Submission #946720

#	Time	Username	Problem	Language	Result	Execution time	Memory
946720		irmuun	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	185 ms	89432 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 all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll h,w;
    cin>>h>>w;
    ll a[h][w];
    string s[h];
    for(ll i=0;i<h;i++){
        cin>>s[i];
    }
    for(ll i=0;i<h;i++){
        ll cur=0;
        for(ll j=w-1;j>=0;j--){
            if(s[i][j]=='O'){
                cur++;
            }
            a[i][j]=cur;
        }
    }
    ll ans=0;
    for(ll j=0;j<w;j++){
        ll cur=0;
        for(ll i=h-1;i>=0;i--){
            if(s[i][j]=='I'){
                cur++;
            }
            if(s[i][j]=='J'){
                ans+=cur*a[i][j];
            }
        }
    }
    cout<<ans;
}

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