Submission #123573

#	Time	Username	Problem	Language	Result	Execution time	Memory
123573		naderjemel	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	953 ms	91148 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> ii;
typedef vector<pair<int,int> > vii;
int cumx[3005][3005];
int cumy[3005][3005];

int main(){
	int n,m;
	scanf("%d%d",&n,&m);
	vector<string> v(n);
	for(int i=0;i<n;i++){
		cin>>v[i];
	}
	for(int i=0;i<n;i++){
		for(int j=m-1;j>=0;j--){
			cumy[i][j]=cumy[i][j+1];
			if(v[i][j]=='O') cumy[i][j]++;
		}
	}
	for(int j=0;j<m;j++){
		for(int i=n-1;i>=0;i--){
			cumx[i][j]=cumx[i+1][j];
			if(v[i][j]=='I') cumx[i][j]++;
		}
	}
	ll rs=0;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			if(v[i][j]=='J'){
				rs+=cumx[i][j]*cumy[i][j];
			}
		}
	}
	printf("%lld\n", rs);
	return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~

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