Submission #145178

#	Time	Username	Problem	Language	Result	Execution time	Memory
145178		TadijaSebez	Bitaro the Brave (JOI19_ho_t1)	C++11	100 / 100	152 ms	89848 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=3050;
char s[N][N];
int I[N][N],O[N][N];
int main()
{
	int n,m;
	scanf("%i %i",&n,&m);
    for(int i=1;i<=n;i++) scanf("%s",s[i]+1);
    ll ans=0;
    for(int i=n;i>=1;i--)
	{
		for(int j=m;j>=1;j--)
		{
			O[i][j]=O[i][j+1]+(s[i][j]=='O');
			I[i][j]=I[i+1][j]+(s[i][j]=='I');
			if(s[i][j]=='J') ans+=(ll)O[i][j]*I[i][j];
		}
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i %i",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:11:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1;i<=n;i++) scanf("%s",s[i]+1);
                           ~~~~~^~~~~~~~~~~~~

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