Submission #895423

#	Time	Username	Problem	Language	Result	Execution time	Memory
895423		Richw818	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	182 ms	54424 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int h, w;
  cin >> h >> w;
  vector<string> grid(h);
  for (int i = 0; i < h; i++) {
    cin >> grid[i];
  }
  vector<vector<int>> ibelow(h, vector<int>(w));
  for (int c = 0; c < w; c++) {
    int i = 0;
    for (int r = h - 1; r >= 0; r--) {
      i += (grid[r][c] == 'I');
      ibelow[r][c] = i;
    }
  }
  long long ans = 0;
  for (int r = 0; r < h; r++) {
    int o = 0;
    for (int c = w - 1; c >= 0; c--) {
      o += (grid[r][c] == 'O');
      if (grid[r][c] == 'J') {
        ans += ibelow[r][c] * o;
      }
    }
  }
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50