Compilare: main.cpp: In function 'int main()': main.cpp:27:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;i++) ^~~ main.cpp:33:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' s=0; ^ main.cpp:49:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(r&&f==0) ^