开二维数组

#include "stdio.h"
#include "stdlib.h"
#include "algorithm"
int main()
{
    int i,j,temp,m,n,flag;
    long long aim;
    long long **a;
    a=(long long**)malloc(sizeof(long long*)*1000);
    for(i=0;i<1000;i++)
    {a[i]=(long long*)malloc(sizeof(long long)*1000);}
    while(scanf("%d %d",&m,&n)!=EOF)
    {
        flag=0;
        scanf("%lld",&aim);
        for(i=0;i<m;i++)
            for(j=0;j<n;j++)
            {
                scanf("%lld",&a[i][j]);
                if (aim==a[i][j]) 
                    flag=1;
            }
            if(flag==1) 
                printf("Yes\n");
            else printf("No\n"); 
    }
    return 0;
}