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标题: LeetCode //C - 365. Water and Jug Problem [打印本页]

作者: 立聪堂德州十三局店    时间: 2024-9-18 06:10
标题: LeetCode //C - 365. Water and Jug Problem
365. Water and Jug Problem

You are given two jugs with capacities x liters and y liters. You have an infinite water supply. Return whether the total amount of water in both jugs may reach target using the following operations:

Example 1:

   Input: x = 3, y = 5, target = 4
Output: true
Explanation:
Follow these steps to reach a total of 4 liters:
    Reference: The Die Hard example.
  Example 2:

   Input: x = 2, y = 6, target = 5
Output: false
  Example 3:

   Input: x = 1, y = 2, target = 3
Output: true
Explanation: Fill both jugs. The total amount of water in both jugs is equal to 3 now.
  Constraints:


From: LeetCode
Link: 365. Water and Jug Problem

Solution:

Ideas:


Code:

  1. // Helper function to compute the greatest common divisor
  2. int gcd(int a, int b) {
  3.     while (b != 0) {
  4.         int temp = b;
  5.         b = a % b;
  6.         a = temp;
  7.     }
  8.     return a;
  9. }
  10. bool canMeasureWater(int x, int y, int target) {
  11.     // If target is greater than the sum of both jugs, it's not possible
  12.     if (target > x + y) {
  13.         return false;
  14.     }
  15.    
  16.     // If target is zero, it's always possible (no need to fill any jug)
  17.     if (target == 0) {
  18.         return true;
  19.     }
  20.    
  21.     // Calculate the greatest common divisor of x and y
  22.     int g = gcd(x, y);
  23.    
  24.     // Check if target is a multiple of the gcd of x and y
  25.     return target % g == 0;
  26. }
复制代码
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