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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 |
---|---|---|---|---|---|---|---|---|---|
#611298 | #833. Cells Blocking | swt2009 | AC ✓ | 367ms | 272156kb | C++14 | 3.1kb | 2024-10-04 20:15:17 | 2024-10-04 20:15:17 |
Judging History
answer
//#pragma GCC optimize(3,"Ofast","inline")
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define mkp make_pair
#define fi first
#define se second
#define pb push_back
#define lowbit(x) ((x)&(-x))
#define lc(p) ((p)<<1)
#define rc(p) ((p)<<1|1)
#define sqr(x) ((x)*(x))
// #define mod 1000000007
// #define mod 998244353
#define eps 1e-10
#define debug cout<<__LINE__<<" "<<__FUNCTION__<<"\n";
#define spa putchar(' ')
#define ero putchar('\n')
mt19937 rnd(time(0));
constexpr int N=1e6+10,inf=1e18;
inline int read(){
int x=0,f=1;char ch=getchar();
while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
while (ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}
return x*f;
}
inline void write(int x){
if(!x)putchar('0');
if(x<0)x=-x,putchar('-');
int cnt=0,a[30];
while(x)a[++cnt]=x%10,x/=10;
while(cnt--)putchar(a[cnt+1]+'0');
}
int f[3030][3030];
int g[3030][3030];
char s[3030][3030];
vector<int>tmp[N];
int calc(int x){
return x*(x-1)/2;
}
signed main(){
// freopen(".in","r",stdin);
// freopen(".out","w",stdout);
// ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
int n=read(),m=read();
for(int i=1;i<=n;i++){
scanf("%s",s[i]+1);
}
int cnt=0;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
cnt+=(s[i][j]=='.');
}
}
if(s[n][m]=='*'||s[1][1]=='*'){
write(calc(cnt));
return 0;
}
// f->zheng g->fan
f[1][1]=1;
g[n][m]=1;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(s[i][j]=='.'){
f[i][j]|=f[i][j-1]|f[i-1][j];
}
}
}
for(int i=n;i;i--){
for(int j=m;j;j--){
if(s[i][j]=='.'){
g[i][j]|=g[i+1][j]|g[i][j+1];
}
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
g[i][j]&=f[i][j];
if(g[i][j]){
tmp[i+j].push_back(i);
}
}
}
if(!g[n][m]||!g[1][1]){
write(calc(cnt));
return 0;
}
int ans=0;
for(int i=2;i<=n+m;i++){
if(tmp[i].size()==1){
ans+=--cnt;
continue ;
}
int res1=tmp[i][1];
int res2=i-res1;
int res3=tmp[i][tmp[i].size()-1];
int res4=i-res3;
if(res1==res3){
ans++;
}
for(int j=i+1;j<=n+m;j++){
if(res3<n&&g[res3+1][res4]){
res3++;
}
else{
res4++;
}
if(res2<m&&g[res1][res2+1]){
res2++;
}
else{
res1++;
}
if(res3==res1&&tmp[j].size()>1){
ans++;
}
}
res1=tmp[i][0];
res2=i-res1;
res3=tmp[i][tmp[i].size()-2];
res4=i-res3;
for(int j=i+1;j<=n+m;j++){
if(res3<n&&g[res3+1][res4]){
res3++;
}
else{
res4++;
}
if(res2<m&&g[res1][res2+1]){
res2++;
}
else{
res1++;
}
if(res3==res1&&tmp[j].size()>1){
ans++;
}
}
}
write(ans);
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 31728kb
input:
3 3 ... ... ...
output:
17
result:
ok 1 number(s): "17"
Test #2:
score: 0
Accepted
time: 0ms
memory: 27364kb
input:
3 3 .** .*. ...
output:
15
result:
ok 1 number(s): "15"
Test #3:
score: 0
Accepted
time: 3ms
memory: 29124kb
input:
3 4 **** .... ****
output:
6
result:
ok 1 number(s): "6"
Test #4:
score: 0
Accepted
time: 0ms
memory: 27352kb
input:
5 5 *.... .*.*. ***** *.*** ..*..
output:
66
result:
ok 1 number(s): "66"
Test #5:
score: 0
Accepted
time: 7ms
memory: 27284kb
input:
10 10 ...***.*.. **...*.*** ...***.*.. .**...*.*. .*****..*. ..*.****.* .**...**** ..*..*.*.* *.*.**.... ....**...*
output:
1378
result:
ok 1 number(s): "1378"
Test #6:
score: 0
Accepted
time: 163ms
memory: 270240kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17999999
result:
ok 1 number(s): "17999999"
Test #7:
score: 0
Accepted
time: 213ms
memory: 271356kb
input:
3000 3000 ...................................................................................................................*......................................................................................................................................................................*..........
