Submission #508777

#	Time	Username	Problem	Language	Result	Execution time	Memory
508777		nichke	Furniture (JOI20_furniture)	C++14	0 / 100	2 ms	720 KiB

furniture

// I may fail a thousand times
// But there is no giving up
// IOI - here I come
#include <bits/stdc++.h>
using namespace std;
int n,m;
map<int,int> cnt;
int a[(int)1e3+5][(int)1e3+5];
signed main(){
  ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n>>m;
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			cin>>a[i][j];
			cnt[i+j]++;
		}
	}
  for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			if(a[i][j]){
				cnt[i+j]--;
			}
		}
	}
	int q;cin>>q;
	for(;q;q--){
		int x,y;cin>>x>>y;
		x--;y--;
		if(cnt[x+y]==1)cout<<0<<'\n';
		else{
			cnt[x+y]--;
			cout<<1<<'\n';
		}
	}
	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95