#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
/*
dp[i][j] = potential value in range (i, j) -> (N, M);
dp[i][j] = dp[i+1][j] + dp[i][j+1] - dp[i+1][j+1] + (sum())
*/
const int mxN = 2e3+10;
ll N, M;
char land[mxN][mxN];
ll cum[mxN][mxN];
ll maxLen(int i, int ii, int j) {
int l = j, r = M, mid;
while(l < r) {
mid = (l + r + 1) >> 1;
if ((cum[ii][mid] + cum[i-1][j-1] - cum[ii][j-1] - cum[i-1][mid]) == 0) l = mid;
else r = mid - 1;
}
return l - j + 1;
}
ll calc(int i, int j) {
ll ret = 0;
if (land[i][j] == '#')
return ret;
for (ll ii = i; ii <= N && land[ii][j] != '#'; ii++) {
ll len = maxLen(i, ii, j);
ret += (len*(len+1)/2) * (ii-i+1);
}
return ret;
}
void solve() {
cin >> N >> M;
for (int i = 1; i <= N; i++) {
for (int j = 1; j <= M; j++) {
cin >> land[i][j];
cum[i][j] = ((land[i][j] == '#') + cum[i-1][j] + cum[i][j-1] - cum[i-1][j-1]);
}
}
vector<vector<ll>> dp(mxN, vector<ll>(mxN, 0));
dp[N][M] = (land[N][M] != '#');
for (int i = N; i; i--) {
for (int j = M; j; j--) {
dp[i][j] = dp[i+1][j] + dp[i][j+1] - dp[i+1][j+1] + calc(i, j);
}
}
// for (int i = 1; i <= N; i++) {
// for (int j = 1; j <= M; j++) {
// cout << dp[i][j] << " \n"[j == M];
// }
// }
cout << dp[1][1];
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
solve();
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
32076 KB |
Output is correct |
2 |
Correct |
18 ms |
32080 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
17 ms |
32076 KB |
Output is correct |
2 |
Correct |
17 ms |
32052 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
32 ms |
34508 KB |
Output is correct |
2 |
Correct |
67 ms |
34620 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
31 ms |
34484 KB |
Output is correct |
2 |
Correct |
68 ms |
34616 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
301 ms |
34528 KB |
Output is correct |
2 |
Correct |
67 ms |
34436 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
216 ms |
45212 KB |
Output is correct |
2 |
Execution timed out |
1097 ms |
61140 KB |
Time limit exceeded |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
522 ms |
55556 KB |
Output is correct |
2 |
Execution timed out |
1095 ms |
69856 KB |
Time limit exceeded |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1099 ms |
47044 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
60 ms |
44944 KB |
Output is correct |
2 |
Execution timed out |
1070 ms |
68028 KB |
Time limit exceeded |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1095 ms |
67376 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |