POJ 2029 Palindromes _easy version

#include<cstdio>
#include<cstring>
using namespace std;
int main()
{
    int n;
    char str[100000];
    scanf("%d", &n);
    while(n--)
    {
        scanf("%s", str);
        int len = strlen(str);
        int flag = 1;
        for(int i = 0, j = len-1; i <= j; i++, j--)
        {
            if(str[i] != str[j])
            {
                flag = 0;
                break;
            }
        }
        if(!flag) printf("no\n");
        else printf("yes\n");
    }
    return 0;
}