Submission #777744

#	Time	Username	Problem	Language	Result	Execution time	Memory
777744		vjudge1	T-Covering (eJOI19_covering)	C++17	0 / 100	2 ms	412 KiB

covering

#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);
//#define endl "\n"
#define ll long long
#define pb push_back
#define N 200005
#define f first
#define s second
int n,m;
int yes;
vector<pair<int,int>> v;
int main(){
	cin>>n>>m;
	int arr[n+2][m+2],doldur[n+2][m+2],isaret[n+2][m+1];
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			cin>>arr[i][j];
			doldur[i][j]=0;
			isaret[i][j]=0;

		}
	}
	for(int i=1;i<=n;i++){
		arr[i][0]=arr[i][n+1]=arr[0][i]=arr[n+1][i]=0;
		isaret[i][0]=isaret[i][n+1]=isaret[0][i]=isaret[n+1][i]=0;
		doldur[i][0]=doldur[i][n+1]=doldur[0][i]=doldur[n+1][i]=1;
	}
	int q;
	ll int cev=0;
	while(q--){
		int x,y;cin>>x>>y;
		x++;y++;
		v.pb({x,y});
		doldur[x][y]=2;
		cev+=arr[x][y];
	}
	vector<pair<int,int>> bir={{1,0},{0,1},{-1,0},{0,-1}};

	sort(v.begin(),v.end());
	for(auto u:v){
		int x=u.f,y=u.s;
		int kac=0;
		for(auto uwu:bir){
			int ek1=uwu.f, ek2=uwu.s;
			if(doldur[x+ek1][y+ek2]!=0)kac++;
		}
		if(kac<3){cout<<"No"<<endl;return 0;}
		if(kac==3){
			for(auto uwu:bir){
				int ek1=uwu.f, ek2=uwu.s;
				if(doldur[x+ek1][y+ek2]==0){
					cev+=arr[x+ek1][y+ek2];
				}
			}
			isaret[x][y]=1;
		}
	}
	for(auto u:v){

		int x=u.f,y=u.s;
		if(isaret[x][y])continue;
		int mn=1000000000,kac=0;
		for(auto uwu:bir){
			int ek1=uwu.f, ek2=uwu.s;
			if(doldur[x+ek1][y+ek2]==0){
				cev+=arr[x+ek1][y+ek2];
				mn=min(mn,arr[x+ek1][y+ek2]);
				kac++;
			}
		}
		if(kac==4)cev-=mn;
	}
	cout<<cev<<endl;
}

Compilation message (stderr)

covering.cpp: In function 'int main()':
covering.cpp:31:9: warning: 'q' is used uninitialized in this function [-Wuninitialized]
   31 |  while(q--){
      |        ~^~

• Subtask 1: 0 / 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