Submission #1167995

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167995		MunkhErdene	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	145 ms	151416 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define _ << " " <<
#define yes cout << "Yes\n"
#define no cout << "No\n"
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fasterAndfaster ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
const ll mod = 1e9+7;
const ll INF = 1e9;
void solve() {
    ll i, j, cnt = 0, sum = 0, ans = 0;
    string ug, ug1, ug2;
    char useg = 'a';
    ll h, w;
    cin >> h >> w;
    vector<string> g(h);
    for(auto &x: g) cin >> x;
    vector<vector<ll>> cntRowSuf(h, vector<ll>(w, 0));
    vector<vector<ll>> cntColSuf(h, vector<ll>(w, 0));
    for(i = h - 1; i >= 0; i--) {
        for(j = w - 1; j >= 0; j--) {
            cntRowSuf[i][j] = (g[i][j] == 'O') + (j + 1 < w ? cntRowSuf[i][j + 1] : 0);
            cntColSuf[i][j] = (g[i][j] == 'I') + (i + 1 < h ? cntColSuf[i + 1][j] : 0);
        }
    }
    for(i = 0; i < h; i++) {
        for(j = 0; j < w; j++) {
            if(g[i][j] == 'J') {
                cnt += cntRowSuf[i][j] * cntColSuf[i][j];
            }
        }
    }
    cout << cnt << '\n';
}  
int main(){
    fasterAndfaster;
    ll t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    return 0;
}

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