Compilare: user.cpp:49:1: warning: floating constant exceeds range of ‘double’ [-Woverflow] double ans = 1e500; ^ user.cpp: In function ‘void back(int, double, int)’: user.cpp:59:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pas == primes.size()) { ^ user.cpp: In function ‘int main()’: user.cpp:97:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < primes.size(); i++) { ^ user.cpp:78:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trapeze.in","r",stdin); ^ user.cpp:79:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trapeze.out","w",stdout); ^ user.cpp:81:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^