結果
問題 | No.1025 Modular Equation |
ユーザー | 37zigen |
提出日時 | 2020-04-11 03:10:55 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,443 bytes |
コンパイル時間 | 2,454 ms |
コンパイル使用メモリ | 79,248 KB |
実行使用メモリ | 446,620 KB |
最終ジャッジ日時 | 2024-09-17 05:28:27 |
合計ジャッジ時間 | 47,468 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 54 ms
36,596 KB |
testcase_01 | AC | 55 ms
36,580 KB |
testcase_02 | AC | 79 ms
37,424 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | AC | 100 ms
38,528 KB |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | AC | 3,957 ms
428,092 KB |
testcase_22 | WA | - |
testcase_23 | AC | 3,828 ms
440,944 KB |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | AC | 4,051 ms
436,732 KB |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
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; } } public class Main { public static void main(String[] args) { new Main().run(); } final long MOD=(long)1e9+7; long gcd(long a,long b) { return a==0?b:gcd(a%b,a); } long pow_mod(long a,long n,long p) { return n==0?1:(pow_mod(a*a%p,n/2,p)*(n%2==1?a:1))%p; } 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(); long g=primitive_root(p); int n=sc.nextInt(); long[] a=new long[n]; long k=sc.nextInt(); long b=sc.nextLong(); DJSet ds=new DJSet((int)p); long[][] dp=new long[n+1][(int)p]; k=gcd(k,p-1); dp[0][0]=1; for (int i=0;i<n;++i) a[i]=sc.nextLong(); for (int i=1;i<p;++i) { ds.setUnion(i, (int)(i*pow_mod(g, k, p)%p)); } ArrayList<Integer> list=new ArrayList<>(); for (int i=1;i<p;++i) if (ds.root(i)==i) list.add(i); list.add(0); long gk=pow_mod(g, k, p); for (int i=1;i<=n;++i) { if (a[i-1]==0) { for (int j=0;j<p;++j) dp[i][j]=dp[i-1][j]*(p-1)%MOD; continue; } for (int j=0;j<p;++j) dp[i][j]=dp[i-1][j]; for (int to:list) { for (long add=1,j=0;j<(p-1)/k;++j,add=add*gk%p) { int from=(int)((to-a[i-1]*add%p+p)%p); dp[i][ds.root(to)]+=dp[i-1][ds.root(from)]*k%MOD; dp[i][ds.root(to)]%=MOD; } } } pw.println(dp[n][ds.root((int)b)]); 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());} }