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AhkunTa
Arithmetic
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LeetCode
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57_javascript.js
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master
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Arithmetic
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LeetCode
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57_javascript.js
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// 给出一个无重叠的 ,按照区间起始端点排序的区间列表。
// 在列表中插入一个新的区间,你需要确保列表中的区间仍然有序且不重叠(如果有必要的话,可以合并区间)。
//
// 示例 1:
// 输入:intervals = [[1,3],[6,9]], newInterval = [2,5]
// 输出:[[1,5],[6,9]]
// 示例 2:
// 输入:intervals = [[1,2],[3,5],[6,7],[8,10],[12,16]], newInterval = [4,8]
// 输出:[[1,2],[3,10],[12,16]]
// 解释:这是因为新的区间 [4,8] 与 [3,5],[6,7],[8,10] 重叠。
/**
* @param {number[][]} intervals
* @param {number[]} newInterval
* @return {number[][]}
*/
// 同 56题
var insert = function (intervals, newInterval) {
intervals.push(newInterval);
intervals.sort((a, b) => a[0] - b[0]);
let res = [intervals[0]];
// let right =
for (let i = 0; i < intervals.length; i++) {
let head = intervals[i][0];
let tail = intervals[i][1];
if (head <= res[res.length - 1][1]) {
res[res.length - 1][1] = Math.max(res[res.length - 1][1], tail);
} else {
res.push(intervals[i]);
}
}
return res;
};
// 使用双指针
var insert = function (intervals, newInterval) {
intervals.push(newInterval);
// 排序
intervals.sort((a, b) => a[0] - b[0]);
let res = [];
let left, right;
for (let i = 0; i < intervals.length; i++) {
let j = i + 1;
right = intervals[i][1];
left = intervals[i][0];
while (j < intervals.length && intervals[j][0] <= right) {
right = Math.max(intervals[j][1], right);
j++;
}
res.push([left, right]);
// 当while循环不满足时 j多加了1 此处减去
i = j - 1;
}
return res;
};
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