Submission #529337

#	Time	Username	Problem	Language	Result	Execution time	Memory
529337		daisy	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	392 ms	159076 KiB

joi2019_ho_t1

#include<iostream>
#define endl '\n'
using namespace std;
long long red,col,bro[3005][3005],bri[3005][3005],br=0;
char c[3005][3005];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>red>>col;

    for(long long i=0;i<red;i++)
    {
        for(long long j=0;j<col;j++)
        {
            cin>>c[i][j];
        }
    }

    for(long long i=0;i<red;i++)
    {
        for(long long j=col-1;j>=0;j--)
        {
            if(c[i][j]=='O') bro[i][j]++;
            bro[i][j]+=bro[i][j+1];
        }
    }
    for(long long i=0;i<col;i++)
    {
        for(long long j=red-1;j>=0;j--)
        {
            if(c[j][i]=='I') bri[j][i]++;
            bri[j][i]+=bri[j+1][i];
        }
    }
     for(long long i=0;i<red;i++)
     {
        for(long long j=0;j<col;j++)
        {
            if(c[i][j]=='J') br+=(bro[i][j+1]*bri[i+1][j]);
        }
     }
    cout<<br<<endl;
}

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