若干有序合并成依然有序的序列

#if 1
#include <iostream>
#include <string>
#include <cstdio>
#include <cstdlib>
#include <sstream>
#include <iostream>
#include <string>
#include <vector>
#include <list>
#include <iostream>
#include <algorithm>
#include <numeric>
#include <cstdlib>
#include <cstdio>
#include<stack>
#include <string>
#include <set>
#include <sstream>
#include <iterator>
using namespace std;
vector<int> MergeList(vector<int>  list1, vector<int>  list2){
    vector<int> result;
    int i = 0, j = 0;
    for (; i < list1.size() && j < list2.size();){
        if (list1[i] < list2[j]){
            result.push_back(list1[i]);
                i++;
        }
        else{
            result.push_back(list2[j]);
            j++;
        }
    }

    while (i < list1.size()){
        result.push_back(list1[i]);
            i++;
    }

    while (j < list2.size()){
        result.push_back(list2[j]);
        j++;
    }

    return result;
}
vector<int>* Merge(vector<vector<int>> vect){
    vector<int> result;
    if (vect.size() < 1)
        return NULL;
    result = vect[0];
    for (int i = 1; i< vect.size(); i++){
        result = MergeList(result, vect[i]);
    }
    return &result;
}

vector<int> Merge1(vector<vector<int>>& vect){
    vector<int> result,result1;
    if (vect.size() < 1)
        return result;
    result = vect[0];
    
    for (int i = 1; i < vect.size(); i++){
        result1.resize(vect[i].size() + result.size());
        merge(vect[i].begin(), vect[i].end(), result.begin(), result.end(), result1.begin());
        result = result1;
    }
    return result;
}

vector<int> testSplit(string srcStr, const string& delim)
{
    int nPos = 0;
    vector<int> vec;
    nPos = srcStr.find(delim.c_str());
    while (-1 != nPos)
    {
        string temp = srcStr.substr(0, nPos);
        vec.push_back(stoi(temp));
        srcStr = srcStr.substr(nPos + 1);
        nPos = srcStr.find(delim.c_str());
    }
    vec.push_back(stoi(srcStr));
    for (auto i:vec)
    {
        cout << i << endl;
    }
    return vec;
}
int main()
{
    int num = 0, b = 0;
    string name,subname;
    cin >> num;
    vector<vector<int>> vvi(num);
    cin.ignore(199, '
');
    for (int i = 0;i <num;i++)
    {
        getline(cin, name);
        vvi[i]=testSplit(name,",");
        //cin.ignore(199, '
');
    }
    for (int i = 0; i < vvi.size();i++)
    {
        for (int j = 0; j < vvi[i].size();j++)
        {
            cout << vvi[i][j] << " ";
        }
        cout << endl;
    }
    vector<int> vi=Merge1(vvi);
    for (auto v:vi)
    {
        cout << v << " ";
    }
    cout << endl;
    system("pause");
}
#endif