結果
問題 | No.1025 Modular Equation |
ユーザー | 37zigen |
提出日時 | 2020-04-11 06:19:54 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 2,801 ms / 5,000 ms |
コード長 | 4,678 bytes |
コンパイル時間 | 2,356 ms |
コンパイル使用メモリ | 78,668 KB |
実行使用メモリ | 56,156 KB |
最終ジャッジ日時 | 2024-09-17 10:04:45 |
合計ジャッジ時間 | 50,617 ms |
ジャッジサーバーID (参考情報) |
judge6 / judge1 |
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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 | 55 ms
50,124 KB |
testcase_01 | AC | 54 ms
50,168 KB |
testcase_02 | AC | 65 ms
50,056 KB |
testcase_03 | AC | 78 ms
50,900 KB |
testcase_04 | AC | 76 ms
50,844 KB |
testcase_05 | AC | 73 ms
50,784 KB |
testcase_06 | AC | 63 ms
49,952 KB |
testcase_07 | AC | 75 ms
51,012 KB |
testcase_08 | AC | 74 ms
50,852 KB |
testcase_09 | AC | 2,629 ms
55,768 KB |
testcase_10 | AC | 2,801 ms
55,676 KB |
testcase_11 | AC | 2,047 ms
55,760 KB |
testcase_12 | AC | 1,986 ms
55,848 KB |
testcase_13 | AC | 1,560 ms
55,696 KB |
testcase_14 | AC | 1,755 ms
56,156 KB |
testcase_15 | AC | 1,496 ms
55,188 KB |
testcase_16 | AC | 1,461 ms
55,560 KB |
testcase_17 | AC | 1,423 ms
55,140 KB |
testcase_18 | AC | 1,388 ms
55,572 KB |
testcase_19 | AC | 1,633 ms
55,544 KB |
testcase_20 | AC | 1,891 ms
55,460 KB |
testcase_21 | AC | 1,706 ms
55,804 KB |
testcase_22 | AC | 1,772 ms
55,352 KB |
testcase_23 | AC | 2,087 ms
55,564 KB |
testcase_24 | AC | 2,505 ms
55,344 KB |
testcase_25 | AC | 2,271 ms
55,372 KB |
testcase_26 | AC | 2,040 ms
55,308 KB |
testcase_27 | AC | 1,477 ms
55,860 KB |
testcase_28 | AC | 1,652 ms
55,388 KB |
testcase_29 | AC | 1,437 ms
55,372 KB |
testcase_30 | AC | 2,088 ms
55,556 KB |
testcase_31 | AC | 1,955 ms
55,736 KB |
testcase_32 | AC | 2,166 ms
55,424 KB |
testcase_33 | AC | 56 ms
49,788 KB |
testcase_34 | AC | 195 ms
55,056 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; class DJSet { int n; int[] upper; public DJSet(int n) { this.n=n; upper=new int[n]; Arrays.fill(upper, -1); } int root(int x) { return upper[x]<0?x:(upper[x]=root(upper[x])); } boolean equiv(int x,int y) { return root(x)==root(y); } void setUnion(int x,int y) { x=root(x);y=root(y); if (x==y) return; if (upper[x]<upper[y]) { x^=y;y^=x;x^=y; } if (upper[x]==upper[y]) --upper[y]; upper[x]=y; --n; } } public class Main { public static void main(String[] args) { new Main().run(); } final long MOD=(long)1e9+7; long ADD(long a,long b) { return a+b>=MOD?a+b-MOD:a+b; } long gcd(long a,long b) { return a==0?b:gcd(b%a,a); } long pow_mod(long a,long n,long p) { long ret=1; for (;n>0;n>>=1,a=a*a%p) if(n%2==1) ret=ret*a%p; return ret; } long primitive_root(long p) { if (p==2) return 1; out:for (long root=2;root<p;++root) { for (long div=2;div*div<=p-1;++div) { if ((p-1)%div!=0) continue; for (long d:new long[] {div,(p-1)/div}) { if (pow_mod(root,d,p)==1) continue out; } } return root; } throw new AssertionError(); } void run() { FastScanner sc=new FastScanner(); PrintWriter pw=new PrintWriter(System.out); long p=sc.nextLong(); int n=sc.nextInt(); long k=gcd(sc.nextInt(),p-1); long b=sc.nextLong(); long g=primitive_root(p); long[] gk=new long[(int)((p-1)/k)+1]; gk[0]=1;gk[1]=pow_mod(g, k, p); for (int i=2;i<gk.length;++i) gk[i]=gk[i-1]*gk[1]%p; long[][] dp=new long[2][(int)p]; int[] ds_root=new int[(int)p]; DJSet ds=new DJSet((int)p); dp[0][0]=1; for (int i=1;i<p;++i) ds.setUnion(i, (int)(i*gk[1]%p)); int[] list=new int[ds.n]; { int pos=0; for (int i=0;i<p;++i) if (ds.root(i)==i) list[pos++]=i; } for (int i=0;i<p;++i) ds_root[i]=ds.root(i); int e=0; for (int i=1;i<=n;++i) { int a=sc.nextInt(); for (int j=0;j<p;++j) dp[i%2][j]=dp[(i-1)%2][j]; if (a==0) { ++e; continue; } for (int to:list) { long sum=dp[i%2][ds_root[to]]; for (int j=0;j<(p-1)/k;++j) { int from=(int)((to+(p-a)*gk[j])%p); if (dp[(i-1)%2][ds_root[from]]==0) continue; sum+=dp[(i-1)%2][ds_root[from]]*k; } dp[i%2][ds_root[to]]=sum%MOD; } } pw.println(dp[n%2][ds_root[(int)b]]*pow_mod(p, e, MOD)%MOD); pw.close(); } void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));} } 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());} }