Submission #385744

#	Time	Username	Problem	Language	Result	Execution time	Memory
385744		dapig	Calvinball championship (CEOI15_teams)	Java	10 / 100	318 ms	65536 KiB

teams

//package week4;

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

class teams {

	public static void main(String[] args) throws IOException {

		teams obj = new teams();

		obj.doStuff();

	}

	int[][] grid; // [pos] [number of valid ways if at cur pos and max val is #]
	int[] vals;
	private void doStuff() throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int len = Integer.parseInt(br.readLine());
		StringTokenizer st = new StringTokenizer(br.readLine());
		vals = new int[len];
		for (int i = 0; i < vals.length; i++) {
			vals[i] = Integer.parseInt(st.nextToken());
		}
		br.close();

		grid = new int[vals.length][vals.length+1];
		Arrays.fill(grid[grid.length-1], 1);
		grid[grid.length-1][0] = 0;
		for (int i = 1; i < grid[0].length; i++) {
			grid[grid.length-1][i] += grid[grid.length-1][i-1];
		}
		for (int i = grid.length-2; i >= 0; i--) {
			for (int j = 1; j <= i+1; j++) {
				grid[i][j] = (grid[i+1][j+1]+grid[i][j-1])%1000007;
			}
		}
		int ans = 1;
		for (int i = 0; i < vals.length; i++) {
			ans += grid[i][vals[i]-1];
			ans %= 1000007;
		}
		System.out.println(ans);

	}

}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10