QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#536366 | #833. Cells Blocking | ship2077 | AC ✓ | 109ms | 110032kb | C++14 | 1.8kb | 2024-08-29 09:00:48 | 2024-08-29 09:00:48 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
constexpr int M=3005;long long ans;bool vis[M<<1];
pair<int,int>tmp[M<<1],way1[M<<1],way2[M<<1];
int n,m,cnt0,cnt1,a[M][M],rec1[M][M],rec2[M][M];
int read(){
int x=0;char ch=getchar();
while (!isdigit(ch)) ch=getchar();
while (isdigit(ch)) x=x*10+ch-48,ch=getchar();
return x;
}
void findway1(int x,int y){
while (x!=n||y!=m)
way1[x+y]=make_pair(x,y),
(rec2[x+1][y]?x:y)++;
way1[n+m]=make_pair(n,m);
}
void findway2(int x,int y){
while (x!=n||y!=m)
way2[x+y]=make_pair(x,y),
(rec2[x][y+1]?y:x)++;
way2[n+m]=make_pair(n,m);
}
void findway3(int x,int y){
while (x!=1||y!=1)
way1[x+y]=make_pair(x,y),
(rec1[x][y-1]?y:x)--;
way1[2]=make_pair(1,1);
}
int main(){
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin>>n>>m;
for (int i=1;i<=n;i++){
string str;cin>>str;
for (int j=1;j<=m;j++)
cnt0+=a[i][j]=str[j-1]=='.';
}
rec1[1][1]=a[1][1];
for (int i=1;i<=n;i++)
for (int j=1;j<=m;j++)
if (rec1[i][j]){
if (a[i+1][j]) rec1[i+1][j]=1;
if (a[i][j+1]) rec1[i][j+1]=1;
}
rec2[n][m]=a[n][m];
for (int i=n;i;i--)
for (int j=m;j;j--)
if (rec2[i][j]){
if (a[i-1][j]) rec2[i-1][j]=1;
if (a[i][j-1]) rec2[i][j-1]=1;
}
if (!rec1[n][m]) return printf("%lld\n",1ll*cnt0*(cnt0-1)/2),0;
findway1(1,1);findway2(1,1);
for (int i=2;i<=n+m;i++)
if (way1[i]==way2[i])
cnt1++,vis[i]=1;
ans=1ll*(cnt0-cnt1)*cnt1+1ll*cnt1*(cnt1-1)/2;
for (int i=2;i<=n+m;i++) tmp[i]=way1[i];
for (int i=n+m;i>1;i--)
if (!vis[i]){
auto [x,y]=tmp[i]; x--;y++;
while (!rec1[x][y]||!rec2[x][y])
x--,y++;
findway1(x,y);findway3(x,y);
for (int j=2;j<=n+m;j++)
if (!vis[j]&&way1[j]==way2[j])
ans++;
}
printf("%lld\n",ans);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 7804kb
input:
3 3 ... ... ...
output:
17
result:
ok 1 number(s): "17"
Test #2:
score: 0
Accepted
time: 1ms
memory: 8136kb
input:
3 3 .** .*. ...
output:
15
result:
ok 1 number(s): "15"
Test #3:
score: 0
Accepted
time: 1ms
memory: 7888kb
input:
3 4 **** .... ****
output:
6
result:
ok 1 number(s): "6"
Test #4:
score: 0
Accepted
time: 1ms
memory: 8108kb
input:
5 5 *.... .*.*. ***** *.*** ..*..
output:
66
result:
ok 1 number(s): "66"
Test #5:
score: 0
Accepted
time: 1ms
memory: 8112kb
input:
10 10 ...***.*.. **...*.*** ...***.*.. .**...*.*. .*****..*. ..*.****.* .**...**** ..*..*.*.* *.*.**.... ....**...*
output:
1378
result:
ok 1 number(s): "1378"
Test #6:
score: 0
Accepted
time: 80ms
memory: 110004kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17999999
result:
ok 1 number(s): "17999999"
Test #7:
score: 0
Accepted
time: 88ms
memory: 109704kb
input:
3000 3000 ...................................................................................................................*......................................................................................................................................................................*..........
output:
17981671
result:
ok 1 number(s): "17981671"
Test #8:
score: 0
Accepted
time: 83ms
memory: 109696kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
17963615
result:
ok 1 number(s): "17963615"
Test #9:
score: 0
Accepted
time: 87ms
memory: 109768kb
input:
3000 3000 .........................................................................................................*...........................................................................................................................................................................................
