oj.uz

Submission #224921

# Submission time Handle Problem Language Result Execution time Memory
224921 2020-04-19T05:54:45 Z Nightlight Collecting Mushrooms (NOI18_collectmushrooms) C++14
100 / 100
 22 ms 8320 KB 
#include <bits/stdc++.h>
#define pii pair<int, int>
#define x first
#define y second
using namespace std;

int R, C, D, K, P, ans;
vector<vector<int>> pre;
pii mus[500005];
char t;

int getsum(int x,int y) {
  int y1 = min(y + D, C), y0 = max(y - D - 1, 0);
  int x1 = min(x + D, R), x0 = max(x - D - 1, 0);
  return pre[x1][y1] - pre[x1][y0] - pre[x0][y1] + pre[x0][y0];
}

int main() {
  scanf("%d %d %d %d", &R, &C, &D, &K);
  pre.resize(R + 5);
  pre[0].resize(C + 5);
  getchar();
  for(int i = 1; i <= R; i++) {
    pre[i].resize(C + 5);
    for(int j = 1; j <= C; j++) {
      pre[i][j] = pre[i - 1][j] + pre[i][j - 1] - pre[i - 1][j - 1];
      t = getchar();
      if(t == 'M') {
        mus[++P] = {i, j};
      }else if(t == 'S') {
        pre[i][j]++;
      }
    }
    getchar();
  }
  for(int i = 1; i <= P; i++) {
    if(getsum(mus[i].x, mus[i].y) >= K) ans++;
  }
  printf("%d\n", ans);
}

Compilation message

mushrooms.cpp: In function 'int main()':
mushrooms.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d %d", &R, &C, &D, &K);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 7 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 7 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 7 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 384 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 1280 KB Output is correct
2 Correct 8 ms 1280 KB Output is correct
3 Correct 9 ms 1536 KB Output is correct
4 Correct 8 ms 1408 KB Output is correct
5 Correct 8 ms 1408 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 6016 KB Output is correct
2 Correct 22 ms 8320 KB Output is correct
3 Correct 20 ms 7436 KB Output is correct
4 Correct 18 ms 6272 KB Output is correct
5 Correct 20 ms 7936 KB Output is correct

Subtask #6
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 7 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 7 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 512 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 8 ms 1280 KB Output is correct
17 Correct 8 ms 1280 KB Output is correct
18 Correct 9 ms 1536 KB Output is correct
19 Correct 8 ms 1408 KB Output is correct
20 Correct 8 ms 1408 KB Output is correct
21 Correct 17 ms 6016 KB Output is correct
22 Correct 22 ms 8320 KB Output is correct
23 Correct 20 ms 7436 KB Output is correct
24 Correct 18 ms 6272 KB Output is correct
25 Correct 20 ms 7936 KB Output is correct
26 Correct 17 ms 4992 KB Output is correct
27 Correct 16 ms 4480 KB Output is correct
28 Correct 16 ms 3584 KB Output is correct
29 Correct 15 ms 3328 KB Output is correct
30 Correct 18 ms 4884 KB Output is correct