#include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, k, r[1000], c[1000], min[1000], sum = 0;     cin >> n >> m >> k;     for (int i = 0; i < n; i++) {       cin >> r[i] >> c[i];       min[i] = 9999999999;     }     for (int i = 0; i < n; i++)       if (min[r[i] - 1] > c[i]) min[r[i] - 1] = c[i];     for (int i = 0; i < m; i++) sum += min[i];     if (sum > k)       cout << k;     else       cout << sum;   }   