Compilare: main.cpp: In function 'int main()': main.cpp:37:14: warning: unused variable 'x' [-Wunused-variable] int n,vi,x,i,s=0; ^ main.cpp:37:18: warning: unused variable 's' [-Wunused-variable] int n,vi,x,i,s=0; ^ main.cpp: In function 'int solve()': main.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^