int>>ir(n+1,vector<int>(m+1));
auto get_path=[&]()
{
vector<pair<int,int>>path1,path2;
for(int x=n;x>=1;x--)
for(int y=m;y>=1;y--)
{
if(mp[x][y]=='*')reachable[x][y]=0;
else if(x==n&&y==m)reachable[x][y]=1;
else if(x==n)reachable[x][y]=reachable[x][y+1];
else if(y==m)reachable[x][y]=reachable[x+1][y];
else reachable[x][y]=reachable[x+1][y]||reachable[x][y+1];
}
if(!reachable[1][1])return make_pair(path1,path2);
for(int x=1;x<=n;x++)
for(int y=1;y<=m;y++)
{
if(mp[x][y]=='*')ir[x][y]=0;
else if(x==1&&y==1)ir[x][y]=1;
else if(x==1)ir[x][y]=ir[x][y-1];
else if(y==1)ir[x][y]=ir[x-1][y];
else ir[x][y]=ir[x-1][y]||ir[x][y-1];
}
int u=1,v=1;
while(u!=n||v!=m)
{
path1.emplace_back(u,v);
if(v!=m&&reachable[u][v+1])v++;
else u++;
}
path1.emplace_back(u,v);
u=1,v=1;
while(u!=n||v!=m)
{
path2.emplace_back(u,v);
if(u!=n&&reachable[u+1][v])u++;
else v++;
}
path2.emplace_back(u,v);
return make_pair(path1,path2);
};
auto [path1,path2]=get_path();
if(path1.empty()){cout<<1ll*c*(c-1)/2<<endl;return;}
vector<vector<int>>vis(n+1,vector<int>(m+1));
int ans1=0,ans2=0;
for(int x=0;x<path1.size();x++)
if(path1[x]==path2[x])vis[path1[x].first][path1[x].second]=1,ans1++,ans2+=c-ans1;
for(int x=0;x<path1.size();x++)
if(!vis[path1[x].first][path1[x].second])
{
int u=path1[x].first,v=path1[x].second;
u++,v--;
while(!ir[u][v]||!reachable[u][v])u++,v--;
int k=x;
while(u!=n||v!=m)
{
if(make_pair(u,v)==path2[k]&&!vis[u][v])ans2++;
k++;
if(v!=m&&reachable[u][v+1])v++;
else u++;
}
u=path1[x].first,v=path1[x].second;
u++,v--;
while(!ir[u][v]||!reachable[u][v])u++,v--;
k=x;
while(u!=1||v!=1)
{
k--;
if(u!=1&&ir[u-1][v])u--;
else v--;
if(make_pair(u,v)==path2[k]&&!vis[u][v])ans2++;
}
}
cout<<ans2<<endl;
}
/*
*/
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3780kb
input:
3 3 ... ... ...
output:
17
result:
ok 1 number(s): "17"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
3 3 .** .*. ...
output:
15
result:
ok 1 number(s): "15"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
3 4 **** .... ****
output:
6
result:
ok 1 number(s): "6"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
5 5 *.... .*.*. ***** *.*** ..*..
output:
66
result:
ok 1 number(s): "66"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
10 10 ...***.*.. **...*.*** ...***.*.. .**...*.*. .*****..*. ..*.****.* .**...**** ..*..*.*.* *.*.**.... ....**...*
output:
1378
result:
ok 1 number(s): "1378"
Test #6:
score: 0
Accepted
time: 83ms
memory: 118080kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17999999
result:
ok 1 number(s): "17999999"
Test #7:
score: 0
Accepted
time: 83ms
memory: 118204kb
input:
3000 3000 ...................................................................................................................*......................................................................................................................................................................*..........
output:
17981671
result:
ok 1 number(s): "17981671"
Test #8:
score: 0
Accepted
time: 93ms
memory: 118128kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17963615
result:
ok 1 number(s): "17963615"
Test #9:
score: 0
Accepted
time: 143ms
memory: 118136kb
input:
3000 3000 .........................................................................................................*...........................................................................................................................................................................................
output:
17945165
result:
ok 1 number(s): "17945165"
Test #10:
score: 0
Accepted
time: 164ms
memory: 118148kb
input:
3000 3000 ......................................................................................................................................*........................................................................................................................................*.....................
