fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n, target;
  6.     cin >> n;
  7.     vector<int> nums(n);
  8.     for(int i = 0; i < n; i++) cin >> nums[i];
  9.      cin >> target;
  10.     int first = -1, last = -1;
  11.     int l = 0, r = n - 1;
  12.     while(l <= r) {
  13.         int mid = (l + r) / 2;
  14.         if(nums[mid] >= target) {
  15.             if(nums[mid] == target) first = mid;
  16.             r = mid - 1;
  17.         } else {
  18.             l = mid + 1;
  19.         }
  20.     }
  21.     l = 0; r = n - 1;
  22.     while(l <= r) {
  23.         int mid = (l + r) / 2;
  24.         if(nums[mid] <= target) {
  25.             if(nums[mid] == target) last = mid;
  26.             l = mid + 1;
  27.         } else {
  28.             r = mid - 1;
  29.         }
  30.     }
  31.  
  32.     cout << first << " " << last << endl;
  33.     return 0;
  34. }
  35.  
  36.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
 6
5 7 7 8 8 10
8
stdout
copy 
3 4
https://ideone.com/WzZ7eq
[5,7,7,8,8,10]
language:
C++ (gcc 8.3)
created:
8 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!