結果
問題 | No.535 自然数の収納方法 |
ユーザー | btk |
提出日時 | 2017-04-19 13:41:31 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 129 ms / 2,000 ms |
コード長 | 4,028 bytes |
コンパイル時間 | 2,661 ms |
コンパイル使用メモリ | 77,860 KB |
実行使用メモリ | 43,124 KB |
最終ジャッジ日時 | 2024-07-19 09:25:35 |
合計ジャッジ時間 | 5,461 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
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 | 42 ms
36,344 KB |
testcase_01 | AC | 42 ms
36,752 KB |
testcase_02 | AC | 46 ms
36,876 KB |
testcase_03 | AC | 46 ms
36,464 KB |
testcase_04 | AC | 47 ms
36,216 KB |
testcase_05 | AC | 48 ms
36,248 KB |
testcase_06 | AC | 47 ms
36,580 KB |
testcase_07 | AC | 97 ms
42,200 KB |
testcase_08 | AC | 107 ms
42,752 KB |
testcase_09 | AC | 107 ms
42,604 KB |
testcase_10 | AC | 102 ms
42,224 KB |
testcase_11 | AC | 77 ms
40,956 KB |
testcase_12 | AC | 95 ms
42,512 KB |
testcase_13 | AC | 46 ms
36,212 KB |
testcase_14 | AC | 89 ms
42,236 KB |
testcase_15 | AC | 111 ms
42,488 KB |
testcase_16 | AC | 100 ms
42,644 KB |
testcase_17 | AC | 116 ms
42,496 KB |
testcase_18 | AC | 43 ms
36,624 KB |
testcase_19 | AC | 129 ms
43,124 KB |
testcase_20 | AC | 119 ms
42,316 KB |
testcase_21 | AC | 118 ms
42,320 KB |
testcase_22 | AC | 115 ms
42,352 KB |
ソースコード
import java.io.*; import java.math.BigInteger; import java.util.*; /** * Created by btk on 2017/03/16. */ public class Main { static FastScanner in; static PrintWriter out; static final int mod=(int)1e9+7; static void solve() { int N = in.nextInt(); int[] all = new int[N]; int[] sml = new int[N]; for (int i = 0; i < N; i++) { all[i] = 1; } sml[0] = 1; for (int i = 0; i < N-1; i++) { int sa = Math.max(i-1,0); for (int j = 1; j < N; j++) { all[j] += all[j-1]; sml[j] += sml[j-1]; all[j] %= mod; sml[j] %= mod; } int[] nxtall = new int[N]; int[] nxtsml = new int[N]; for (int j = 0; j < N; j++) { int jj = Math.min(j+sa,N-1); nxtall[j] = all[jj]; nxtsml[j] = sml[jj]; } all= nxtall; sml = nxtsml; } long res = 0; for (int i = 0; i < N; i++) { res += all[i]; } res+=mod-sml[N-1]; out.println(res%mod); } public static void main(String[] args){ in = new FastScanner(); out = new PrintWriter(System.out); solve(); out.flush(); out.close(); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; 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;} public boolean hasNext() { while(hasNextByte() && !isPrintableChar(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 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 double nextDouble() { return Double.parseDouble(next());} } class Pair implements Comparable<Pair> { BigInteger a; int b; public Pair(BigInteger a, int b) { this.a = a; this.b = b; } //(a,b)が一致 @Override public boolean equals(Object o) { if (o instanceof Pair) { Pair p = (Pair) o; return a == p.a && b == p.b; } return super.equals(o); } //辞書順比較 @Override public int compareTo(Pair o) { if (!a.equals(o.a)) { return a.compareTo(o.a); } return Integer.compare(b,o.b); } }