ENG  RUSTimus Online Judge
Online Judge
Problems
Authors
Online contests
About Online Judge
Frequently asked questions
Site news
Webboard
Links
Problem set
Submit solution
Judge status
Guide
Register
Update your info
Authors ranklist
Current contest
Scheduled contests
Past contests
Rules
back to board

Discussion of Problem 1139. City Blocks

Can't find tests to prove algorithm wrong (WA 3)
Posted by Kirill 26 Jan 2017 03:27
I wrote simple implementation but can't figure out test to prove my solution wrong.

4 3 -> 4
3 3 -> 2
4 5 -> 6
4 6 -> 7
3 8 -> 8
6 5 -> 8
6 8 -> 10

#include "stdio.h"
#include <stdlib.h>

int main(void) {
  int bigger, lesser, a, b;
  scanf("%d", &a);
  scanf("%d", &b);
  if (a >= b) {
    bigger = a - 1; lesser = b - 1;
  } else {
    bigger = b - 1; lesser = a - 1;
  }

  if (bigger % lesser == 0) {
    printf("%d\n", bigger); return 0;
  }

  printf("%d\n", bigger + lesser - 1);

  return 0;
}
Re: Can't find tests to prove algorithm wrong (WA 3)
Posted by Kirill 26 Jan 2017 16:03
Found it
7 11  -> 14
13 21 -> 16
GCD is the key ;-)
Re: Can't find tests to prove algorithm wrong (WA 3)
Posted by Ctalk3r 31 Oct 2017 01:00
13 21 -> 28