output:
17981671
result:
ok 1 number(s): "17981671"
Test #8:
score: 0
Accepted
time: 226ms
memory: 270808kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17963615
result:
ok 1 number(s): "17963615"
Test #9:
score: 0
Accepted
time: 269ms
memory: 270680kb
input:
3000 3000 .........................................................................................................*...........................................................................................................................................................................................
output:
17945165
result:
ok 1 number(s): "17945165"
Test #10:
score: 0
Accepted
time: 315ms
memory: 270464kb
input:
3000 3000 ......................................................................................................................................*........................................................................................................................................*.....................
output:
17928211
result:
ok 1 number(s): "17928211"
Test #11:
score: 0
Accepted
time: 287ms
memory: 270084kb
input:
3000 3000 ...........................................*.........................................................................................................................................................................................................................................................
output:
17911522
result:
ok 1 number(s): "17911522"
Test #12:
score: 0
Accepted
time: 286ms
memory: 270156kb
input:
3000 3000 ..............................*................................................................................................................*.....................................................................................................................................................
output:
17892283
result:
ok 1 number(s): "17892283"
Test #13:
score: 0
Accepted
time: 293ms
memory: 269724kb
input:
3000 3000 ................................................................*....*................................................................................................................................................................................*..............................................
output:
17873837
result:
ok 1 number(s): "17873837"
Test #14:
score: 0
Accepted
time: 303ms
memory: 269208kb
input:
3000 3000 ............................................................................................*.............................................................................*.....................................................................................................*....................
output:
17856701
result:
ok 1 number(s): "17856701"
Test #15:
score: 0
Accepted
time: 311ms
memory: 269220kb
input:
3000 3000 ......................................*..........................................................................................................................................................*...................................................................................................
output:
17837857
result:
ok 1 number(s): "17837857"
Test #16:
score: 0
Accepted
time: 300ms
memory: 268248kb
input:
3000 3000 .................................................................................................................................................................................................................................*...................................................................
output:
17819731
result:
ok 1 number(s): "17819731"
Test #17:
score: 0
Accepted
time: 320ms
memory: 240612kb
input:
3000 3000 ......**.....*.......*.*..........*..*...............**.............*.......*......*........*...*.....*.*.................*......*....*.........*....................*.................*.......................*.......*..*.*.......*.......................*..........*..*......................*...
output:
16202000
result:
ok 1 number(s): "16202000"
Test #18:
score: 0
Accepted
time: 367ms
memory: 210052kb
input:
3000 3000 ..................*....*....*...*.*.............*.............*....*.*..*...*...*...*....*.................*...*.*.***...*....*......*.......**...*.......*.*...**...*...*...**.........*..........*.....*.*....*..*.......*.........*..*.....*...............**.......*.....*.*..*.*.*........*.....
output:
21600132
result:
ok 1 number(s): "21600132"
Test #19:
score: 0
Accepted
time: 108ms
memory: 178812kb
input:
3000 3000 ..*.**...*...............*........*.*..*.*.....*........*.*..........***..*..*..*..*.*....*...*.*.....***.*...*........*..*.****..*.*....**.......*......*....*..*......*......*..*..*.*..*....*..**.*.......**.*...*....**.....**..*......*...*....*..*.**.*..***...*.....*....***.*........*.......
output:
19862779430431
result:
ok 1 number(s): "19862779430431"
Test #20:
score: 0
Accepted
time: 91ms
memory: 179004kb
input:
3000 3000 .**.**..***....*.*....*..*...*.**.**.**.......*...*........*.**.*...*...**..*...*.*.**.*.*.*.*..*...*.....*.*.**.*.*....*.**.....*..**.**.*....**.**.**..*..**...*...***.**.*.*......**.**.*...****.....***.*..*.**.*......*..**.**.**.....**...*.*..***.******...**....****..***..**.*........*.....
output:
14601805246666
result:
ok 1 number(s): "14601805246666"
Test #21:
score: 0
Accepted
time: 0ms
memory: 27744kb
input:
1 1 *
output:
0
result:
ok 1 number(s): "0"
Test #22:
score: 0
Accepted
time: 3ms
memory: 32148kb
input:
1 1 .
output:
0
result:
ok 1 number(s): "0"
Test #23:
score: 0
Accepted
time: 0ms
memory: 33164kb
input:
2 2 .. ..
