Compilare: user.cpp: In function ‘int sol(int)’: user.cpp:86:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < comp.size(); ++i) ^ user.cpp:54:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int main()’: user.cpp:122:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zapezi2.in", "r", stdin); ^ user.cpp:123:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zapezi2.out", "w", stdout); ^