Submission #168887

#	Time	Username	Problem	Language	Result	Execution time	Memory
168887		abil	Red-blue table (IZhO19_stones)	C++14	15 / 100	124 ms	4084 KiB

stones

#include <bits/stdc++.h>

#define fr first
#define sc second
#define pb push_back
#define mk make_pair
#define all(s) s.begin(),s.end()
//#define int long long

using namespace std;

const int N = (1e3 + 12);
const int mod = (1e9 + 7);
const int INF = (0x3f3f3f3f);

int a[N][N], b[N];

main()
{
	int test, n, m;
	scanf("%d", &test);
	while(test--){
		scanf("%d%d", &n, &m);
		if(n >= m){
			int ans = n;
			int midn = n / 2 + 1, midm = m / 2 + 1;
			vector<pair<int,int > > vec;
			for(int i = 1;i <= m; i++){
				for(int j = 1;j <= n; j++){
					vec.pb({b[j], j});
				}
				sort(all(vec));
				if(vec[midm - 1].fr < n - midn){
					ans++;
					for(int j = 0;j < midm; j++){
						a[vec[j].sc][i] = 1;
						b[vec[j].sc]++;
					}
					vec.clear();
				}
				else{
					break;
				}
			}
			cout << ans << endl;
			for(int i = 1;i <= n; i++){
				for(int j = 1;j <= m; j++){
					if(a[i][j]){
						printf("-");
					}
					else{
						printf("+");
					}
				}
				cout << endl;
			}
		}
		else{
			int ans = m;
			int midn = n / 2 + 1, midm = m / 2 + 1;
			vector<pair<int,int > > vec;
			for(int i = 1;i <= n; i++){
				for(int j = 1;j <= m; j++){
					vec.pb({b[j], j});
				}
				sort(all(vec));
				if(vec[midn - 1].fr < m - midm){
					ans++;
					for(int j = 0;j < midn; j++){
						a[i][vec[j].sc] = 1;
						b[vec[j].sc]++;
					}
					vec.clear();
				}
				else{
					break;
				}
			}
			cout << ans << endl;
			for(int i = 1;i <= n; i++){
				for(int j = 1;j <= m; j++){
					if(a[i][j]){
						printf("+");
					}
					else{
						printf("-");
					}
				}
				cout << endl;
			}
		}
		for(int i = 1;i <= n; i++){
			for(int j = 1;j <= m; j++){
				a[i][j] = 0;
			}
		}
		for(int i = 1;i <= max(n, m); i++){
			b[i] = 0;
		}
	}
}

Compilation message (stderr)

stones.cpp:18:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
stones.cpp: In function 'int main()':
stones.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &test);
  ~~~~~^~~~~~~~~~~~~
stones.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &m);
   ~~~~~^~~~~~~~~~~~~~~~

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