Compilare: user.cpp: In function ‘void merge_it(int, int, int)’: user.cpp:34:11: warning: left operand of comma operator has no effect [-Wunused-value] for(i,j,poz;i<=mij&&j<=dr;poz++) ^ user.cpp:34:13: warning: right operand of comma operator has no effect [-Wunused-value] for(i,j,poz;i<=mij&&j<=dr;poz++) ^ user.cpp:34:16: warning: right operand of comma operator has no effect [-Wunused-value] for(i,j,poz;i<=mij&&j<=dr;poz++) ^ user.cpp:48:10: warning: statement has no effect [-Wunused-value] for(i;i<=mij;i++,poz++) ^ user.cpp:50:10: warning: statement has no effect [-Wunused-value] for(j;j<=dr;j++,poz++) ^ user.cpp: In function ‘double solve(int, int)’: user.cpp:80:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<f.size();i++) ^