output:
17945165
result:
ok 1 number(s): "17945165"
Test #10:
score: 0
Accepted
time: 94ms
memory: 109724kb
input:
3000 3000 ......................................................................................................................................*........................................................................................................................................*.....................
output:
17928211
result:
ok 1 number(s): "17928211"
Test #11:
score: 0
Accepted
time: 87ms
memory: 109672kb
input:
3000 3000 ...........................................*.........................................................................................................................................................................................................................................................
output:
17911522
result:
ok 1 number(s): "17911522"
Test #12:
score: 0
Accepted
time: 91ms
memory: 109964kb
input:
3000 3000 ..............................*................................................................................................................*.....................................................................................................................................................
output:
17892283
result:
ok 1 number(s): "17892283"
Test #13:
score: 0
Accepted
time: 84ms
memory: 109996kb
input:
3000 3000 ................................................................*....*................................................................................................................................................................................*..............................................
output:
17873837
result:
ok 1 number(s): "17873837"
Test #14:
score: 0
Accepted
time: 92ms
memory: 109764kb
input:
3000 3000 ............................................................................................*.............................................................................*.....................................................................................................*....................
output:
17856701
result:
ok 1 number(s): "17856701"
Test #15:
score: 0
Accepted
time: 97ms
memory: 109768kb
input:
3000 3000 ......................................*..........................................................................................................................................................*...................................................................................................
output:
17837857
result:
ok 1 number(s): "17837857"
Test #16:
score: 0
Accepted
time: 78ms
memory: 109632kb
input:
3000 3000 .................................................................................................................................................................................................................................*...................................................................
output:
17819731
result:
ok 1 number(s): "17819731"
Test #17:
score: 0
Accepted
time: 109ms
memory: 109712kb
input:
3000 3000 ......**.....*.......*.*..........*..*...............**.............*.......*......*........*...*.....*.*.................*......*....*.........*....................*.................*.......................*.......*..*.*.......*.......................*..........*..*......................*...
output:
16202000
result:
ok 1 number(s): "16202000"
Test #18:
score: 0
Accepted
time: 100ms
memory: 109664kb
input:
3000 3000 ..................*....*....*...*.*.............*.............*....*.*..*...*...*...*....*.................*...*.*.***...*....*......*.......**...*.......*.*...**...*...*...**.........*..........*.....*.*....*..*.......*.........*..*.....*...............**.......*.....*.*..*.*.*........*.....
output:
21600132
result:
ok 1 number(s): "21600132"
Test #19:
score: 0
Accepted
time: 20ms
memory: 47652kb
input:
3000 3000 ..*.**...*...............*........*.*..*.*.....*........*.*..........***..*..*..*..*.*....*...*.*.....***.*...*........*..*.****..*.*....**.......*......*....*..*......*......*..*..*.*..*....*..**.*.......**.*...*....**.....**..*......*...*....*..*.**.*..***...*.....*....***.*........*.......
output:
19862779430431
result:
ok 1 number(s): "19862779430431"
Test #20:
score: 0
Accepted
time: 19ms
memory: 44008kb
input:
3000 3000 .**.**..***....*.*....*..*...*.**.**.**.......*...*........*.**.*...*...**..*...*.*.**.*.*.*.*..*...*.....*.*.**.*.*....*.**.....*..**.**.*....**.**.**..*..**...*...***.**.*.*......**.**.*...****.....***.*..*.**.*......*..**.**.**.....**...*.*..***.******...**....****..***..**.*........*.....
output:
14601805246666
result:
ok 1 number(s): "14601805246666"
Test #21:
score: 0
Accepted
time: 1ms
memory: 7828kb
input:
1 1 *
output:
0
result:
ok 1 number(s): "0"
Test #22:
score: 0
Accepted
time: 1ms
memory: 7868kb
input:
1 1 .
output:
0
result:
ok 1 number(s): "0"
Test #23:
score: 0
Accepted
time: 0ms
memory: 7796kb
input:
2 2 .. ..
output:
6
result:
ok 1 number(s): "6"
Test #24:
score: 0
Accepted
time: 19ms
memory: 41456kb
input:
3000 3000 .***..**..*.*.*..*...**.*.**...***.....*..***.***.***.*..***.*......*.**.***.***.*...**.*.*..***.*..*.**..***.....*.*...***.*.***.*...*.*.....***.*..**...*.*..*.******.*.*...**.*..**.**.**.*.**..***.**.***..*......**.***.**.*....*..*.....*...*..*.*..*..*.*...**.**...*..**..***.**..*....*.....
