Submission #334405

#	Time	Username	Problem	Language	Result	Execution time	Memory
334405		Tahmid690	Bitaro the Brave (JOI19_ho_t1)	C++14	20 / 100	115 ms	24812 KiB

joi2019_ho_t1

#include<bits/stdc++.h>
using namespace std;
#define ll int
int main(){
    ll h,w;
    string s[3005];
    cin >> h >> w;
    for(int i=0;i<h;i++) cin >> s[i];
    unordered_map<ll,ll> rows;
    unordered_map<ll,ll> colum;
    unordered_map<ll,map<ll,ll>> rowsfin;
    unordered_map<ll,map<ll,ll>> columfin;
    
    for(int i=0;i<h;i++){
        ll x=0;
        for(int j=0;j<w;j++){
            if(s[i][j]=='O') x++;
            rowsfin[i][j+1]=x;
        }
        rows[i]=x;
       
    }
    
    for(int i=0;i<w;i++){
        ll x=0;
        for(int j=0;j<h;j++){
            if(s[j][i]=='I') x++;
            columfin[i][j+1]=x;
        }
        colum[i]=x;
       
        
    }
    
    ll ans=0;
    for(ll i=0;i<h;i++){
        for(ll j=0;j<w;j++){
            if(s[i][j]=='J') ans+=((rows[i]-rowsfin[i][j])*(colum[j]-columfin[j][i]));
        }
    }
    cout << ans << endl;
    
}

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