Compilare: user.cpp: In function ‘int solve()’: user.cpp:103:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (ans + step <= en) ^ user.cpp: In function ‘int main()’: user.cpp:128:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < norm.size(); i++) M[norm[i]] = i; ^ user.cpp:115:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mediana.out", "w", stdout); ^