結果
問題 | No.1100 Boxes |
ユーザー | 37zigen |
提出日時 | 2020-05-18 17:42:05 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 179 ms / 2,000 ms |
コード長 | 3,183 bytes |
コンパイル時間 | 2,425 ms |
コンパイル使用メモリ | 78,372 KB |
実行使用メモリ | 53,156 KB |
最終ジャッジ日時 | 2024-10-01 22:11:16 |
合計ジャッジ時間 | 9,781 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | 134 ms
53,112 KB |
testcase_01 | AC | 136 ms
53,000 KB |
testcase_02 | AC | 132 ms
52,976 KB |
testcase_03 | AC | 132 ms
52,708 KB |
testcase_04 | AC | 135 ms
52,788 KB |
testcase_05 | AC | 135 ms
52,816 KB |
testcase_06 | AC | 135 ms
52,716 KB |
testcase_07 | AC | 134 ms
52,932 KB |
testcase_08 | AC | 135 ms
53,024 KB |
testcase_09 | AC | 135 ms
52,996 KB |
testcase_10 | AC | 136 ms
52,924 KB |
testcase_11 | AC | 136 ms
52,976 KB |
testcase_12 | AC | 133 ms
52,976 KB |
testcase_13 | AC | 134 ms
52,988 KB |
testcase_14 | AC | 136 ms
52,864 KB |
testcase_15 | AC | 134 ms
52,824 KB |
testcase_16 | AC | 137 ms
52,836 KB |
testcase_17 | AC | 138 ms
53,080 KB |
testcase_18 | AC | 136 ms
53,008 KB |
testcase_19 | AC | 136 ms
53,112 KB |
testcase_20 | AC | 139 ms
52,748 KB |
testcase_21 | AC | 152 ms
53,020 KB |
testcase_22 | AC | 168 ms
53,132 KB |
testcase_23 | AC | 157 ms
52,808 KB |
testcase_24 | AC | 157 ms
53,156 KB |
testcase_25 | AC | 162 ms
52,956 KB |
testcase_26 | AC | 178 ms
53,044 KB |
testcase_27 | AC | 169 ms
52,868 KB |
testcase_28 | AC | 144 ms
52,924 KB |
testcase_29 | AC | 172 ms
53,032 KB |
testcase_30 | AC | 167 ms
53,004 KB |
testcase_31 | AC | 149 ms
53,032 KB |
testcase_32 | AC | 163 ms
52,936 KB |
testcase_33 | AC | 178 ms
53,128 KB |
testcase_34 | AC | 178 ms
53,060 KB |
testcase_35 | AC | 136 ms
53,040 KB |
testcase_36 | AC | 161 ms
52,736 KB |
testcase_37 | AC | 134 ms
53,128 KB |
testcase_38 | AC | 152 ms
52,964 KB |
testcase_39 | AC | 179 ms
52,896 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.ArrayDeque; 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=998244353; 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); } int MAX=(int)2e5; long[] fac=new long[MAX]; long[] ifac=new long[MAX]; { fac[0]=ifac[0]=1; for (int i=1;i<MAX;++i) { fac[i]=i*fac[i-1]%MOD; ifac[i]=inv(fac[i]); } } long comb(int n,int k) { return fac[n]*ifac[k]%MOD*ifac[n-k]%MOD; } void run() { FastScanner sc=new FastScanner(); int N=sc.nextInt(); int K=sc.nextInt(); long anb=0; long apb=pow(K,N); for (int i=0;i<=K;++i) { anb+=pow(MOD-2,i)*pow(K-i,N)%MOD*comb(K,i)%MOD; anb%=MOD; } long ans=(apb+MOD-anb)%MOD*inv(2)%MOD; System.out.println(ans); } 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());} }