Compilare: main.cpp: In function 'void Check(double, double, double, double)': main.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < H[hf].size(); ++i ) ~~^~~~~~~~~~~~~~ main.cpp:79:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < H[hf].size(); ++i ) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:110:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < V.size(); ++i ) ~~^~~~~~~~~~ main.cpp:111:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = i + 1; j < V.size(); ++j ) ~~^~~~~~~~~~ main.cpp:114:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < V.size(); ++i ) ~~^~~~~~~~~~ main.cpp:115:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = i + 1; j < V.size(); ++j ) { ~~^~~~~~~~~~ main.cpp:116:17: warning: unused variable 'old' [-Wunused-variable] int old = cnt; ^~~