oj.uz

Submission #224781

# Submission time Handle Problem Language Result Execution time Memory
224781 2020-04-18T18:58:11 Z Nightlight Collecting Mushrooms (NOI18_collectmushrooms) C++14
100 / 100
 24 ms 7808 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() {
//  freopen("inp", "r", stdin);
  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:20:8: 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 5 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 4 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 5 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 4 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 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 5 ms 384 KB Output is correct
3 Correct 5 ms 512 KB Output is correct
4 Correct 5 ms 384 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 1152 KB Output is correct
2 Correct 8 ms 1152 KB Output is correct
3 Correct 9 ms 1536 KB Output is correct
4 Correct 9 ms 1408 KB Output is correct
5 Correct 10 ms 1408 KB Output is correct

Subtask #5
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 5620 KB Output is correct
2 Correct 21 ms 7808 KB Output is correct
3 Correct 19 ms 7040 KB Output is correct
4 Correct 19 ms 5888 KB Output is correct
5 Correct 19 ms 7552 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 5 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 4 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 512 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 8 ms 1152 KB Output is correct
17 Correct 8 ms 1152 KB Output is correct
18 Correct 9 ms 1536 KB Output is correct
19 Correct 9 ms 1408 KB Output is correct
20 Correct 10 ms 1408 KB Output is correct
21 Correct 17 ms 5620 KB Output is correct
22 Correct 21 ms 7808 KB Output is correct
23 Correct 19 ms 7040 KB Output is correct
24 Correct 19 ms 5888 KB Output is correct
25 Correct 19 ms 7552 KB Output is correct
26 Correct 18 ms 4992 KB Output is correct
27 Correct 17 ms 4480 KB Output is correct
28 Correct 16 ms 3712 KB Output is correct
29 Correct 16 ms 3328 KB Output is correct
30 Correct 24 ms 4840 KB Output is correct