output:
17928211
result:
ok 1 number(s): "17928211"
Test #11:
score: 0
Accepted
time: 161ms
memory: 118208kb
input:
3000 3000 ...........................................*.........................................................................................................................................................................................................................................................
output:
17911522
result:
ok 1 number(s): "17911522"
Test #12:
score: 0
Accepted
time: 174ms
memory: 118212kb
input:
3000 3000 ..............................*................................................................................................................*.....................................................................................................................................................
output:
17892283
result:
ok 1 number(s): "17892283"
Test #13:
score: 0
Accepted
time: 158ms
memory: 118056kb
input:
3000 3000 ................................................................*....*................................................................................................................................................................................*..............................................
output:
17873837
result:
ok 1 number(s): "17873837"
Test #14:
score: 0
Accepted
time: 162ms
memory: 118144kb
input:
3000 3000 ............................................................................................*.............................................................................*.....................................................................................................*....................
output:
17856701
result:
ok 1 number(s): "17856701"
Test #15:
score: 0
Accepted
time: 169ms
memory: 118180kb
input:
3000 3000 ......................................*..........................................................................................................................................................*...................................................................................................
output:
17837857
result:
ok 1 number(s): "17837857"
Test #16:
score: 0
Accepted
time: 164ms
memory: 118204kb
input:
3000 3000 .................................................................................................................................................................................................................................*...................................................................
output:
17819731
result:
ok 1 number(s): "17819731"
Test #17:
score: 0
Accepted
time: 196ms
memory: 118132kb
input:
3000 3000 ......**.....*.......*.*..........*..*...............**.............*.......*......*........*...*.....*.*.................*......*....*.........*....................*.................*.......................*.......*..*.*.......*.......................*..........*..*......................*...
output:
16202000
result:
ok 1 number(s): "16202000"
Test #18:
score: 0
Accepted
time: 235ms
memory: 118272kb
input:
3000 3000 ..................*....*....*...*.*.............*.............*....*.*..*...*...*...*....*.................*...*.*.***...*....*......*.......**...*.......*.*...**...*...*...**.........*..........*.....*.*....*..*.......*.........*..*.....*...............**.......*.....*.*..*.*.*........*.....
output:
21600132
result:
ok 1 number(s): "21600132"
Test #19:
score: 0
Accepted
time: 58ms
memory: 82832kb
input:
3000 3000 ..*.**...*...............*........*.*..*.*.....*........*.*..........***..*..*..*..*.*....*...*.*.....***.*...*........*..*.****..*.*....**.......*......*....*..*......*......*..*..*.*..*....*..**.*.......**.*...*....**.....**..*......*...*....*..*.**.*..***...*.....*....***.*........*.......
output:
19862779430431
result:
ok 1 number(s): "19862779430431"
Test #20:
score: 0
Accepted
time: 64ms
memory: 82748kb
input:
3000 3000 .**.**..***....*.*....*..*...*.**.**.**.......*...*........*.**.*...*...**..*...*.*.**.*.*.*.*..*...*.....*.*.**.*.*....*.**.....*..**.**.*....**.**.**..*..**...*...***.**.*.*......**.**.*...****.....***.*..*.**.*......*..**.**.**.....**...*.*..***.******...**....****..***..**.*........*.....
output:
14601805246666
result:
ok 1 number(s): "14601805246666"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3520kb
input:
1 1 *
output:
0
result:
ok 1 number(s): "0"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3516kb
input:
1 1 .
output:
0
result:
ok 1 number(s): "0"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
2 2 .. ..
output:
6
result:
ok 1 number(s): "6"
Test #24:
score: 0
Accepted
time: 66ms
memory: 82708kb
input:
3000 3000 .***..**..*.*.*..*...**.*.**...***.....*..***.***.***.*..***.*......*.**.***.***.*...**.*.*..***.*..*.**..***.....*.*...***.*.***.*...*.*.....***.*..**...*.*..*.******.*.*...**.*..**.**.**.*.**..***.**.***..*......**.***.**.*....*..*.....*...*..*.*..*..*.*...**.**...*..**..***.**..*....*.....
