Submission #202868

#	Time	Username	Problem	Language	Result	Execution time	Memory
202868		luciocf	Red-blue table (IZhO19_stones)	C++14	27 / 100	63 ms	1528 KiB

stones

#include <bits/stdc++.h>

using namespace std;

const int maxn = 1e3+10;

char tab[maxn][maxn];

int main(void)
{
	int t;
	scanf("%d", &t);

	while (t--)
	{
		int n, m;
		scanf("%d %d", &n, &m);

		int mx = 0, ind = 1;

		for (int A = 0; A <= n; A++)
		{
			int qtd = (m+2)/2;
			int B = m-qtd;

			if (n-A >= (n+2)/2) B = m;

			if (A+B > mx)
				mx = A+B, ind = A;
		}

		for (int i = 1; i <= n; i++)
		{
			for (int j = 1; j <= m; j++)
			{
				if (i <= ind && j <= (m+2)/2)
					tab[i][j] = '+';
				else
					tab[i][j] = '-';
			}
		}

		printf("%d\n", mx);
		for (int i = 1; i <= n; i++)
		{
			for (int j = 1; j <= m; j++)
				printf("%c", tab[i][j]);
			printf("\n");
		}
	}
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &t);
  ~~~~~^~~~~~~~~~
stones.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &n, &m);
   ~~~~~^~~~~~~~~~~~~~~~~

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