Compilare: user.cpp: In function ‘void expo(int, int)’: user.cpp:37:11: warning: statement has no effect [-Wunused-value] for (i; b/x >= prim[sol[k]] && i <= 47; i++) ^ user.cpp: In function ‘int main()’: user.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < val.size(); i++) ^ user.cpp:80:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumpanit.in", "r", stdin); ^ user.cpp:81:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumpanit.out", "w", stdout); ^ user.cpp:83:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &a, &b); ^