Submission #466125

#	Time	Username	Problem	Language	Result	Execution time	Memory
466125		Vectorized	Bank (IZhO14_bank)	Java	100 / 100	488 ms	40372 KiB

bank

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

public class bank {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int n = Integer.parseInt(st.nextToken()), m = Integer.parseInt(st.nextToken());
        int[] goal = new int[n];
        st = new StringTokenizer(br.readLine());
        for (int i = 0; i < n; i++) goal[i] = Integer.parseInt(st.nextToken());
        int[] ar = new int[m];
        st = new StringTokenizer(br.readLine());
        for (int i = 0; i < m; i++) ar[i] = Integer.parseInt(st.nextToken());
        //0 - which salary trying to pay, 1 - how much currently left
        int[][] dp = new int[(1 << m)][2];
        for (int i = 0; i < (1 << m); i++) for (int j = 0; j < 2; j++) dp[i][j] = -1;
        dp[0][0] = 0;
        dp[0][1] = 0;
        for (int i = 0; i < (1 << m); i++) {
            for (int j = 0; j < m; j++) {
                if((i & (1 << j)) != 0 && dp[(i ^ (1 << j))][0] != -1){
                    if(dp[(i ^ (1 << j))][1] + ar[j] == goal[dp[(i ^ (1 << j))][0]]){
                        dp[i][0] = dp[(i ^ (1 << j))][0] + 1;
                        dp[i][1] = 0;
                    }else if(dp[(i ^ (1 << j))][1] + ar[j] < goal[dp[(i ^ (1 << j))][0]]){
                        dp[i][0] = dp[(i ^ (1 << j))][0];
                        dp[i][1] = dp[(i ^ (1 << j))][1] + ar[j];
                    }
                    if(dp[i][0] == n){
                        System.out.println("YES");
                        System.exit(0);
                    }
                }
            }
        }
        System.out.println("NO");
    }
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29