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13thSep.cpp
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13thSep.cpp
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class Solution {
public:
vector<vector<int>> insert(vector<vector<int>>& intervals, vector<int>& newInterval) {
int n = intervals.size();
if (n == 0) // edge case #1: no intervals in original list
return {newInterval};
if (intervals[n-1][1] < newInterval[0]) { // edge case #2: new interval goes in the end of the list with no overlap
intervals.push_back(newInterval);
return intervals;
}
vector<vector<int>> res;
int i = 0;
for(; i<n; i++) {
if (intervals[i][1] < newInterval[0]) // new interval doesn't overlap
res.push_back(intervals[i]);
else {
int first = min(intervals[i][0], newInterval[0]);
int last = newInterval[1];
while (i < n && last >= intervals[i][0]) { // while new interval overlaps:
last = max(intervals[i][1], newInterval[1]);
i++;
}
res.push_back({first, last});
break;
}
}
while (i < n) { // add the rest
res.push_back(intervals[i]);
i++;
}
return res;
}
};