Compilare: main.cpp: In function 'int main()': main.cpp:14:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1; i<=n; i++) ^~~ main.cpp:30:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' int ok=1; ^~~ main.cpp:30:13: warning: variable 'ok' set but not used [-Wunused-but-set-variable] int ok=1; ^~