output:
10151159625145
result:
ok 1 number(s): "10151159625145"
Test #25:
score: 0
Accepted
time: 31ms
memory: 82680kb
input:
3000 3000 *******************************************************************************************************************************************************************************************************************************************************.******************************************...
output:
39716328
result:
ok 1 number(s): "39716328"
Test #26:
score: 0
Accepted
time: 95ms
memory: 118244kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
35988321
result:
ok 1 number(s): "35988321"
Test #27:
score: 0
Accepted
time: 79ms
memory: 118260kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35981866
result:
ok 1 number(s): "35981866"
Test #28:
score: 0
Accepted
time: 98ms
memory: 118208kb
input:
3000 3000 ...**................................................................................................................................................................................................................................................................................................
output:
17988153
result:
ok 1 number(s): "17988153"
Test #29:
score: 0
Accepted
time: 87ms
memory: 118064kb
input:
3000 3000 ...*.*...............................................................................................................................................................................................................................................................................................
output:
35969654
result:
ok 1 number(s): "35969654"
Test #30:
score: 0
Accepted
time: 83ms
memory: 118176kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
17982216
result:
ok 1 number(s): "17982216"
Test #31:
score: 0
Accepted
time: 91ms
memory: 118120kb
input:
3000 3000 ....**.*.............................................................................................................................................................................................................................................................................................
output:
71916090
result:
ok 1 number(s): "71916090"
Test #32:
score: 0
Accepted
time: 89ms
memory: 118136kb
input:
3000 3000 ....****.............................................................................................................................................................................................................................................................................................
output:
71903186
result:
ok 1 number(s): "71903186"
Test #33:
score: 0
Accepted
time: 87ms
memory: 118204kb
input:
3000 3000 .........*...........................................................................................................................................................................................................................................................................................
output:
17973051
result:
ok 1 number(s): "17973051"
Test #34:
score: 0
Accepted
time: 105ms
memory: 117996kb
input:
3000 3000 .*.......*.............................................................................................................*................................................................................*............................................................................................
output:
35630636
result:
ok 1 number(s): "35630636"
Test #35:
score: 0
Accepted
time: 95ms
memory: 118052kb
input:
3000 3000 .**...........................*..........................................................................................................................................*...........................................................................................................................
output:
44529907
result:
ok 1 number(s): "44529907"
Test #36:
score: 0
Accepted
time: 96ms
memory: 118176kb
input:
3000 3000 ....*................................................................................................................................................................................................................................................................................................
output:
53426863
result:
ok 1 number(s): "53426863"
Test #37:
score: 0
Accepted
time: 92ms
memory: 118156kb
input:
3000 3000 ..*.*........................................................................*............................*...............*.............................................................................................................................................*........*...................
output:
53419301
result:
ok 1 number(s): "53419301"
Test #38:
score: 0
Accepted
time: 92ms
memory: 118128kb
input:
3000 3000 ......*.........*...................................................................................*.....................................................................................................................*................................................*.........................
output:
26705269
result:
ok 1 number(s): "26705269"
Test #39:
score: 0
Accepted
time: 100ms
memory: 118052kb
input:
3000 3000 ....*.**....*................*............................*..........*...............................................................................................................................................................................................................................
output:
17799069
result:
ok 1 number(s): "17799069"
Test #40:
score: 0
Accepted
time: 94ms
memory: 118208kb
input:
3000 3000 ...***.......................................*...........*.....................*........*...........................................................................................................................................................*................................................
output:
53393629
result:
ok 1 number(s): "53393629"
Test #41:
score: 0
Accepted
time: 73ms
memory: 118180kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
98852811
result:
ok 1 number(s): "98852811"
Test #42:
score: 0
Accepted
time: 1ms
memory: 3864kb
input:
1 3000 ........................................................................................................................................................................................................................................................................................................
output:
4498500
result:
ok 1 number(s): "4498500"
Test #43:
score: 0
Accepted
time: 92ms
memory: 118136kb
input:
3000 3000 .*.....*...........................................................................................................*...................................*........................................................................................*............*.......................................
output:
88979547
result:
ok 1 number(s): "88979547"
Test #44:
score: 0
Accepted
time: 91ms
memory: 118212kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35964327
result:
ok 1 number(s): "35964327"