图的存储（复习）——3116 SDUT图的基本存储的基本方式一

Posted 2021-02-17 tjack

https://acm.sdut.edu.cn/onlinejudge2/index.php/Home/Contest/contestproblem/cid/2872/pid/3116

//因为 顶点少 所以可以用邻接矩阵存图

#include <stdio.h>
#include <stdlib.h>
char G[5111][5111];
int main()
{
    int n, m;
    while(~scanf("%d %d", &n, &m))
    {
        memset(G, -1, sizeof(G));
        int i;

        for(i = 0;i < m;i++)
        {
            int u,v;
            scanf("%d %d", &u, &v);

            G[u][v] = 1;
        }
        long q;
        scanf("%ld", &q);
        while(q--)
        {

            int u, v;
            scanf("%d %d", &u, &v);
            if(G[u][v]!= -1)printf("Yes
");
            else printf("No
");
        }

    }

    return 0;
}