結果
| 問題 |
No.737 PopCount
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-03-27 19:19:47 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 132 ms / 1,000 ms |
| コード長 | 3,532 bytes |
| コンパイル時間 | 2,796 ms |
| コンパイル使用メモリ | 81,468 KB |
| 実行使用メモリ | 54,520 KB |
| 最終ジャッジ日時 | 2025-01-02 09:13:04 |
| 合計ジャッジ時間 | 6,083 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 15 |
ソースコード
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;
public class Main {
public static void main(String[] args) throws FileNotFoundException {
long t = System.currentTimeMillis();
new Main().run();
System.err.println(System.currentTimeMillis() - t);
}
final long MOD=(long)1e9+7;
void run() {
Scanner sc = new Scanner(System.in);
long N=sc.nextLong();
int len=Long.toBinaryString(N).length();
long[][][] dp =new long[len+1][2][len+1];
long[][][] dp2=new long[len+1][2][len+1];
dp[0][0][0]=1;
for(int i=0;i<len;++i) {
for(int less=0;less<=1;++less) {
for(int cur_cnt=0;cur_cnt<=len;++cur_cnt) {
if(dp[i][less][cur_cnt]==0)continue;
for(int next_val=0;next_val<=(less==1?1:((N>>(len-1-i))%2));++next_val) {
int next_cnt=cur_cnt+next_val;
int next_less=less;
if((N>>(len-1-i))%2>next_val)next_less=1;
dp[i+1][next_less][next_cnt]+=dp[i][less][cur_cnt];
dp[i+1][next_less][next_cnt]%=MOD;
dp2[i+1][next_less][next_cnt]+=dp2[i][less][cur_cnt]+next_val*(1L<<(len-1-i))*dp[i][less][cur_cnt]%MOD;
dp2[i+1][next_less][next_cnt]%=MOD;
}
}
}
}
long ans=0;
for(int less=0;less<=1;++less) {
for(int cnt=1;cnt<=len;++cnt) {
ans+=cnt*dp2[len][less][cnt]%MOD;
ans%=MOD;
}
}
System.out.println(ans);
}
static 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;}
private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}
public boolean hasNext() { skipUnprintable(); 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() {
return (int)nextLong();
}
}