#715486 (C++17) No.1742 Binary Indexed Train

• 問題: No.1742 Binary Indexed Train
• ユーザー: LayCurse
• 提出日時: 2021-11-12 22:02:09
• 言語: C++17 (gcc 13.3.0 + boost 1.87.0)
• 結果: AC
• 実行時間: 68 ms / 3,000 ms
• コード長: 2,480 bytes
• コンパイル時間: 2,326 ms
• コンパイル使用メモリ: 217,496 KB
• 最終ジャッジ日時: 2025-01-25 16:47:06
• ジャッジサーバーID （参考情報）: judge5 / judge5

ファイルパターン	結果
sample	AC * 3
other	AC * 32

ソースコード

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#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("inline")
#include<bits/stdc++.h>
using namespace std;
inline int my_getchar_unlocked(){
  static char buf[1048576];
  static int s = 1048576;
  static int e = 1048576;
  if(s == e && e == 1048576){
    e = fread_unlocked(buf, 1, 1048576, stdin);
    s = 0;
  }
  if(s == e){
    return EOF;
  }
  return buf[s++];
}
inline void rd(int &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = my_getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = my_getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
inline void rd(long long &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = my_getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = my_getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
struct MY_WRITER{
  char buf[1048576];
  int s;
  int e;
  MY_WRITER(){
    s = 0;
    e = 1048576;
  }
  ~MY_WRITER(){
    if(s){
      fwrite_unlocked(buf, 1, s, stdout);
    }
  }
}
;
MY_WRITER MY_WRITER_VAR;
void my_putchar_unlocked(int a){
  if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){
    fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);
    MY_WRITER_VAR.s = 0;
  }
  MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;
}
inline void wt_L(char a){
  my_putchar_unlocked(a);
}
inline void wt_L(long long x){
  int s=0;
  int m=0;
  char f[20];
  if(x<0){
    m=1;
    x=-x;
  }
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  if(m){
    my_putchar_unlocked('-');
  }
  while(s--){
    my_putchar_unlocked(f[s]+'0');
  }
}
int main(){
  int Lj4PdHRW;
  int N;
  rd(N);
  int Q;
  rd(Q);
  for(Lj4PdHRW=(0);Lj4PdHRW<(Q);Lj4PdHRW++){
    long long S;
    rd(S);
    long long T;
    rd(T);
    long long res = 0;
    while(S != T){
      if(S%2){
        S++;
        res++;
      }
      if(T%2){
        T--;
        res++;
      }
      auto RZTsC2BF = (2);
      S/=RZTsC2BF;
      T/=RZTsC2BF;
    }
    wt_L(res);
    wt_L('\n');
  }
  return 0;
}
// cLay version 20211024-1
// --- original code ---
// int @N, @Q;
// rep(Q){
//   ll @S, @T, res = 0;
//   while(S != T){
//     if(S%2) S++, res++;
//     if(T%2) T--, res++;
//     (S,T) /= 2;
//   }
//   wt(res);
// }
 
 
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