Submission #2410261

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Source Code Expand

using System;

public class Hello
{
    public static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        var a = new long[n];
        var b = new long[n];
        for (long i = n - 1; i >= 0; i--)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            a[i] = long.Parse(line[0]);
            b[i] = long.Parse(line[1]);
        }
        Console.WriteLine(getAns(a, b));
    }
    public static long getAns(long[] a, long[] b)
    {
        var n = a.Length;
        var ret = getB(a[0], b[0]);
        for (long i = 1; i < n; i++) ret += getB(a[i] + ret, b[i]);
        return ret;
    }
    public static long getB(long a, long b)
    {
        if (b >= a) return b - a;
        else return ((a + b - 1) / b) * b - a;
    }
}

Submission Info

Judge Result