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  1. Prepare
  2. C++
  3. Introduction
  4. Variable Sized Arrays
  5. Discussions

Variable Sized Arrays

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1466 Discussions

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  • ahmed_m_taha01
     + 0 comments
    

    cin >> n >> q;
int** arr = new int*[n];
for(unsigned int h = 0; h < n; ++h)
{
    cin >> k;
    *(arr + h) = new int[k];
    for(unsigned m = 0; m < k; ++m) {cin >> *(*(arr + h)+ m);}
}
for(unsigned int h = 0; h < q; h++){cin >>i >>j; cout << *(*(arr + i)+ j) << endl;}

  • londonbellmarcv1
     + 0 comments

    Here is my code

    include

    include

    include

    include

    include

    using namespace std;

    int main() {

    int n ;
cin >> n;
int q ;
cin >> q;
vector<vector<int>> arr(n);  

for (int i = 0; i < n; i++) {
    int k ;
    cin >> k;

    arr[i].resize(k);

    for (int j = 0; j < k; j++) {
        cin >> arr[i][j];
    }
}

for (int j = 0 ; j < q ; j++) {
    int x, y ;
    cin >> x >> y;
    cout << arr[x][y] << endl;
}
return 0;

    }

  • patrickgao2020
     + 0 comments

    Here is my code!

    #include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int num_arrays, num_queries, num_items, current_item, array_i, item_i;
    vector<int> current_array;
    scanf("%d %d", &num_arrays, &num_queries);
    vector<vector<int>> arrays;
    for (int i = 0; i < num_arrays; i++) {
        current_array = {};
        scanf("%d", &num_items);
        for (int item = 0; item < num_items; item++) {
            scanf("%d", &current_item);
            current_array.push_back(current_item);
        }
        arrays.push_back(current_array);
    }
    for (int i = 0; i < num_queries; i++) {
        scanf("%d %d", &array_i, &item_i);
        printf("%d", arrays[array_i][item_i]);
        if (i != num_queries - 1) {
            printf("\n");
        }
    }
    return 0;
}

  • akshaykandasamy1
     + 0 comments

    include

    include

    include

    include

    include

    using namespace std;

    int main() { int n; int q; cin>>n; cin>>q; vector > vec; for(int i{0};i v; cin>>a; for(int j{0};j>b; v.push_back(b); } vec.push_back(v); } for(int k{0};k>c; cin>>d; vector temp=vec[c]; int h=temp[d]; cout< 

    }  
return 0;

    }

  • Migueel0
     + 2 comments
    int main() {
    int n,q;
    cin >> n >> q;
    vector<vector<int>> v;
    
    for(int i=0;i<n;i++){
        int len;
        cin >> len;
        vector<int> arr;
        for(int j=0;j<len;j++){
            int num;
            cin >> num;    
            arr.push_back(num);
        }
        v.push_back(arr);
    }
    
    for(int i = 0; i < q; i++){
        int a;
        int b;
        cin >> a >> b;
        cout << v[a][b] << endl;
    }

    return 0;
}