QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#64475 | #833. Cells Blocking | eyiigjkn | AC ✓ | 521ms | 140960kb | C++14 | 1.5kb | 2022-11-24 21:15:24 | 2022-11-24 21:15:26 |
Judging History
answer
# include <bits/stdc++.h>
using namespace std;
using ll=long long;
bool a[3010][3010],f[3010][3010],g[3010][3010],c1[3010][3010],c2[3010][3010];
char str[3010];
vector<pair<int,int>> A,B,vec[6010];
template<typename T>
inline void clear(T &x){T().swap(x);}
int main()
{
int n,m,cnt=0;
cin>>n>>m;
for(int i=1;i<=n;i++)
{
scanf("%s",str+1);
for(int j=1;j<=m;j++) cnt+=(a[i][j]=(str[j]=='.'));
}
f[1][1]=a[1][1];
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
if(a[i][j])
f[i][j]|=f[i-1][j]|f[i][j-1];
g[n][m]=a[n][m];
for(int i=n;i;i--)
for(int j=m;j;j--)
if(a[i][j])
g[i][j]|=g[i+1][j]|g[i][j+1];
if(!g[1][1]) return cout<<(ll)cnt*(cnt-1)/2<<endl,0;
ll ans=0;
A.reserve(n+m-1);B.reserve(n+m-1);
for(int i=1,j=1;;(g[i][j+1]?j:i)++)
{
A.emplace_back(i,j);c1[i][j]=1;
if(i==n && j==m) break;
}
for(int i=1,j=1;;(g[i+1][j]?i:j)++)
{
B.emplace_back(i,j);c2[i][j]=1;
if(i==n && j==m) break;
}
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
if(f[i][j] && g[i][j])
vec[i+j].emplace_back(i,j);
for(auto &p:A)
{
int x=p.first,y=p.second;
if(c2[x][y]) ans+=--cnt;
else
{
int x2=vec[x+y][1].first,y2=vec[x+y][1].second;
for(int i=x2,j=y2;;(f[i-1][j]?i:j)--)
{
ans+=(!c1[i][j] && c2[i][j]);
if(i==1 && j==1) break;
}
(g[x2][y2+1]?y2:x2)++;
for(int i=x2,j=y2;;(g[i][j+1]?j:i)++)
{
ans+=(!c1[i][j] && c2[i][j]);
if(i==n && j==m) break;
}
}
}
cout<<ans<<endl;
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 5ms
memory: 11744kb
input:
3 3 ... ... ...
output:
17
result:
ok 1 number(s): "17"
Test #2:
score: 0
Accepted
time: 4ms
memory: 13540kb
input:
3 3 .** .*. ...
output:
15
result:
ok 1 number(s): "15"
Test #3:
score: 0
Accepted
time: 0ms
memory: 9720kb
input:
3 4 **** .... ****
output:
6
result:
ok 1 number(s): "6"
Test #4:
score: 0
Accepted
time: 3ms
memory: 9696kb
input:
5 5 *.... .*.*. ***** *.*** ..*..
output:
66
result:
ok 1 number(s): "66"
Test #5:
score: 0
Accepted
time: 3ms
memory: 9528kb
input:
10 10 ...***.*.. **...*.*** ...***.*.. .**...*.*. .*****..*. ..*.****.* .**...**** ..*..*.*.* *.*.**.... ....**...*
output:
1378
result:
ok 1 number(s): "1378"
Test #6:
score: 0
Accepted
time: 350ms
memory: 140244kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17999999
result:
ok 1 number(s): "17999999"
Test #7:
score: 0
Accepted
time: 386ms
memory: 140316kb
input:
3000 3000 ...................................................................................................................*......................................................................................................................................................................*..........
output:
17981671
result:
ok 1 number(s): "17981671"
Test #8:
score: 0
Accepted
time: 424ms
memory: 140184kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17963615
result:
ok 1 number(s): "17963615"
Test #9:
score: 0
Accepted
time: 410ms
memory: 139980kb
input:
3000 3000 .........................................................................................................*...........................................................................................................................................................................................
output:
17945165
result:
ok 1 number(s): "17945165"
Test #10:
score: 0
Accepted
time: 395ms
memory: 139656kb
input:
3000 3000 ......................................................................................................................................*........................................................................................................................................*.....................
