hdu 1061 快速幂

求n^n的个位

Sample Input

2

3

4

Sample Output

7

6

直接快速幂了，注意要用long long

 1 #include<cstdio>
 2 long long quick_mod(long long a,long long b,long long m) {
 3     long long ans = 1;
 4     while (b) {
 5         if (b&1) {
 6             ans = (ans * a) % m;
 7             b--;
 8         }
 9         b/=2;
10         a = a * a% m;
11     }
12     return ans;
13 }
14 int main()
15 {
16     int t,n;
17     scanf("%d",&t);
18     while(t--)
19     {
20         scanf("%d",&n);
21         printf("%lld\n",quick_mod(n,n,10));
22     }
23     return 0;
24 }