Submission #1282341

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282341		Faisal_Saqib	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	265 ms	79728 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
const int N=3001;
char g[N][N];
int cor[N][N],cig[N][N];
int main()
{
    ios::sync_with_stdio(0);
    cout.tie(0);
    cin.tie(0);
    int n,m;
    cin>>n>>m;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<m;j++)
        {
            cin>>g[i][j];
        }
        for(int j=m-1;j>=0;j--)
        {
            cor[i][j]=(g[i][j]=='O');
            if(j+1<m)cor[i][j]+=cor[i][j+1];
        }
    }
    for(int j=0;j<m;j++)
    {
        for(int i=n-1;i>=0;i--)
        {
            cig[i][j]=(g[i][j]=='I');
            if(i+1<n)cig[i][j]+=cig[i+1][j];
        }
    }
    long long ans=0;
    for(int i=0;i<n;i++)
    {
        for(int j=0;j<m;j++)
        {
            if(g[i][j]=='J')
            {
                ans+=cig[i][j]*cor[i][j];
            }
        }
    }
    cout<<ans<<endl;
}

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