Compilare: user.cpp: In function ‘int main()’: user.cpp:21:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x==v[2][i])a=i; ^ user.cpp:14:36: warning: array subscript is above array bounds [-Warray-bounds] if(sd=='S'){v[1][--s]=x;v[2][s]=i;} ^ user.cpp:15:30: warning: array subscript is above array bounds [-Warray-bounds] else {v[1][++d]=x;v[2][d]=i;} ^ user.cpp:21:18: warning: array subscript is above array bounds [-Warray-bounds] if(x==v[2][i])a=i; ^