output:
6
result:
ok 1 number(s): "6"
Test #24:
score: 0
Accepted
time: 28ms
memory: 37916kb
input:
3000 3000 .***..**..*.*.*..*...**.*.**...***.....*..***.***.***.*..***.*......*.**.***.***.*...**.*.*..***.*..*.**..***.....*.*...***.*.***.*...*.*.....***.*..**...*.*..*.******.*.*...**.*..**.**.**.*.**..***.**.***..*......**.***.**.*....*..*.....*...*..*.*..*..*.*...**.**...*..**..***.**..*....*.....
output:
10151159625145
result:
ok 1 number(s): "10151159625145"
Test #25:
score: 0
Accepted
time: 28ms
memory: 37436kb
input:
3000 3000 *******************************************************************************************************************************************************************************************************************************************************.******************************************...
output:
39716328
result:
ok 1 number(s): "39716328"
Test #26:
score: 0
Accepted
time: 179ms
memory: 272080kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
35988321
result:
ok 1 number(s): "35988321"
Test #27:
score: 0
Accepted
time: 188ms
memory: 271700kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35981866
result:
ok 1 number(s): "35981866"
Test #28:
score: 0
Accepted
time: 206ms
memory: 271660kb
input:
3000 3000 ...**................................................................................................................................................................................................................................................................................................
output:
17988153
result:
ok 1 number(s): "17988153"
Test #29:
score: 0
Accepted
time: 220ms
memory: 272052kb
input:
3000 3000 ...*.*...............................................................................................................................................................................................................................................................................................
output:
35969654
result:
ok 1 number(s): "35969654"
Test #30:
score: 0
Accepted
time: 192ms
memory: 272156kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
17982216
result:
ok 1 number(s): "17982216"
Test #31:
score: 0
Accepted
time: 184ms
memory: 270536kb
input:
3000 3000 ....**.*.............................................................................................................................................................................................................................................................................................
output:
71916090
result:
ok 1 number(s): "71916090"
Test #32:
score: 0
Accepted
time: 160ms
memory: 270732kb
input:
3000 3000 ....****.............................................................................................................................................................................................................................................................................................
output:
71903186
result:
ok 1 number(s): "71903186"
Test #33:
score: 0
Accepted
time: 176ms
memory: 271476kb
input:
3000 3000 .........*...........................................................................................................................................................................................................................................................................................
output:
17973051
result:
ok 1 number(s): "17973051"
Test #34:
score: 0
Accepted
time: 191ms
memory: 269560kb
input:
3000 3000 .*.......*.............................................................................................................*................................................................................*............................................................................................
output:
35630636
result:
ok 1 number(s): "35630636"
Test #35:
score: 0
Accepted
time: 166ms
memory: 269664kb
input:
3000 3000 .**...........................*..........................................................................................................................................*...........................................................................................................................
output:
44529907
result:
ok 1 number(s): "44529907"
Test #36:
score: 0
Accepted
time: 178ms
memory: 269572kb
input:
3000 3000 ....*................................................................................................................................................................................................................................................................................................
output:
53426863
result:
ok 1 number(s): "53426863"
Test #37:
score: 0
Accepted
time: 212ms
memory: 269600kb
input:
3000 3000 ..*.*........................................................................*............................*...............*.............................................................................................................................................*........*...................
output:
53419301
result:
ok 1 number(s): "53419301"
Test #38:
score: 0
Accepted
time: 216ms
memory: 269108kb
input:
3000 3000 ......*.........*...................................................................................*.....................................................................................................................*................................................*.........................
output:
26705269
result:
ok 1 number(s): "26705269"
Test #39:
score: 0
Accepted
time: 184ms
memory: 269420kb
input:
3000 3000 ....*.**....*................*............................*..........*...............................................................................................................................................................................................................................
output:
17799069
result:
ok 1 number(s): "17799069"
Test #40:
score: 0
Accepted
time: 179ms
memory: 269676kb
input:
3000 3000 ...***.......................................*...........*.....................*........*...........................................................................................................................................................*................................................
output:
53393629
result:
ok 1 number(s): "53393629"
Test #41:
score: 0
Accepted
time: 196ms
memory: 271880kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
98852811
result:
ok 1 number(s): "98852811"
Test #42:
score: 0
Accepted
time: 3ms
memory: 32316kb
input:
1 3000 ........................................................................................................................................................................................................................................................................................................
output:
4498500
result:
ok 1 number(s): "4498500"
Test #43:
score: 0
Accepted
time: 200ms
memory: 269480kb
input:
3000 3000 .*.....*...........................................................................................................*...................................*........................................................................................*............*.......................................
output:
88979547
result:
ok 1 number(s): "88979547"
Test #44:
score: 0
Accepted
time: 183ms
memory: 271732kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35964327
result:
ok 1 number(s): "35964327"