結果
問題 | No.391 CODING WAR |
ユーザー | threepipes_s |
提出日時 | 2016-07-08 23:34:22 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 197 ms / 2,000 ms |
コード長 | 6,968 bytes |
コンパイル時間 | 2,772 ms |
コンパイル使用メモリ | 92,440 KB |
実行使用メモリ | 51,092 KB |
最終ジャッジ日時 | 2024-10-13 07:19:12 |
合計ジャッジ時間 | 5,567 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
(要ログイン)
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 | 51 ms
50,316 KB |
testcase_01 | AC | 53 ms
50,484 KB |
testcase_02 | AC | 52 ms
50,292 KB |
testcase_03 | AC | 53 ms
50,112 KB |
testcase_04 | AC | 53 ms
50,240 KB |
testcase_05 | AC | 52 ms
50,100 KB |
testcase_06 | AC | 54 ms
50,332 KB |
testcase_07 | AC | 54 ms
50,376 KB |
testcase_08 | AC | 53 ms
50,304 KB |
testcase_09 | AC | 197 ms
51,092 KB |
testcase_10 | AC | 194 ms
50,740 KB |
testcase_11 | AC | 53 ms
50,304 KB |
testcase_12 | AC | 52 ms
50,012 KB |
testcase_13 | AC | 189 ms
50,900 KB |
testcase_14 | AC | 167 ms
50,800 KB |
testcase_15 | AC | 177 ms
50,848 KB |
testcase_16 | AC | 133 ms
50,720 KB |
testcase_17 | AC | 149 ms
50,868 KB |
testcase_18 | AC | 120 ms
50,892 KB |
testcase_19 | AC | 121 ms
50,908 KB |
ソースコード
import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.Closeable; import java.io.FileInputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Scanner; import java.util.TreeMap; public class Main { static ContestScanner in;static Writer out;public static void main(String[] args) {try{in=new ContestScanner();out=new Writer();Main solve=new Main();solve.solve(); in.close();out.flush();out.close();}catch(IOException e){e.printStackTrace();}} static void dump(int[]a){for(int i=0;i<a.length;i++)out.print(a[i]+" ");out.println();} static void dump(int[]a,int n){for(int i=0;i<a.length;i++)out.printf("%"+n+"d ",a[i]);out.println();} static void dump(long[]a){for(int i=0;i<a.length;i++)out.print(a[i]+" ");out.println();} static void dump(char[]a){for(int i=0;i<a.length;i++)out.print(a[i]);out.println();} static long pow(long a,int n){long r=1;while(n>0){if((n&1)==1)r*=a;a*=a;n>>=1;}return r;} static String itob(int a,int l){return String.format("%"+l+"s",Integer.toBinaryString(a)).replace(' ','0');} static void sort(int[]a){m_sort(a,0,a.length,new int[a.length]);} static void sort(int[]a,int l){m_sort(a,0,l,new int[l]);} static void sort(int[]a,int l,int[]buf){m_sort(a,0,l,buf);} static void sort(int[]a,int s,int l,int[]buf){m_sort(a,s,l,buf);} static void m_sort(int[]a,int s,int sz,int[]b) {if(sz<7){for(int i=s;i<s+sz;i++)for(int j=i;j>s&&a[j-1]>a[j];j--)swap(a, j, j-1);return;} m_sort(a,s,sz/2,b);m_sort(a,s+sz/2,sz-sz/2,b);int idx=s;int l=s,r=s+sz/2;final int le=s+sz/2,re=s+sz; while(l<le&&r<re){if(a[l]>a[r])b[idx++]=a[r++];else b[idx++]=a[l++];} while(r<re)b[idx++]=a[r++];while(l<le)b[idx++]=a[l++];for(int i=s;i<s+sz;i++)a[i]=b[i]; } /* qsort(3.5s)<<msort(9.5s)<<<shuffle+qsort(17s)<Arrays.sort(Integer)(20s) */ static void sort(long[]a){m_sort(a,0,a.length,new long[a.length]);} static void sort(long[]a,int l){m_sort(a,0,l,new long[l]);} static void sort(long[]a,int l,long[]buf){m_sort(a,0,l,buf);} static void sort(long[]a,int s,int l,long[]buf){m_sort(a,s,l,buf);} static void m_sort(long[]a,int s,int sz,long[]b) {if(sz<7){for(int i=s;i<s+sz;i++)for(int j=i;j>s&&a[j-1]>a[j];j--)swap(a, j, j-1);return;} m_sort(a,s,sz/2,b);m_sort(a,s+sz/2,sz-sz/2,b);int idx=s;int l=s,r=s+sz/2;final int le=s+sz/2,re=s+sz; while(l<le&&r<re){if(a[l]>a[r])b[idx++]=a[r++];else b[idx++]=a[l++];} while(r<re)b[idx++]=a[r++];while(l<le)b[idx++]=a[l++];for(int i=s;i<s+sz;i++)a[i]=b[i];} static void swap(long[] a,int i,int j){final long t=a[i];a[i]=a[j];a[j]=t;} static void swap(int[] a,int i,int j){final int t=a[i];a[i]=a[j];a[j]=t;} static int binarySearchSmallerMax(int[]a,int v)// get maximum index which a[idx]<=v {int l=-1,r=a.length-1,s=0;while(l<=r){int m=(l+r)/2;if(a[m]>v)r=m-1;else{l=m+1;s=m;}}return