算法训练 关联矩阵

#include<cstdio>
#include<cstdlib>
#include<cstring>
using namespace std;
int map[110][1010];
int main()
{
	int a,b,m,n,i,j;
	while(scanf("%d%d",&n,&m)==2)
	{
		memset(map,0,sizeof(map));
		for(i=1;i<=m;++i)
		{
			scanf("%d%d",&a,&b);
			map[a][i]=1;
			map[b][i]=-1;
		}
		for(i=1;i<=n;++i)
		{
			printf("%d",map[i][1]);
			for(j=2;j<=m;++j)
			{
				printf(" %d",map[i][j]);
			}
			printf("\n");
		}
	}
	return 0;
}