add: 跳跃游戏 II

This commit is contained in:
2020-05-04 13:43:56 +08:00
parent c5f7255d3a
commit b806ec7959
3 changed files with 30 additions and 0 deletions

20
src/array/jump-game-ii.js Normal file
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/**
* @param {number[]} nums
* @return {number}
*/
export const jump = function (nums) {
let step = 0 // 跳跃步数
let maxPosition = 0 // 最大位置
let lastJumpStepMax = 0 // 最后一次跳跃最大能跳的步数
for (let n = 0, len = nums.length; n < len - 1; n++) {
maxPosition = Math.max(maxPosition, nums[n] + n)
if (lastJumpStepMax === n) { // 从当前位置开始,到当前能跳的位置这个区间,谁最大,就选谁,并跳一次
lastJumpStepMax = maxPosition
step++
}
if (lastJumpStepMax > len) return step
}
return step
}