#include <iostream>
#include <algorithm>
#include <functional>
#include <cstdlib>
#include <sstream>
#include <string>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <complex>
#include <vector>
#include <bitset>
#include <cstdio>
#include <cmath>
#include <time.h>
#include <tuple>
#define all(c) ((c).begin(),(c).end())
#define rall(c) ((c).rbegin(),(c).rend())
#define ll long long
#define fi first
#define se second
#define inf (999999999)
using namespace std;
const ll MOD = 1e9 + 7;
const double PI = acos(-1.0);
//---------------------------------------------------------------------------------------------//
int n;
int v[101], w[101];
int vv;
int dp[101][100001];
int main() {
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> v[i] >> w[i];
	}
	cin >> vv;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j <= 100000; j++) {
			if (j + w[i] > 100000)continue;
				dp[i + 1][j + w[i]] = max(dp[i][j] + v[i], dp[i + 1][j + w[i]]);
				dp[i + 1][j] = max(dp[i + 1][j], dp[i][j]);
		}
	}
	vector<int> vi;
	for (int i = 0; i < 100000; i++) {
		if (dp[n][i] == vv) {
			vi.push_back(i);
		}
	}
	sort(vi.begin(), vi.end());
	if (vi[0] == 0) {
		cout << 1 << endl;
	}
	else {
		cout << vi[0] << endl;
	}
	((vi[vi.size() - 1] == 99999) ? cout << "inf" << endl : cout << vi[vi.size() - 1] << endl);
}