Submission #237609

#	Time	Username	Problem	Language	Result	Execution time	Memory
237609		Pbezz	T-Covering (eJOI19_covering)	C++14	5 / 100	131 ms	4216 KiB

covering

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

#define loop(i,n) for (ll i = 0; i < n; i++)

#define ll int
#define INF 1e9+5
#define MAXN 1005
#define MOD 1000000000007
#define pb push_back 
#define mp make_pair
typedef pair<ll,ll> pii;


int main(){

	ll n,m,k,r,c,ans=0;
	scanf("%d%d",&m,&n);

	int arr[m][n];

	loop(i,m){
		loop(j,n){
		scanf("%d",&arr[i][j]);
		}
	}
	scanf("%d",&k);
	loop(i,k){
	cin>>r>>c;

ll cur=arr[r][c];

if(r>0&&c>0&&r<m-1&&c<n-1){

	cur+=arr[r+1][c];
	cur+=arr[r][c+1];
	cur+=arr[r-1][c];
	cur+=arr[r][c-1];

	cur-=min(arr[r][c-1],min(arr[r][c+1],min(arr[r-1][c],arr[r+1][c])));


}else if(r==0){

	if(c==0||c==n-1)return -1;

	cur+=arr[r][c-1];
	cur+=arr[r][c+1];
	cur+=arr[r+1][c];

}else if(r==m-1){

	if(c==0||c==n-1)return -1;

	cur+=arr[r][c-1];
	cur+=arr[r][c+1];
	cur+=arr[r-1][c];

}else if(c==0){

	cur+=arr[r+1][c];
	cur+=arr[r-1][c];
	cur+=arr[r][c+1];

}else if(c==n-1){

	cur+=arr[r+1][c];
	cur+=arr[r-1][c];
	cur+=arr[r][c-1];

}


	if(cur==-1){
	printf("No\n");return 0;
}

	ans+=cur;
}

	printf("%d\n",ans);

return 0;
}

Compilation message (stderr)

covering.cpp: In function 'int main()':
covering.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&m,&n);
  ~~~~~^~~~~~~~~~~~~~
covering.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&arr[i][j]);
   ~~~~~^~~~~~~~~~~~~~~~~
covering.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&k);
  ~~~~~^~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 30