Compilare: user.cpp: In function ‘std::pair<int, int> getDifferences(int, int)’: user.cpp:49:68: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if ( ((conf_1 & (1 << i)) > 0) ^ ((conf_2 & (1 << i)) > 0) == 1){ ^ user.cpp: In function ‘int main()’: user.cpp:88:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int b_ind = 0; b_ind < boys.size(); b_ind++) { ^ user.cpp:90:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int g_ind = 0; g_ind < girls.size(); g_ind++) { ^ user.cpp:62:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volei.in","r",stdin); ^ user.cpp:63:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("volei.out","w",stdout); ^ user.cpp:65:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lf",&n,&distLimit); ^ user.cpp:68:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %c\n",&xx,&yy,&gender); ^