Compilare: main.cpp: In function 'long long int getphi(long long int)': main.cpp:19:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if (nr != 1) ^~ main.cpp:22:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' return cur; ^~~~~~ main.cpp: In function 'int main()': main.cpp:27:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.in","r",stdin); ^ main.cpp:28:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inversmodular.out","w",stdout); ^ main.cpp:30:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld\n",&N,&M); ^