Submission #238849

#	Time	Username	Problem	Language	Result	Execution time	Memory
238849		arnold518	Red-blue table (IZhO19_stones)	C++14	100 / 100	63 ms	2272 KiB

stones

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1000;

int TC, N, M;
char S[MAXN+10][MAXN+10];

int main()
{
	int i, j, k;

	scanf("%d", &TC);
	while(TC--)
	{
		scanf("%d%d", &N, &M);

		int ans=0; pii t;
		for(i=0; i<=N; i++)
		{
			for(j=0; j<=M; j++)
			{
				int x=min((M-1)/2, j);
				int y=max(0, i-(N-1)/2);
				if(x*i>=y*j) { if(ans<=i+j) ans=i+j, t={i, j}; }
			}
		}

		for(i=0; i<N; i++) for(j=0; j<M; j++) S[i][j]='+';

		int a=t.first, b=t.second;
		int x=min((M-1)/2, b);
		int y=max(0, a-(N-1)/2);

		for(j=0, i=0; j<b; j++)
		{
			for(k=0; k<y; k++, i=(i+1)%a)
			{
				S[i][j]='-';
			}
		}
		for(i=a; i<N; i++) for(j=0; j<b; j++) S[i][j]='-';

		printf("%d\n", ans);
		for(i=0; i<N; i++) { for(j=0; j<M; j++) printf("%c", S[i][j]); printf("\n"); }
	}
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:36:7: warning: unused variable 'x' [-Wunused-variable]
   int x=min((M-1)/2, b);
       ^
stones.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &TC);
  ~~~~~^~~~~~~~~~~
stones.cpp:20:8: 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: 16 / 16
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 31 / 31