s;} static int binarySearchSmallerMax(int[]a,int v,int l,int r) {int s=-1;while(l<=r){int m=(l+r)/2;if(a[m]>v)r=m-1;else{l=m+1;s=m;}}return s;} static List<Integer>[]createGraph(int n) {List<Integer>[]g=new List[n];for(int i=0;i<n;i++)g[i]=new ArrayList<>();return g;} void solve() throws NumberFormatException, IOException{ long n = in.nextLong(); long m = in.nextLong(); final long mod = 1000000007; if(m>n){ System.out.println(0); return; } long ans = modpow(m, n, mod); long comb = 1; for(int i=1; i<m; i++){ long sign = i%2==1?1:-1; comb = comb*(m-i+1)%mod; comb = comb*modinv(i, mod)%mod; ans = (ans+mod-sign*comb*modpow(m-i, n, mod)%mod)%mod; } System.out.println(ans); } long modinv(long n, long mod){ return modpow(n, mod-2, mod); } long modpow(long n, long a, long mod){ long res = 1; while(a > 0){ if((a&1)==1) res = (res*n)%mod; n = n*n%mod; a >>= 1; } return res; } } class MultiSet<T> extends HashMap<T, Integer>{ @Override public Integer get(Object key){return containsKey(key)?super.get(key):0;} public void add(T key,int v){put(key,get(key)+v);} public void add(T key){put(key,get(key)+1);} public void sub(T key){final int v=get(key);if(v==1)remove(key);else put(key,v-1);} public MultiSet<T> merge(MultiSet<T> set) {MultiSet<T>s,l;if(this.size()<set.size()){s=this;l=set;}else{s=set;l=this;} for(Entry<T,Integer>e:s.entrySet())l.add(e.getKey(),e.getValue());return l;} } class OrderedMultiSet<T> extends TreeMap<T, Integer>{ @Override public Integer get(Object key){return containsKey(key)?super.get(key):0;} public void add(T key,int v){put(key,get(key)+v);} public void add(T key){put(key,get(key)+1);} public void sub(T key){final int v=get(key);if(v==1)remove(key);else put(key,v-1);} public OrderedMultiSet<T> merge(OrderedMultiSet<T> set) {OrderedMultiSet<T>s,l;if(this.size()<set.size()){s=this;l=set;}else{s=set;l=this;} while(!s.isEmpty()){l.add(s.firstEntry().getKey(),s.pollFirstEntry().getValue());}return l;} } class Pair implements Comparable<Pair>{ int a,b;final int hash;Pair(int a,int b){this.a=a;this.b=b;hash=(a<<16|a>>16)^b;} public boolean equals(Object obj){Pair o=(Pair)(obj);return a==o.a&&b==o.b;} public int hashCode(){return hash;} public int compareTo(Pair o){if(a!=o.a)return a<o.a?-1:1;else if(b!=o.b)return b<o.b?-1:1;return 0;} } class Timer{ long time;public void set(){time=System.currentTimeMillis();} public long stop(){return time=System.currentTimeMillis()-time;} public void print(){System.out.println("Time: "+(System.currentTimeMillis()-time)+"ms");} @Override public String toString(){return"Time: "+time+"ms";} } class Writer extends PrintWriter{ public Writer(String filename)throws IOException {super(new BufferedWriter(new FileWriter(filename)));} public Writer()throws IOException{super(System.out);} } class ContestScanner implements Closeable{ private BufferedReader in;private int c=-2; public ContestScanner()throws IOException {in=new BufferedReader(new InputStreamReader(System.in));} public ContestScanner(String filename)throws IOException {in=new BufferedReader(new InputStreamReader(new FileInputStream(filename)));} public String nextToken()throws IOException { StringBuilder sb=new StringBuilder(); while((c=in.read())!=-1&&Character.isWhitespace(c)); while(c!=-1&&!Character.isWhitespace(c)){sb.append((char)c);c=in.read();} return sb.toString(); } public String readLine()throws IOException{ StringBuilder sb=new StringBuilder();if(c==-2)c=in.read(); while(c!=-1&&c!='\n'&&c!='\r'){sb.append((char)c);c=in.read();} return sb.toString(); } public long nextLong()throws IOException,NumberFormatException {return Long.parseLong(nextToken());} public int nextInt()throws NumberFormatException,IOException {return(int)nextLong();} public double nextDouble()throws NumberFormatException,IOException {return Double.parseDouble(nextToken());} public void close() throws IOException {in.close();} }