Submission #1073883

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Source Code Expand

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

/**
 * @author Pavel Mavrin
 */
public class Main {

    private void solve() throws IOException {
        int n = nextInt();
        long[] a = new long[n];
        long[] b = new long[n];

        for (int i = 0; i < n; i++) {
            a[i] = nextInt();
            b[i] = nextInt();
        }

        long res = 0;
        for (int i = n - 1; i >= 0; i--) {
            long q = -(a[i] + res);
            q %= b[i];
            if (q < 0) q += b[i];
            res += q;
        }

        out.println(res);
    }

    // ------------------

    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st;
    PrintWriter out = new PrintWriter(System.out);

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

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

    public static void main(String[] args) throws IOException {
        new Main().run();
    }

    private void run() throws IOException {
        solve();
        out.close();
    }

}

Submission Info

Judge Result