Submission #1023565

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023565		vjudge1	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	253 ms	150396 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
ll h,w,rw[3001][3001],cl[3001][3001],tong;
char a[3001][3001];
main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    cin>>h>>w;
    for (int i=1;i<=h;++i)
    {
        for (int j=1;j<=w;++j)
        {
            cin>>a[i][j];
            rw[i][j]=rw[i][j-1];
            if (a[i][j]=='O') rw[i][j]++;
            cl[i][j]=cl[i-1][j];
            if (a[i][j]=='I') cl[i][j]++;
        }
    }
    for (int i=1;i<=h;++i)
    {
        for (int j=1;j<=w;++j)
        {
            if (a[i][j]=='J')
            {
                tong+=(rw[i][w]-rw[i][j])*(cl[h][j]-cl[i][j]);
            }
        }
    }
    cout<<tong;
}

Compilation message (stderr)

joi2019_ho_t1.cpp:8:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    8 | main()
      | ^~~~

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