提出 #74276912

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ソースコード 拡げる

import java.io.*;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) {
        InputReader reader = new InputReader(System.in);
        PrintWriter writer = new PrintWriter(System.out, false);
        int N = reader.nextInt();
        int[][] C = new int[N][N];
        for (int i = 0; i < N; i++) {
            for (int j = i + 1; j < N; j++) {
                C[i][j] = reader.nextInt();
            }
        }
        boolean good = false;
        for (int i = 0; i < N; i++) {
            for (int j = i + 1; j < N; j++) {
                for (int k = j + 1; k < N; k++) {
                    if (C[i][j] + C[j][k] < C[i][k]) {
                        good = true;
                        break;
                    }
                }
            }
        }
        writer.println(good ? "Yes" : "No");
        writer.close();
        System.exit(0);
    }
    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());
        }
        public long nextLong() {
            return Long.parseLong(next());
        }
        public double nextDouble() {
            return Double.parseDouble(next());
        }
        public String nextLine() {
            String str = "";
            try {
                str = reader.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
}

提出情報

ジャッジ結果