import java.io.*;
import java.util.*;
import java.math.*;

public class Main {
    static BufferedReader in;
    static StringTokenizer strtok;

    static String next() throws IOException {
        while (strtok == null || !strtok.hasMoreTokens())
            strtok = new StringTokenizer(in.readLine());
        return strtok.nextToken();
    }

    static int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    static long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    static double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }
    static long a, b, c;

    static BigInteger sum2(long n) {
        --n;
        return BigInteger.valueOf(n).multiply(BigInteger.valueOf(n + 1)).multiply(BigInteger.valueOf(2 * n + 1)).divide(BigInteger.valueOf(6));
    }

    static BigInteger sum(long n) {
            return BigInteger.valueOf(n - 1).multiply(BigInteger.valueOf(n)).divide(BigInteger.valueOf(2));
    }
    static boolean Ok(long n) {
        BigInteger va = BigInteger.valueOf(a);
        BigInteger vb = BigInteger.valueOf(b);
        BigInteger vc = BigInteger.valueOf(c);

        BigInteger vn = BigInteger.valueOf(n);
        BigInteger A, B, C;
        A = vn.multiply(va);
        B = vn.multiply(vb).add(va.multiply(BigInteger.valueOf(2).multiply(sum(n))));
        C = va.multiply(sum2(n)).add(vb.multiply(sum(n))).add(vn.multiply(vc));
        return B.multiply(B).subtract(BigInteger.valueOf(4).multiply(A).multiply(C)).compareTo(BigInteger.ZERO) < 0;

    }

    public static void main(String args[]) throws IOException {
        in = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(System.out);
        int tests = nextInt();
        for (int test = 1; test <= tests; ++test) {
            a = nextLong();
            b = nextLong();
            c = nextLong();
            long le = 0, ri = (long)1e18;
            while (ri - le > 1) {
                long mid = (le + ri) / 2;
                if (Ok(mid)) ri = mid; else
                le = mid;
            }
            if (!Ok(ri)) out.println("Infinity"); else
            out.println(ri);
        }
        out.close();
    }
}