Submission #170104

#	Time	Username	Problem	Language	Result	Execution time	Memory
170104		ijxjdjd	Remittance (JOI19_remittance)	Java	100 / 100	977 ms	120336 KiB

remittance

import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;
 
/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author ijxjdjd
 */
public class remittance {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        InputReader in = new InputReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        remittanc solver = new remittanc();
        solver.solve(1, in, out);
        out.close();
    }
 
    static class remittanc {
        public void solve(int testNumber, InputReader in, PrintWriter out) {
            int N = in.nextInt();
            long last = 0;
            long max = 0;
            long[] A = new long[N];
            long[] B = new long[N];
            for (int i = 0; i < N; i++) {
                A[i] = in.nextInt();
                B[i] = in.nextInt();
            }
            boolean first = true;
//        while (last > 0 || first) {
            for (int j = 0; j < 20; j++) {
                for (int i = 0; i < N; i++) {
                    if (A[i] > B[i]) {
                        if (A[i] - 2 * ((A[i] - B[i] + 1) / 2) < 0) {
                            continue;
                        }
                        last = ((A[i] - B[i]) + 1) / 2;
                        A[i] -= last * 2;
                    } else {
                        last = 0;
                    }
                    A[(i + 1) % N] += last;
                }
//            }
            }
            for (int i = 0; i < N; i++) {
                if (A[i] != B[i]) {
                    out.println("No");
                    return;
                }
            }
            out.println("Yes");
        }
 
    }
 
    static class InputReader {
        public BufferedReader reader;
        public StringTokenizer tokenizer;
 
        public InputReader(InputStream stream) {
            reader = new BufferedReader(new InputStreamReader(stream), 32768);
            tokenizer = null;
        }
 
        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }
 
        public int nextInt() {
            return Integer.parseInt(next());
        }
 
    }
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45