57. Insert Interval
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Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).
You may assume that the intervals were initially sorted according to their start times.
Example 1:
Input: intervals = [[1,3],[6,9]], newInterval = [2,5] Output: [[1,5],[6,9]]
Example 2:
Input: intervals =[[1,2],[3,5],[6,7],[8,10],[12,16]]
, newInterval =[4,8]
Output: [[1,2],[3,10],[12,16]] Explanation: Because the new interval[4,8]
overlaps with[3,5],[6,7],[8,10]
.
AC code:
/** * Definition for an interval. * struct Interval { * int start; * int end; * Interval() : start(0), end(0) {} * Interval(int s, int e) : start(s), end(e) {} * }; */ class Solution { public: vector<Interval> insert(vector<Interval>& intervals, Interval newInterval) { intervals.push_back(newInterval); sort(intervals.begin(), intervals.end(), [](Interval& a, Interval& b) { return a.start < b.start; }); vector<Interval> ans; for (const auto interval : intervals) { if (ans.empty() || ans.back().end < interval.start) { ans.push_back(interval); } else { ans.back().end = max(ans.back().end, interval.end); } } return ans; } };
Runtime: 12 ms, faster than 50.31% of C++ online submissions for Insert Interval.
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