#include <bits/stdc++.h>
using namespace std;
#define int long long
int n, V;
int v[114], w[114];
int sumv;
int dp[114514];
int maxw;

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++i)
    {
        cin >> v[i] >> w[i];
        maxw += w[i];
        sumv += v[i];
    }

    cin >> V;

    for (int i = 1; i <= n; ++i)
    {
        for (int j = maxw; j >= w[i]; --j)
        {
            if (j >= w[i])
                dp[j] = max(dp[j], dp[j - w[i]] + v[i]);
        }
    }

    for (int j = 1; j <= maxw; ++j)
    {
        if (dp[j] == V)
        {
            cout << j << '\n';
            break;
        }
    }
    if (V == sumv)
    {
        cout << "inf";
    }
    else
        for (int j = maxw; j >= 0; --j)
        {
            if (dp[j] == V)
            {
                cout << j << '\n';
                break;
            }
        }

    return 0;
}