Compilare: main.cpp: In function 'int facebook(int, int, int*, int*)': main.cpp:18:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:23:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;i++) ^~~ main.cpp:25:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(int i=1;i<=n;i++) ^~~