Compilare: user.cpp: In function ‘int f(int, int)’: user.cpp:10:41: warning: value computed is not used [-Wunused-value] else if (a[i]==b[i]*2 || a[i]>b[i]*2) 1+f(n,i+a[i]); ^ user.cpp: At global scope: user.cpp:14:7: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main () ^ user.cpp: In function ‘int main()’: user.cpp:16:8: warning: unused variable ‘s’ [-Wunused-variable] int n, s, k, i, p, c=3; ^ user.cpp: In function ‘int f(int, int)’: user.cpp:13:1: warning: control reaches end of non-void function [-Wreturn-type] } ^