output:
10151159625145
result:
ok 1 number(s): "10151159625145"
Test #25:
score: 0
Accepted
time: 27ms
memory: 41620kb
input:
3000 3000 *******************************************************************************************************************************************************************************************************************************************************.******************************************...
output:
39716328
result:
ok 1 number(s): "39716328"
Test #26:
score: 0
Accepted
time: 81ms
memory: 109960kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
35988321
result:
ok 1 number(s): "35988321"
Test #27:
score: 0
Accepted
time: 85ms
memory: 109676kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35981866
result:
ok 1 number(s): "35981866"
Test #28:
score: 0
Accepted
time: 93ms
memory: 109724kb
input:
3000 3000 ...**................................................................................................................................................................................................................................................................................................
output:
17988153
result:
ok 1 number(s): "17988153"
Test #29:
score: 0
Accepted
time: 81ms
memory: 109740kb
input:
3000 3000 ...*.*...............................................................................................................................................................................................................................................................................................
output:
35969654
result:
ok 1 number(s): "35969654"
Test #30:
score: 0
Accepted
time: 76ms
memory: 109772kb
input:
3000 3000 ..*..................................................................................................................................................................................................................................................................................................
output:
17982216
result:
ok 1 number(s): "17982216"
Test #31:
score: 0
Accepted
time: 90ms
memory: 110032kb
input:
3000 3000 ....**.*.............................................................................................................................................................................................................................................................................................
output:
71916090
result:
ok 1 number(s): "71916090"
Test #32:
score: 0
Accepted
time: 73ms
memory: 109704kb
input:
3000 3000 ....****.............................................................................................................................................................................................................................................................................................
output:
71903186
result:
ok 1 number(s): "71903186"
Test #33:
score: 0
Accepted
time: 79ms
memory: 109760kb
input:
3000 3000 .........*...........................................................................................................................................................................................................................................................................................
output:
17973051
result:
ok 1 number(s): "17973051"
Test #34:
score: 0
Accepted
time: 96ms
memory: 109736kb
input:
3000 3000 .*.......*.............................................................................................................*................................................................................*............................................................................................
output:
35630636
result:
ok 1 number(s): "35630636"
Test #35:
score: 0
Accepted
time: 83ms
memory: 109700kb
input:
3000 3000 .**...........................*..........................................................................................................................................*...........................................................................................................................
output:
44529907
result:
ok 1 number(s): "44529907"
Test #36:
score: 0
Accepted
time: 86ms
memory: 109672kb
input:
3000 3000 ....*................................................................................................................................................................................................................................................................................................
output:
53426863
result:
ok 1 number(s): "53426863"
Test #37:
score: 0
Accepted
time: 75ms
memory: 109676kb
input:
3000 3000 ..*.*........................................................................*............................*...............*.............................................................................................................................................*........*...................
output:
53419301
result:
ok 1 number(s): "53419301"
Test #38:
score: 0
Accepted
time: 87ms
memory: 109764kb
input:
3000 3000 ......*.........*...................................................................................*.....................................................................................................................*................................................*.........................
output:
26705269
result:
ok 1 number(s): "26705269"
Test #39:
score: 0
Accepted
time: 86ms
memory: 109732kb
input:
3000 3000 ....*.**....*................*............................*..........*...............................................................................................................................................................................................................................
output:
17799069
result:
ok 1 number(s): "17799069"
Test #40:
score: 0
Accepted
time: 93ms
memory: 109628kb
input:
3000 3000 ...***.......................................*...........*.....................*........*...........................................................................................................................................................*................................................
output:
53393629
result:
ok 1 number(s): "53393629"
Test #41:
score: 0
Accepted
time: 93ms
memory: 109964kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
98852811
result:
ok 1 number(s): "98852811"
Test #42:
score: 0
Accepted
time: 1ms
memory: 7932kb
input:
1 3000 ........................................................................................................................................................................................................................................................................................................
output:
4498500
result:
ok 1 number(s): "4498500"
Test #43:
score: 0
Accepted
time: 94ms
memory: 109680kb
input:
3000 3000 .*.....*...........................................................................................................*...................................*........................................................................................*............*.......................................
output:
88979547
result:
ok 1 number(s): "88979547"
Test #44:
score: 0
Accepted
time: 100ms
memory: 109696kb
input:
3000 3000 .....................................................................................................................................................................................................................................................................................................
output:
35964327
result:
ok 1 number(s): "35964327"