没有指针的C分段错误(HackerRank)

Input Format. The first line of the input contains an integer N.The next line contains N space separated integers.The third line contains a single integer x,denoting the position of an element that should be removed from the vector.The fourth line contains two integers a and b denoting the range that should be erased from the vector inclusive of a and exclusive of b.

Output Format. Print the size of the vector in the first line and the elements of the vector after the two erase operations in the second line separated by space.

码：

#include <vector>
#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int main() {
    int n = 0,x = 0,value = 0;
    vector<int> vk,vm;
    vk.reserve(100000);
    string k,m;

    cin >> n;
    cin.ignore();
    getline(cin,k);
    cin >> x;
    cin.ignore();
    getline(cin,m);

    stringstream sk(k);
    while (sk >> value)
        vk.push_back(value);

    stringstream sm(m);
    while (sm >> value)
        vm.push_back(value);

    vk.erase(vk.begin() + x-1);
    vk.erase(vk.begin() + vm[0]-1,vk.begin() + vm[1]-1);

    cout << vk.size() << endl;
    for (int i = 0; i < vk.size(); i++)
        cout << vk[i] << " ";

    cout << endl;
    return 0;
}

但是这个测试用例会产生“分段错误”：

6
1 4 6 2 8 9
2
2 4

你能帮我看看我的代码并提供一些关于问题的反馈吗？

编辑

Thanks to @john for the answer. Here is how it looks without the seg fault:

#include <vector>
#include <iostream>
#include <string>
using namespace std;

int main() {
    int n = 0,y = 0,z = 0,value = 0;
    vector<int> vk;
    vk.reserve(100000);

    cin >> n;
    for (int i = 0; i < n; ++i) {
        cin >> value;
        vk.push_back(value);
    }
    cin >> x >> y >> z;

    vk.erase(vk.begin() + x-1);
    vk.erase(vk.begin() + y-1,vk.begin() + z-1);

    cout << vk.size() << endl;
    for (int i = 0; i < vk.size(); i++)
        cout << vk[i] << " ";

    cout << endl;
    return 0;
}