output:
17928211
result:
ok 1 number(s): "17928211"
Test #11:
score: 0
Accepted
time: 410ms
memory: 139240kb
input:
3000 3000 ...........................................*.........................................................................................................................................................................................................................................................
output:
17911522
result:
ok 1 number(s): "17911522"
Test #12:
score: 0
Accepted
time: 391ms
memory: 139084kb
input:
3000 3000 ..............................*................................................................................................................*.....................................................................................................................................................
output:
17892283
result:
ok 1 number(s): "17892283"
Test #13:
score: 0
Accepted
time: 389ms
memory: 138848kb
input:
3000 3000 ................................................................*....*................................................................................................................................................................................*..............................................
output:
17873837
result:
ok 1 number(s): "17873837"
Test #14:
score: 0
Accepted
time: 424ms
memory: 138728kb
input:
3000 3000 ............................................................................................*.............................................................................*.....................................................................................................*....................
output:
17856701
result:
ok 1 number(s): "17856701"
Test #15:
score: 0
Accepted
time: 400ms
memory: 138464kb
input:
3000 3000 ......................................*..........................................................................................................................................................*...................................................................................................
output:
17837857
result:
ok 1 number(s): "17837857"
Test #16:
score: 0
Accepted
time: 470ms
memory: 137376kb
input:
3000 3000 .................................................................................................................................................................................................................................*...................................................................
output:
17819731
result:
ok 1 number(s): "17819731"
Test #17:
score: 0
Accepted
time: 321ms
memory: 109640kb
input:
3000 3000 ......**.....*.......*.*..........*..*...............**.............*.......*......*........*...*.....*.*.................*......*....*.........*....................*.................*.......................*.......*..*.*.......*.......................*..........*..*......................*...
output:
16202000
result:
ok 1 number(s): "16202000"
Test #18:
score: 0
Accepted
time: 449ms
memory: 79008kb
input:
3000 3000 ..................*....*....*...*.*.............*.............*....*.*..*...*...*...*....*.................*...*.*.***...*....*......*.......**...*.......*.*...**...*...*...**.........*..........*.....*.*....*..*.......*.........*..*.....*...............**.......*.....*.*..*.*.*........*.....
output:
21600132
result:
ok 1 number(s): "21600132"
Test #19:
score: 0
Accepted
time: 91ms
memory: 30076kb
input:
3000 3000 ..*.**...*...............*........*.*..*.*.....*........*.*..........***..*..*..*..*.*....*...*.*.....***.*...*........*..*.****..*.*....**.......*......*....*..*......*......*..*..*.*..*....*..**.*.......**.*...*....**.....**..*......*...*....*..*.**.*..***...*.....*....***.*........*.......
output:
19862779430431
result:
ok 1 number(s): "19862779430431"
Test #20:
score: 0
Accepted
time: 115ms
memory: 30076kb
input:
3000 3000 .**.**..***....*.*....*..*...*.**.**.**.......*...*........*.**.*...*...**..*...*.*.**.*.*.*.*..*...*.....*.*.**.*.*....*.**.....*..**.**.*....**.**.**..*..**...*...***.**.*.*......**.**.*...****.....***.*..*.**.*......*..**.**.**.....**...*.*..***.******...**....****..***..**.*........*.....
output:
14601805246666
result:
ok 1 number(s): "14601805246666"
Test #21:
score: 0
Accepted
time: 3ms
memory: 9716kb
input:
1 1 *
output:
0
result:
ok 1 number(s): "0"
Test #22:
score: 0
Accepted
time: 2ms
memory: 11536kb
input:
1 1 .
output:
0
result:
ok 1 number(s): "0"
Test #23:
score: 0
Accepted
time: 2ms
memory: 11848kb
input:
2 2 .. ..
output:
6
result:
ok 1 number(s): "6"
Test #24:
score: 0
Accepted
time: 140ms
memory: 30068kb
input:
3000 3000 .***..**..*.*.*..*...**.*.**...***.....*..***.***.***.*..***.*......*.**.***.***.*...**.*.*..***.*..*.**..***.....*.*...***.*.***.*...*.*.....***.*..**...*.*..*.******.*.*...**.*..**.**.**.*.**..***.**.***..*......**.***.**.*....*..*.....*...*..*.*..*..*.*...**.**...*..**..***.**..*....*.....
