結果
問題 | No.1084 積の積 |
ユーザー |
|
提出日時 | 2020-06-20 00:32:56 |
言語 | Java (openjdk 23) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,130 bytes |
コンパイル時間 | 3,108 ms |
コンパイル使用メモリ | 78,788 KB |
実行使用メモリ | 52,876 KB |
最終ジャッジ日時 | 2024-07-03 16:19:42 |
合計ジャッジ時間 | 7,100 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 WA * 1 |
other | AC * 26 WA * 1 |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.NoSuchElementException; public class Main { public static void main(String[] args) { new Main().run(); } final long MOD=(long)1e9+7; long pow(long a,long n) { return n!=0?pow(a*a%MOD,n/2)*(n%2==1?a:1)%MOD:1; } long inv(long a) { return pow(a,MOD-2); } void run() { FastScanner sc=new FastScanner(); int N=sc.nextInt(); long ans=1; long[] A=new long[N]; for (int i=0;i<N;++i) { A[i]=sc.nextLong(); } if (Arrays.stream(A).max().getAsLong()==0) { System.out.println(0); return; } int r=0; long prd=1; long mul=1; for (int l=0;l<N;++l) { if (A[l]==0) { prd=1; mul=1; continue; } while (r<N && A[r]!=0 && prd*A[r]<1e9) { prd=prd*A[r++]; mul=mul*prd%MOD; } ans=ans*mul%MOD; mul=mul*pow(inv(A[l]),r-l)%MOD; prd=prd/A[l]; } System.out.println(ans); } void tr(Object...o) {System.out.println(Arrays.deepToString(o));} } 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());} }