Compilare: main.cpp: In function 'int main()': main.cpp:49:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(i=0;i<vec.size();i++) | ~^~~~~~~~~~~ main.cpp:17:9: warning: unused variable 'n' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^ main.cpp:17:13: warning: unused variable 'j' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^ main.cpp:17:15: warning: unused variable 'k' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^ main.cpp:17:17: warning: unused variable 'l' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^ main.cpp:17:19: warning: unused variable 'x' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^ main.cpp:17:21: warning: unused variable 'nr' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^~ main.cpp:17:24: warning: unused variable 'suma' [-Wunused-variable] 17 | int n,i,j,k,l,x,nr,suma=0,a,b,prod,curr; | ^~~~