output:
10151159625145
result:
ok 1 number(s): "10151159625145"
Test #25:
score: 0
Accepted
time: 44ms
memory: 29908kb
input:
3000 3000 *******************************************************************************************************************************************************************************************************************************************************.******************************************...
output:
39716328
result:
ok 1 number(s): "39716328"
Test #26:
score: 0
Accepted
time: 341ms
memory: 140436kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
35988321
result:
ok 1 number(s): "35988321"
Test #27:
score: 0
Accepted
time: 383ms
memory: 140740kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35981866
result:
ok 1 number(s): "35981866"
Test #28:
score: 0
Accepted
time: 521ms
memory: 140664kb
input:
3000 3000 ...**................................................................................................................................................................................................................................................................................................
output:
17988153
result:
ok 1 number(s): "17988153"
Test #29:
score: 0
Accepted
time: 402ms
memory: 140920kb
input:
3000 3000 ...*.*...............................................................................................................................................................................................................................................................................................
output:
35969654
result:
ok 1 number(s): "35969654"
Test #30:
score: 0
Accepted
time: 428ms
memory: 140960kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
17982216
result:
ok 1 number(s): "17982216"
Test #31:
score: 0
Accepted
time: 475ms
memory: 139792kb
input:
3000 3000 ....**.*.............................................................................................................................................................................................................................................................................................
output:
71916090
result:
ok 1 number(s): "71916090"
Test #32:
score: 0
Accepted
time: 405ms
memory: 140076kb
input:
3000 3000 ....****.............................................................................................................................................................................................................................................................................................
output:
71903186
result:
ok 1 number(s): "71903186"
Test #33:
score: 0
Accepted
time: 423ms
memory: 140712kb
input:
3000 3000 .........*...........................................................................................................................................................................................................................................................................................
output:
17973051
result:
ok 1 number(s): "17973051"
Test #34:
score: 0
Accepted
time: 385ms
memory: 138760kb
input:
3000 3000 .*.......*.............................................................................................................*................................................................................*............................................................................................
output:
35630636
result:
ok 1 number(s): "35630636"
Test #35:
score: 0
Accepted
time: 475ms
memory: 138616kb
input:
3000 3000 .**...........................*..........................................................................................................................................*...........................................................................................................................
output:
44529907
result:
ok 1 number(s): "44529907"
Test #36:
score: 0
Accepted
time: 447ms
memory: 138576kb
input:
3000 3000 ....*................................................................................................................................................................................................................................................................................................
output:
53426863
result:
ok 1 number(s): "53426863"
Test #37:
score: 0
Accepted
time: 492ms
memory: 138780kb
input:
3000 3000 ..*.*........................................................................*............................*...............*.............................................................................................................................................*........*...................
output:
53419301
result:
ok 1 number(s): "53419301"
Test #38:
score: 0
Accepted
time: 388ms
memory: 138328kb
input:
3000 3000 ......*.........*...................................................................................*.....................................................................................................................*................................................*.........................
output:
26705269
result:
ok 1 number(s): "26705269"
Test #39:
score: 0
Accepted
time: 479ms
memory: 138884kb
input:
3000 3000 ....*.**....*................*............................*..........*...............................................................................................................................................................................................................................
output:
17799069
result:
ok 1 number(s): "17799069"
Test #40:
score: 0
Accepted
time: 454ms
memory: 138488kb
input:
3000 3000 ...***.......................................*...........*.....................*........*...........................................................................................................................................................*................................................
output:
53393629
result:
ok 1 number(s): "53393629"
Test #41:
score: 0
Accepted
time: 456ms
memory: 140852kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
98852811
result:
ok 1 number(s): "98852811"
Test #42:
score: 0
Accepted
time: 2ms
memory: 11912kb
input:
1 3000 ........................................................................................................................................................................................................................................................................................................
output:
4498500
result:
ok 1 number(s): "4498500"
Test #43:
score: 0
Accepted
time: 463ms
memory: 138656kb
input:
3000 3000 .*.....*...........................................................................................................*...................................*........................................................................................*............*.......................................
output:
88979547
result:
ok 1 number(s): "88979547"
Test #44:
score: 0
Accepted
time: 465ms
memory: 140808kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35964327
result:
ok 1 number(s): "35964327"