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think_tank_vs.mroyme

Sum of multiples of 3 or 5

Code
Diff
  • package kata

func IntegerSum(n int) (sum int) {
  sum = n * (n+1) / 2
  return
}

func AddMultiples(n int) (sum int) {
  sum = IntegerSum((n-1)/3) * 3 + IntegerSum((n-1)/5) * 5 - IntegerSum((n-1)/15) * 15
  return 
}
    • package kata
    • func AddMultiples(n int) (sum int) {
    • for i := 1; i < n; i++ {
    • if i % 3 == 0 || i % 5 == 0 {
    • sum += i
    • }
    • }
    • func IntegerSum(n int) (sum int) {
    • sum = n * (n+1) / 2
    • return
    • }
    • func AddMultiples(n int) (sum int) {
    • sum = IntegerSum((n-1)/3) * 3 + IntegerSum((n-1)/5) * 5 - IntegerSum((n-1)/15) * 15
    • return
    • }
think_tank_vs.cyberninja2004

Numbers Divided by 2

Code
Diff
  • unsigned long long div2(unsigned long long a){
  
  return a >> 1;
}
    • unsigned long long div2(unsigned long long a){
    • return a * 5 / 10;
    • return a >> 1;
    • }
think_tank_vs.cyberninja2004

Leap Year

Code
Diff
  • bool isLeap(long n) {
    return (n % 4 == 0 && n % 100 != 0) || (n % 400 == 0);
}
    • bool isLeap(long n) {
    • if ((n % 4 == 0 && n % 100 != 0) || (n % 400 == 0))
    • return true;
    • return false;
    • return (n % 4 == 0 && n % 100 != 0) || (n % 400 == 0);
    • }