Submission #519770

#	Time	Username	Problem	Language	Result	Execution time	Memory
519770		andreeatomescu16	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	742 ms	158844 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

long long n, m, s, nri, nro, v[3001][3001], w[3001][3001];
char a[3001][3001];

int main()
{
    cin>>n>>m;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++)
            cin>>a[i][j];
    for(int j=m; j>=1; j--)
    {
        for(int i=n; i>=1; i--)
            if(a[i][j]=='I')
            {
                nri++;
                v[i][j]=nri;
            }
            else
                v[i][j]=nri;
        nri=0;
    }
    for(int i=n; i>=1; i--)
    {
        for(int j=m; j>=1; j--)
            if(a[i][j]=='O')
            {
                nro++;
                w[i][j]=nro;
            }
            else
                w[i][j]=nro;
        nro=0;
    }
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++)
            if(a[i][j]=='J')
                s+=v[i][j]*w[i][j];
    cout<<s;
    return 0;
}

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