#include <iostream>

using namespace std;

int main() {
    int n, m, k;
    cin >> n >> m >> k;

    int a[n];
    for (int i = 0; i < n; ++i) {
        a[i] = i + 1;
    }

    for (int i = 0; i < m; ++i) {
        int x, y;
        cin >> x >> y;

        int nr = 0;
        for (int j = 0; j < n; ++j) {
            if (j < x - 1 || j > y - 1) {
                a[nr] = a[j];
                nr++;
            }
        }
        n = nr;
    }

    cout << a[k - 1] << endl;

    return 0;
}