Submission #911013

#	Time	Username	Problem	Language	Result	Execution time	Memory
911013		penguin133	Red-blue table (IZhO19_stones)	C++17	27 / 100	27 ms	1372 KiB

stones

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

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

void solve(){
	int n, m; cin >> n >> m;
	cout << max(n, m) + (min(n, m) - 1) / 2 << '\n';
	if(n > m){
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++){
				if(j <= (m - 1) / 2)cout << '-';
				else cout << '+';
			}
			cout << '\n';
		}
	}
	else{
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++){
				if(i <= (n - 1) / 2)cout << '+';
				else cout << '-';
			}
			cout << '\n';
		}
	}
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message (stderr)

stones.cpp:37:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   37 | main(){
      | ^~~~

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