lizhashi0623
2017-04-19 10:33c++, vector subscript out of range 哪里有问题?
#include<iostream>
#include<vector>
#include<unordered_map>
#include<algorithm>
using namespace std;
class Solution {
public:
vector<vector<int>> For4Sum(vector<int> &nums,int target) {
vector<vector<int>> result;
unordered_map<int,vector<pair<int,int>>> map;
sort(nums.begin(), nums.end());
if (nums.size() < 4) return result;
for (int i = 0; i < nums.size()-1; i++) {
for (int j = i + 1; j < nums.size(); i++) {
map[nums[i]+nums[j]].push_back(pair<int,int>(i,j));
}
}
for (int i = 0; i < nums.size() - 1; i++) {
for (int j = 0; j < nums.size(); i++) {
int key = target - nums[i] - nums[j];
if (map.find(key) != map.end()) {
for (int k = 0; k < map[key].size(); k++) {
if (i < map[key][k].first) {
result.push_back({ nums[i], nums[j], nums[map[key][k].first],nums[map[key][k].second] });
}
}
}
}
}
sort(result.begin(), result.end());
result.erase(unique(result.begin(),result.end()),result.end());
return result;
}
};
int main() {
Solution a;
vector<int> test;
int target;
int temp = 0;
cout << "input target" << endl;
cin >> target;
cout << "input nums" << endl;
while (cin >> temp) {//ctrl+z
test.push_back(temp);
}
vector<vector<int>> result;
result=a.For4Sum(test, target);
for (int i = 0; i < result.size(); i++) {
for (int j = 0; j < result[i].size(); j++)
cout << result[i][j] << " " << endl;
cout << endl;
}
system("pause");
return 0;
}
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