Submission #1118557

#	Time	Username	Problem	Language	Result	Execution time	Memory
1118557		vjudge1	Bitaro the Brave (JOI19_ho_t1)	C++17	20 / 100	1060 ms	2600 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
#define F first
#define S second
#define LL long long
 
#define rep(i, x) for(auto &i : (x))
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
 
#define left(x) ((x)<<1)
#define right(x) ((x)>>1)
#define LSOne(x) (x & -(x))
 
using namespace std;
using T = pair<pair<int, int>, int>;
 
const int SZ = 2e5 + 1;
const LL MOD = 1e9 + 7; 
const LL INF = 1e18 + 1;
 
LL bp (LL b, LL e, LL m = MOD) {
 if ( e == 0 ) return 1;
 LL T = bp(b, e / 2);
 T *= T; T %= m;
 if ( e & 1 ) T *= b;
 return T %= m;
}
 
LL nv_i (LL a) { return bp(a, MOD - 2); };
LL gcd (LL a, LL b) { return (b == 0 ? a : gcd(b, a % b)); }
LL lcm(LL a, LL b) { return (a * (b / gcd(a, b))); }
LL ceil (LL a, LL b) { return ((a + b - 1) / b); }
 
void solve() {
  int n, m;
  cin >> n >> m;

  vector<pair<int, int>> Js, Os, Is;
  vector<vector<char>> MC(n + 1, vector<char> (m + 1));

  for(int i = 1; i <= n; i ++) {
    for(int j = 1; j <= m; j ++) {
      char x;
      cin >> x;
      MC[i][j] = x;

      if(x == 'J') {
        Js.emplace_back(i, j);
      }
      if(x == 'O') {
        Os.emplace_back(i, j);
      }
      if(x == 'I') {
        Is.emplace_back(i, j);
      }
    }
  }


  LL ans = 0;
  rep(J, Js) {
    int cnt_Os = 0, cnt_Is = 0;

    rep(O, Os) {
      if(J.F > O.F || J.S > O.S) continue;
      if(J.F == O.F) cnt_Os ++;
    }

    rep(I, Is) {
      if(J.F > I.F || J.S > I.S) continue;
      if(J.S == I.S) cnt_Is ++;
    }

    ans += cnt_Os * cnt_Is;
  }

  cout << ans;
} 
signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0), cout.tie(0);
 
  solve();
  return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50