What Will Be The Output Of The Following Code In Cp Pre Langcpp #1105

 #include <stdio.h> int ETF(int n) { int a, result = n; for (a = 2; a * a <= n; ++a) { if (n % a == 0) { while (n % a == 0) n = n / a; result = result - result / a; } } if (n > 1) result = result - result / n; return result; } int main() { int n; for (n = 1; n <= 4; n++) printf("%d\n", ETF(n)); return 0; }