Submission #469424

#	Time	Username	Problem	Language	Result	Execution time	Memory
469424		ImaginaryIQ	Knapsack (NOI18_knapsack)	Java	Compilation error	0 ms	0 KiB

knapsack

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

public class Main {

    static int s, n;
    static int [][] arr;
    static int [][] dp; // dp[i][j][k] = the maximmum amount of value that we can using the first i items,
    // without exceeding weight j, while picking a max of k times
    public static void main(String[] args) throws Exception {
        Scanner io = new Scanner(System.in);
        s = io.nextInt();
        n = io.nextInt();

        arr = new int[n+1][3]; // v, w, count
        dp = new int[n+1][s+1];

        for (int i = 1; i <= n; i++) {
            arr[i][0] = io.nextInt(); // value, weight, and, number of picks
            arr[i][1] = io.nextInt();
            arr[i][2] = io.nextInt();
        }
        
        for (int i = 1; i <= n; i++) {
            for (int j = 0; j <= s; j++) {
                dp[i][j] = dp[i-1][j];

                // go back the number of times taken
                for (int k = 1; k <= arr[i][2]; k++) {
                    int prev = j - (arr[i][1] * k);
                    if (prev >= 0) {
                        dp[i][j] = Math.max(dp[i-1][prev] + arr[i][0] * k, dp[i][j]);
                    }
                }
            }
        }

        System.out.println(dp[n][s]);
        io.close();
    }

    static class pair implements Comparable<pair>{
        int p1, p2;
        public pair(int p1, int p2){
            this.p1 = p1;
            this.p2 = p2;
        }

        @Override
        public int compareTo(pair o) {
            return Integer.compare(this.p1, o.p1);
        }
    }
}

Compilation message (stderr)

knapsack.java:4: error: class Main is public, should be declared in a file named Main.java
public class Main {
       ^
1 error