結果

問題 No.269 見栄っ張りの募金活動
ユーザー ぴろずぴろず
提出日時 2015-08-21 23:08:48
言語 Java21
(openjdk 21)
結果
AC  
実行時間 78 ms / 5,000 ms
コード長 4,216 bytes
コンパイル時間 4,372 ms
コンパイル使用メモリ 77,600 KB
実行使用メモリ 49,040 KB
最終ジャッジ日時 2024-07-16 01:29:43
合計ジャッジ時間 4,316 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge4
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 52 ms
47,880 KB
testcase_01 AC 51 ms
48,304 KB
testcase_02 AC 53 ms
48,256 KB
testcase_03 AC 58 ms
48,272 KB
testcase_04 AC 76 ms
48,996 KB
testcase_05 AC 55 ms
48,296 KB
testcase_06 AC 53 ms
48,292 KB
testcase_07 AC 78 ms
49,040 KB
testcase_08 AC 52 ms
48,240 KB
testcase_09 AC 52 ms
48,236 KB
testcase_10 AC 53 ms
47,868 KB
testcase_11 AC 59 ms
48,336 KB
testcase_12 AC 51 ms
48,276 KB
testcase_13 AC 60 ms
47,988 KB
testcase_14 AC 53 ms
48,272 KB
testcase_15 AC 63 ms
48,252 KB
testcase_16 AC 51 ms
48,236 KB
testcase_17 AC 51 ms
48,000 KB
testcase_18 AC 69 ms
48,768 KB
testcase_19 AC 62 ms
48,448 KB
testcase_20 AC 52 ms
47,884 KB
testcase_21 AC 53 ms
47,996 KB
testcase_22 AC 58 ms
48,276 KB
testcase_23 AC 52 ms
48,412 KB
testcase_24 AC 54 ms
48,024 KB
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ソースコード

diff # 

package no269;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;

public class Main {
	public static int MOD = 1000000007;
	public static void main(String[] args) {
		IO io = new IO();
		int N = io.nextInt();
		int S = io.nextInt();
		int K = io.nextInt();
		int n = S - N * (N - 1) / 2 * K;
		if (n < 0) {
			System.out.println(0);
			return;
		}
		int[] dp = new int[n+1];
		dp[0] = 1;
		for(int i=1;i<=N;i++) {
			for(int j=0;j<=n-i;j++) {
				dp[j+i] = dp[j] + dp[j+i];
				if (dp[j+i] >= MOD) {
					dp[j+i] -= MOD;
				}
			}
//			System.out.println(Arrays.toString(dp));
		}
		System.out.println(dp[n]);
	}

}
class IO extends PrintWriter {
	private final InputStream in;
	private final byte[] buffer = new byte[1024];
	private int ptr = 0;
	private int buflen = 0;

	public IO() { this(System.in);}
	public IO(InputStream source) { super(System.out); this.in = source;}
	private boolean hasNextByte() {
		if (ptr < buflen) {
			return true;
		}else{
			ptr = 0;
			try {
				buflen = in.read(buffer);
			} catch (IOException e) {
				e.printStackTrace();
			}
			if (buflen <= 0) {
				return false;
			}
		}
		return true;
	}
	private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
	private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
	private static boolean isNewLine(int c) { return c == '\n' || c == '\r';}
	public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
	public boolean hasNextLine() { while(hasNextByte() && isNewLine(buffer[ptr])) ptr++; return hasNextByte();}
	public String next() {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		StringBuilder sb = new StringBuilder();
		int b = readByte();
		while(isPrintableChar(b)) {
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	public char[] nextCharArray(int len) {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		char[] s = new char[len];
		int i = 0;
		int b = readByte();
		while(isPrintableChar(b)) {
			if (i == len) {
				throw new InputMismatchException();
			}
			s[i++] = (char) b;
			b = readByte();
		}
		return s;
	}
	public String nextLine() {
		if (!hasNextLine()) {
			throw new NoSuchElementException();
		}
		StringBuilder sb = new StringBuilder();
		int b = readByte();
		while(!isNewLine(b)) {
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	public long nextLong() {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		long n = 0;
		boolean minus = false;
		int b = readByte();
		if (b == '-') {
			minus = true;
			b = readByte();
		}
		if (b < '0' || '9' < b) {
			throw new NumberFormatException();
		}
		while(true){
			if ('0' <= b && b <= '9') {
				n *= 10;
				n += b - '0';
			}else if(b == -1 || !isPrintableChar(b)){
				return minus ? -n : n;
			}else{
				throw new NumberFormatException();
			}
			b = readByte();
		}
	}
	public int nextInt() {
		long nl = nextLong();
		if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) {
			throw new NumberFormatException();
		}
		return (int) nl;
	}
	public char nextChar() {
		if (!hasNext()) {
			throw new NoSuchElementException();
		}
		return (char) readByte();
	}
	public double nextDouble() { return Double.parseDouble(next());}
	public int[] nextIntArray(int n) { int[] a = new int[n]; for(int i=0;i<n;i++) a[i] = nextInt(); return a;}
	public long[] nextLongArray(int n) { long[] a = new long[n]; for(int i=0;i<n;i++) a[i] = nextLong(); return a;}
	public double[] nextDoubleArray(int n) { double[] a = new double[n]; for(int i=0;i<n;i++) a[i] = nextDouble(); return a;}
	public void nextIntArrays(int[]... a) { for(int i=0;i<a[0].length;i++) for(int j=0;j<a.length;j++) a[j][i] = nextInt();}
	public int[][] nextIntMatrix(int n,int m) { int[][] a = new int[n][]; for(int i=0;i<n;i++) a[i] = nextIntArray(m); return a;}
	public char[][] nextCharMap(int n,int m) { char[][] a = new char[n][]; for(int i=0;i<n;i++) a[i] = nextCharArray(m); return a;}
	public void close() { super.close(); try {in.close();} catch (IOException e) {}}
}
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