Submission #336629

#	Time	Username	Problem	Language	Result	Execution time	Memory
336629		Gurban	Red-blue table (IZhO19_stones)	C++17	100 / 100	69 ms	2412 KiB

stones

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

using ll = long long;

const int maxn=1e3+5;
int tt;
int n,m,ans,b,a,tr;
char c[maxn][maxn];
priority_queue<pair<int,int>>q;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);

	cin >> tt;
	while(tt--){
		cin >> n >> m;
		tr = 0;
		if(n < m) swap(n,m),tr=1;
		for(int i = 1;i <= n;i++)
			for(int j = 1;j <= m;j++) c[i][j] = '+';
		b = (m-1)/2;
		a = n/2+1;
		ans = n + ((n*b)/a);
		while(!q.empty()) q.pop();
		for(int i = 1;i <= n;i++) if(b) q.push({b,i});
		for(int i = 1;i <= m;i++){
			for(int j = 1;j <= a;j++){
				if(q.empty()) break;
				pair<int,int>x=q.top(); q.pop();
				c[x.second][i] = '-';
				if(x.first > 1) q.push({x.first-1,x.second});
			}
		}
		cout<<ans<<'\n';
		if(tr) swap(n,m);
		for(int i = 1;i <= n;i++){
			for(int j = 1;j <= m;j++){
				if(tr){
					if(c[j][i]=='-') c[j][i]='+';
					else c[j][i]='-';
					cout<<c[j][i];
				}
				else cout<<c[i][j];
			}
			cout<<'\n';
		}
	}
}

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 16 / 16
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 31 / 31