Dev - C++ - Necesito ayuda porfa :(

#include <iostream>

#include <vector>

using namespace std;

int main() {

    int n1,n2,t1,t2;

    int i;

    vector <int> v1;

    vector <int> v2;

    do {

        cout << "Ingrese tamaño del vector 1: ";

        cin >> t1;

        cout << "Ingrese tamaño del vector 2: ";

        cin >> t2;

        if (t1 != t2)

            cout << "Error, los vectores deben ser del mismo tamaño\n";

    } while (t1 != t2);

    //Primer vector

    cout << "\nIngrese los " << t1 << " elementos del 1er vector" << endl;

    for (i=0; i<t1; i++) {

        cout << "Ingrese elemento: ";

        cin >> n1;

        v1.push_back(n1);

    }

    //Segundo vector

    cout << "\nIngrese los " << t2 << " elementos del 2do vector" << endl;

    for (i=0; i<t2; i++) {

        cout << "Ingrese elemento: ";

        cin >> n2;

        v2.push_back(n2);

    }

    //Mostrar v1

    cout << "\nVector 1 = ";

    for (auto i : v1)

        cout << i << " ";

    //Mostrar v2

    cout << "\nVector 2 = ";

    for (auto i : v2)

        cout << i << " ";

    //Suma de v3 = v1 + v2

    int v3[t1];

    for (i=0; i<t1; i++)

        v3[i] = v1[i] + v2[i];

    //Mostrar v3

    cout << "\n\nVector 3 = ";

    for (i=0; i<t1; i++)

        cout << v3[i] << " ";

    //Resta de v3 = v1 - v2

    for (i=0; i<t1; i++)

        v3[i] = v1[i] - v2[i];

    //Mostrar v3

    cout << "\nVector 3 = ";

    for (i=0; i<t1; i++)

        cout << v3[i] << " ";

    return 0;

}