結果
問題 | No.336 門松列列 |
ユーザー | uwi |
提出日時 | 2016-01-15 22:59:38 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 159 ms / 2,000 ms |
コード長 | 3,552 bytes |
コンパイル時間 | 4,286 ms |
コンパイル使用メモリ | 81,216 KB |
実行使用メモリ | 39,684 KB |
最終ジャッジ日時 | 2024-06-12 01:09:52 |
合計ジャッジ時間 | 6,155 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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 | 142 ms
39,548 KB |
testcase_01 | AC | 51 ms
36,924 KB |
testcase_02 | AC | 51 ms
37,104 KB |
testcase_03 | AC | 52 ms
37,172 KB |
testcase_04 | AC | 159 ms
39,636 KB |
testcase_05 | AC | 52 ms
36,980 KB |
testcase_06 | AC | 87 ms
38,216 KB |
testcase_07 | AC | 116 ms
39,468 KB |
testcase_08 | AC | 131 ms
39,684 KB |
testcase_09 | AC | 141 ms
39,648 KB |
testcase_10 | AC | 133 ms
39,608 KB |
testcase_11 | AC | 136 ms
39,648 KB |
ソースコード
package contest; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; public class Q993N { InputStream is; PrintWriter out; String INPUT = ""; void solve() { int n = ni(); int mod = 1000000007; if(n <= 2){ out.println(0); return; } int[][] pre = new int[n+1][2]; // / \ int[][] cur = new int[n+1][2]; // / \ pre[0][0] = 1; pre[0][1] = 1; for(int i = 0;i < n-1;i++){ for(int j = 0;j <= n;j++){ cur[j][0] = cur[j][1] = 0; } for(int j = 0;j <= i;j++){ cur[j+1][1] += pre[j][0]; cur[j][0] += pre[j][1]; } for(int j = 1;j <= i+1;j++){ cur[j][1] += cur[j-1][1]; if(cur[j][1] >= mod)cur[j][1] -= mod; } for(int j = i;j >= 0;j--){ cur[j][0] += cur[j+1][0]; if(cur[j][0] >= mod)cur[j][0] -= mod; } int[][] dum = pre; pre = cur; cur = dum; } long ret = 0; for(int j = 0;j <= n;j++){ ret += pre[j][0]; ret += pre[j][1]; } out.println(ret%mod); } void run() throws Exception { is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes()); out = new PrintWriter(System.out); long s = System.currentTimeMillis(); solve(); out.flush(); if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms"); } public static void main(String[] args) throws Exception { new Q993N().run(); } private byte[] inbuf = new byte[1024]; private int lenbuf = 0, ptrbuf = 0; private int readByte() { if(lenbuf == -1)throw new InputMismatchException(); if(ptrbuf >= lenbuf){ ptrbuf = 0; try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); } if(lenbuf <= 0)return -1; } return inbuf[ptrbuf++]; } private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); } private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; } private double nd() { return Double.parseDouble(ns()); } private char nc() { return (char)skip(); } private String ns() { int b = skip(); StringBuilder sb = new StringBuilder(); while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ') sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } private char[] ns(int n) { char[] buf = new char[n]; int b = skip(), p = 0; while(p < n && !(isSpaceChar(b))){ buf[p++] = (char)b; b = readByte(); } return n == p ? buf : Arrays.copyOf(buf, p); } private char[][] nm(int n, int m) { char[][] map = new char[n][]; for(int i = 0;i < n;i++)map[i] = ns(m); return map; } private int[] na(int n) { int[] a = new int[n]; for(int i = 0;i < n;i++)a[i] = ni(); return a; } private int ni() { int num = 0, b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private long nl() { long num = 0; int b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); } }