Compilare: user.cpp: In function ‘int Search(int)’: user.cpp:26:7: warning: unused variable ‘i’ [-Wunused-variable] { int i,st=1,dr=act,mid; ^ user.cpp: In function ‘void SolveTwo()’: user.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<val[i].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:73:7: warning: unused variable ‘i’ [-Wunused-variable] { int i; ^