Created
January 13, 2019 20:15
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| int ggt(int m, int n) | |
| { | |
| if(!m) | |
| return n; | |
| return ggt(n%m , m); | |
| } | |
| int phi(int n) | |
| { | |
| int cnt = 0; | |
| for(int i = 1; i < n; i++) | |
| { | |
| if(ggt(i, n) == 1) | |
| { | |
| cnt++; | |
| //printf("%d\n", i); | |
| } | |
| } | |
| return cnt; | |
| } |
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