Package g2101_2200.s2103_rings_and_rods

Class Solution

java.lang.Object

g2101_2200.s2103_rings_and_rods.Solution

public class Solution
extends Object

2103 - Rings and Rods\. Easy There are `n` rings and each ring is either red, green, or blue. The rings are distributed **across ten rods** labeled from `0` to `9`. You are given a string `rings` of length `2n` that describes the `n` rings that are placed onto the rods. Every two characters in `rings` forms a **color-position pair** that is used to describe each ring where: * The **first** character of the ith pair denotes the ith ring's **color** (`'R'`, `'G'`, `'B'`). * The **second** character of the ith pair denotes the **rod** that the ith ring is placed on (`'0'` to `'9'`). For example, `"R3G2B1"` describes `n == 3` rings: a red ring placed onto the rod labeled 3, a green ring placed onto the rod labeled 2, and a blue ring placed onto the rod labeled 1. Return _the number of rods that have **all three colors** of rings on them._ **Example 1:**  **Input:** rings = "B0B6G0R6R0R6G9" **Output:** 1 **Explanation:** - The rod labeled 0 holds 3 rings with all colors: red, green, and blue. - The rod labeled 6 holds 3 rings, but it only has red and blue. - The rod labeled 9 holds only a green ring. Thus, the number of rods with all three colors is 1. **Example 2:**  **Input:** rings = "B0R0G0R9R0B0G0" **Output:** 1 **Explanation:** - The rod labeled 0 holds 6 rings with all colors: red, green, and blue. - The rod labeled 9 holds only a red ring. Thus, the number of rods with all three colors is 1. **Example 3:** **Input:** rings = "G4" **Output:** 0 **Explanation:** Only one ring is given. Thus, no rods have all three colors. **Constraints:** * `rings.length == 2 * n` * `1 <= n <= 100` * `rings[i]` where `i` is **even** is either `'R'`, `'G'`, or `'B'` ( **0-indexed** ). * `rings[i]` where `i` is **odd** is a digit from `'0'` to `'9'` ( **0-indexed** ).

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	countPoints(String rings)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

countPoints

public int countPoints(String rings)