Compilare: main.cpp: In function 'int main()': main.cpp:28:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;i++) ^~~ main.cpp:32:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' if(ok[s]==0) ^~