Submission #539776

#	Time	Username	Problem	Language	Result	Execution time	Memory
539776		krit3379	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	280 ms	88500 KiB

joi2019_ho_t1

#include<bits/stdc++.h>
using namespace std;
#define N 3005

int a[N][N],b[N][N];
long long ans;
char s[N][N];

int main(){
    int n,m,i,j;
    scanf("%d %d",&n,&m);
    for(i=1;i<=n;i++){
        scanf(" %s",s[i]+1);
    }
    for(i=1;i<=n;i++){
        for(j=m;j>0;j--){
            if(s[i][j]=='O')a[i][j]++;
            a[i][j]+=a[i][j+1];
        }
    }
    for(i=1;i<=m;i++){
        for(j=n;j>0;j--){
            if(s[j][i]=='I')b[j][i]++;
            b[j][i]+=b[j+1][i];
        }
    }
    for(i=1;i<=n;i++)for(j=1;j<=m;j++)if(s[i][j]=='J')ans+=a[i][j]*b[i][j];
    printf("%lld",ans);
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%d %d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         scanf(" %s",s[i]+1);
      |         ~~~~~^~~~~~~~~~~~~~

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