Submission #372334

#	Time	Username	Problem	Language	Result	Execution time	Memory
372334		mariowong	Red-blue table (IZhO19_stones)	C++14	15 / 100	37 ms	1900 KiB

stones

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

int t,n,m,pos,num;
char ans[1005][1005];
int main(){
	ios::sync_with_stdio(false);
	cin >> t;
	while (t--){
		cin >> n >> m;
		//7 5
		//(n-1)/2*m / (n/2+1)    or (n-1)/2*m /(m+1)/2
		cout << max((n-1)/2*m/(n/2+1)+n,(m-1)/2*n/(m/2+1)+m) << "\n";
		if ((n-1)/2*m/(n/2+1)+n > (m-1)/2*n/(m/2+1)+m){
			for (int i=1;i<=n;i++){
				for (int j=1;j<=m;j++){
					ans[i][j]='+';
				}
			}
			num=(n-1)/2*m; pos=1;
			for (int i=1;i<=num/(n/2+1);i++){
				for (int j=1;j<=n/2+1;j++){
					ans[pos][i]='-';
					pos++; 
					if (pos == n+1)
					pos=1;
				}	
			}
		}
		else
		{
			for (int i=1;i<=n;i++){
				for (int j=1;j<=m;j++){
					ans[i][j]='-';
				}
			}
			num=(m-1)/2*n; pos=1;
			for (int i=1;i<=num/(m/2+1);i++){
				for (int j=1;j<=m/2+1;j++){
					ans[i][pos]='+';
					pos++; 
					if (pos == m+1)
					pos=1;
				}	
			}
		}
		for (int i=1;i<=n;i++){
			for (int j=1;j<=m;j++){
				cout << ans[i][j];
			}
			cout << "\n";
		}
	}
    return 0;
}	

• Subtask 1: 0 / 17
• Subtask 2: 0 / 10
• Subtask 3: 0 / 16
• Subtask 4: 0 / 11
• Subtask 5: 15 / 15
• Subtask 6: 0 / 31