Compilare: user.cpp: In function ‘int main()’: user.cpp:79:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < Sol.size(); i++ ) { ^ user.cpp:82:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < Sol[i].size(); j++ ) { ^ user.cpp: In function ‘int dblcmp(double, double)’: user.cpp:34:1: warning: control reaches end of non-void function [-Wreturn-type] } ^