Submission #936626

#	Time	Username	Problem	Language	Result	Execution time	Memory
936626		adkjt	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	249 ms	129364 KiB

joi2019_ho_t1

#include<bits/stdc++.h>
using namespace std;
/*struct O
{
    int l,i;
    bool operator<(const O&o)const{
        return l<o.l;
    }
};
struct I
{
    int k,j;
    bool operator<(const I&o)const{
        return k<o.k;
    }
};*/
char t[3333][3333];
int qso[3333][3333];
int qsi[3333][3333];
queue<pair<int,int>> J;
int main()
{
    cin.tie()->sync_with_stdio(0);
    int r,c;cin>>r>>c;
    for(int i= 1;i<=r;i++)
        for(int j=1;j<=c;j++)
    {
        cin>>t[i][j];
        if(t[i][j]=='J')
        J.push({i,j});
        else if(t[i][j]=='O')
            qso[i][j]=1;
        else
            qsi[i][j]=1;
    }
    long long ans=0;
    for(int i=1;i<=r;i++)
    {
        for(int j=1;j<=c;j++)
        {
            qso[i][j]+=qso[i][j-1];
            qsi[i][j]+=qsi[i-1][j];
        }
    }
    while(!J.empty())
    {
        pair<int,int> now=J.front();
       // cout<<now.first<<' '<<now.second<<'\n';
        J.pop();
        ans+=(qso[now.first][c]-qso[now.first][now.second])*(qsi[r][now.second]-qsi[now.first][now.second]);
    }

    cout<<ans;
}

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