Submission #1049592

#	Time	Username	Problem	Language	Result	Execution time	Memory
1049592		vjudge1	Bitaro the Brave (JOI19_ho_t1)	C++11	100 / 100	133 ms	151376 KiB

joi2019_ho_t1

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define pb push_back
#define skdkdjfkv ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

void solve(){
    ll h, w;
    cin >> h >> w;
    string s[h+1];
    for(int i=1; i<=h; i++){
        cin >> s[i];
    }
    ll sufho[h+5][w+5], sufvi[w+5][h+5];
    for(int i=1; i<=h; i++){
        sufho[i][w+1]=0;
        for(int j=w; j>=1; j--){
            sufho[i][j]=sufho[i][j+1]+(s[i][j-1]=='O');
        }
    }
    for(int j=1; j<=w; j++){
        sufvi[j][h+1]=0;
        for(int i=h; i>=1; i--){
            sufvi[j][i]=sufvi[j][i+1]+(s[i][j-1]=='I');
        }
    }
    ll ans=0;
    for(int i=1; i<=h; i++){
        for(int j=1; j<=w; j++){
            if(s[i][j-1]=='J'){
                ans+=sufho[i][j+1]*sufvi[j][i+1];
            }
        }
    }
    cout << ans;
}

int main(){
    skdkdjfkv
    ll tc=1;
    //cin >> tc;
    while(tc--){
        solve();
    }
}

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