結果

問題 No.579 3 x N グリッド上のサイクルのサイズ(hard)
ユーザー uwi
提出日時 2017-10-13 22:52:53
言語 Java
(openjdk 23)
結果
AC  
実行時間 79 ms / 2,000 ms
コード長 5,330 bytes
コンパイル時間 4,244 ms
コンパイル使用メモリ 87,268 KB
実行使用メモリ 38,132 KB
最終ジャッジ日時 2024-11-17 11:38:58
合計ジャッジ時間 10,684 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
other AC * 80
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

package contest171013;
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 C {
InputStream is;
PrintWriter out;
String INPUT = "";
void solve()
{
long n = nl();
// 1100
// 0110
// 0011
// 1010
// 0101
// 1001
// 1122
// 1221
int[][] M = new int[20][20];
int[] v = new int[20];
v[18] = 1;
a(M, 8, 8, 0);
a(M, 9, 9, 0);
a(M, 8, 0, 2); a(M, 0, 9, 2);
a(M, 8, 1, 2); a(M, 1, 9, 2);
a(M, 8, 2, 2); a(M, 2, 9, 2);
a(M, 8, 3, 3); a(M, 3, 9, 3);
a(M, 8, 4, 3); a(M, 4, 9, 3);
a(M, 8, 5, 4); a(M, 5, 9, 4);
a(M, 8, 6, 4);
a(M, 7, 9, 4);
a(M, 0, 0, 2);
a(M, 0, 3, 3);
a(M, 0, 5, 4);
a(M, 0, 6, 4);
a(M, 1, 1, 2);
a(M, 1, 3, 3);
a(M, 1, 4, 3);
a(M, 1, 5, 4);
a(M, 2, 2, 2);
a(M, 2, 4, 3);
a(M, 2, 5, 4);
a(M, 2, 6, 4);
a(M, 3, 0, 3);
a(M, 3, 1, 3);
a(M, 3, 3, 2);
a(M, 3, 4, 4);
a(M, 3, 5, 3);
a(M, 4, 1, 3);
a(M, 4, 2, 3);
a(M, 4, 3, 4);
a(M, 4, 4, 2);
a(M, 4, 5, 3);
a(M, 5, 0, 4);
a(M, 5, 1, 4);
a(M, 5, 2, 4);
a(M, 5, 3, 3);
a(M, 5, 4, 3);
a(M, 5, 5, 2);
a(M, 5, 7, 4);
a(M, 6, 5, 4);
a(M, 6, 6, 4);
a(M, 7, 0, 4);
a(M, 7, 2, 4);
a(M, 7, 7, 4);
int[] ret = pow(M, v, n+1);
out.println(ret[9]);
}
void a(int[][] M, int f, int t, int mul)
{
M[t][f] = 1;
M[t+10][f+10] = 1;
M[t][f+10] = mul;
}
public static final int mod = 1000000007;
public static final long m2 = (long)mod*mod;
public static final long BIG = 8L*m2;
// A^e*v
public static int[] pow(int[][] A, int[] v, long e)
{
for(int i = 0;i < v.length;i++){
if(v[i] >= mod)v[i] %= mod;
}
int[][] MUL = A;
for(;e > 0;e>>>=1) {
if((e&1)==1)v = mul(MUL, v);
MUL = p2(MUL);
}
return v;
}
// int matrix*int vector
public static int[] mul(int[][] A, int[] v)
{
int m = A.length;
int n = v.length;
int[] w = new int[m];
for(int i = 0;i < m;i++){
long sum = 0;
for(int k = 0;k < n;k++){
sum += (long)A[i][k] * v[k];
if(sum >= BIG)sum -= BIG;
}
w[i] = (int)(sum % mod);
}
return w;
}
// int matrix^2 (be careful about negative value)
public static int[][] p2(int[][] A)
{
int n = A.length;
int[][] C = new int[n][n];
for(int i = 0;i < n;i++){
long[] sum = new long[n];
for(int k = 0;k < n;k++){
for(int j = 0;j < n;j++){
sum[j] += (long)A[i][k] * A[k][j];
if(sum[j] >= BIG)sum[j] -= BIG;
}
}
for(int j = 0;j < n;j++){
C[i][j] = (int)(sum[j] % mod);
}
}
return C;
}
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");
// Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
// @Override
// public void run() {
// long s = System.currentTimeMillis();
// solve();
// out.flush();
// if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
// }
// };
// t.start();
// t.join();
}
public static void main(String[] args) throws Exception { new C().run(); }
private byte[] inbuf = new byte[1024];
public 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 int[] na(int n)
{
int[] a = new int[n];
for(int i = 0;i < n;i++)a[i] = ni();
return a;
}
private long[] nal(int n)
{
long[] a = new long[n];
for(int i = 0;i < n;i++)a[i] = nl();
return a;
}
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[][] nmi(int n, int m) {
int[][] map = new int[n][];
for(int i = 0;i < n;i++)map[i] = na(m);
return map;
}
private int ni() { return (int)nl(); }
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)); }
}
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