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September 23, 2019 22:20
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Leetcode 57: Insert Interval
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#include <iostream> | |
#include <vector> | |
using namespace std; | |
vector<vector<int>> insert(vector<vector<int>>& intervals, vector<int>& newInterval) { | |
vector<vector<int>> vout; | |
bool inserted = false; | |
vector<int> write(2,0); | |
for (int i=0; i<intervals.size(); ++i) { | |
if (!inserted) { | |
if (newInterval[1] < intervals[i][0]) { //newInterval before current | |
vout.push_back(newInterval); | |
vout.push_back(intervals[i]); | |
inserted = true; | |
} | |
else if (newInterval[1] >= intervals[i][0] && newInterval[1] <= intervals[i][1]) { //overlap <- | |
write[0] = min(newInterval[0], intervals[i][0]); | |
write[1] = intervals[i][1]; | |
vout.push_back(write); | |
inserted = true; | |
continue; | |
} | |
else if (newInterval[0] >= intervals[i][0] && newInterval[0] <= intervals[i][1]) { //overlap -> | |
write[0] = intervals[i][0]; | |
write[1] = max(newInterval[1], intervals[i][1]); | |
vout.push_back(write); | |
inserted = true; | |
continue; | |
} | |
else if (newInterval[0] < intervals[i][0] && newInterval[1] > intervals[i][1]) { //overlap <--> | |
vout.push_back(newInterval); | |
inserted = true; | |
continue; | |
} | |
} | |
if (vout.size()>0 && vout[vout.size()-1][1] >= intervals[i][0]) { //merge previous | |
vout[vout.size()-1][1] = max(vout[vout.size()-1][1], intervals[i][1]); | |
} | |
else // doesn't overlap, so just write out. | |
vout.push_back(intervals[i]); | |
} | |
if (!inserted) //add newInterval to end of return array | |
vout.push_back(newInterval); | |
return vout; | |
} | |
void printv(const vector<vector<int>>& v) { | |
for (auto r : v) | |
cout << "[" << r[0] << "," << r[1] << "] "; | |
cout << "\n"; | |
} | |
int main() { | |
vector<vector<int>> intervals {{0,2},{3,9}}; //{{1,2},{3,5},{6,7},{8,10},{12,16}}; //{{1,3},{6,9}}; | |
vector<int> newInterval {6,8}; //{4,8}; //{2,5}; | |
auto vals = insert(intervals, newInterval); | |
printv(vals); | |
return 0; | |
} |
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