Compilare: main.cpp: In function 'int main()': main.cpp:46:7: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i = 1; i <= n; i++) out << a[i] << " "; out << "\n"; ^~~ main.cpp:46:52: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for (i = 1; i <= n; i++) out << a[i] << " "; out << "\n"; ^~~ main.cpp:25:15: warning: unused variable 'f' [-Wunused-variable] {ll i,j,big_m,f,nr1,nr2,nr3,pp = 1; ^ main.cpp:25:29: warning: variable 'pp' set but not used [-Wunused-but-set-variable] {ll i,j,big_m,f,nr1,nr2,nr3,pp = 1; ^~