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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. vector<int> twoSum(vector<int>& nums, int target) {
  4.     map<int, int> indexMap;
  5.     vector<int> result;
  6.     int n = nums.size();
  7.     for(int i = 0; i < n; i++){
  8.         if(indexMap.find(nums[i] - target) != indexMap.end()){
  9.             result.push_back(indexMap[nums[i]]);
  10.             result.push_back(i);
  11.         } else{
  12.             indexMap[nums[i]] = i;
  13.         }
  14.     }
  15.     return result;
  16. }
  17. int main() {
  18. 	map<int, int> indexMap;
  19.     vector<int> result, nums(4);
  20.     nums[0] = 3; nums[1] = 2; nums[2] = 6; nums[3] = 5;
  21.     int target = 5;
  22.     int n = nums.size();
  23.     for(int i = 0; i < n; i++){
  24.         if(indexMap.find(target - nums[i]) != indexMap.end()){
  25.             result.push_back(indexMap[nums[i]]);
  26.             result.push_back(i);
  27.             cout << indexMap[target - nums[i]] << " " << i << endl;
  28.             break;
  29.         } else{
  30.             indexMap[nums[i]] = i;
  31.         }
  32.     }
  33. 	return 0;
  34. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/O74qFR
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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