Compilare: main.cpp: In function 'long long int exp(long long int)': main.cpp:9:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(n % 2 == 0) ^~ main.cpp:11:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' return (( exp(n/2) % C) * (exp(n/2) % C) * C) %C; ^~~~~~ main.cpp: In function 'int main()': main.cpp:15:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("classictask.in","r",stdin); ^ main.cpp:16:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("classictask.out","w",stdout); ^