Submission #391198

#	Time	Username	Problem	Language	Result	Execution time	Memory
391198		Aryan_Raina	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	155 ms	159780 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define ld long double
#define ar array
 
const int INF = 1e17;
const int MOD = 998244353;

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m; cin>>n>>m;
    string s[n];
    for (auto &i : s) cin>>i;
    int sfO[n][m], sfI[n][m];
    int ans = 0;
    for (int i = n-1; i >= 0; --i) {
        for (int j = m-1; j >= 0; --j) {
            sfO[i][j] = (j+1 < m) ? sfO[i][j+1] : 0;
            sfI[i][j] = (i+1 < n) ? sfI[i+1][j] : 0;
            if (s[i][j] == 'J') ans += sfO[i][j]*sfI[i][j]; 
            if (s[i][j] == 'O') sfO[i][j] = 1 + ((j+1 < m) ? sfO[i][j+1] : 0);
            if (s[i][j] == 'I') sfI[i][j] = 1 + ((i+1 < n) ? sfI[i+1][j] : 0);
        } 
    }
    cout<<ans<<"\n";
} 

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