結果

問題 No.1688 Veterinarian
ユーザー LayCurse
提出日時 2021-09-04 07:53:12
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 71 ms / 3,000 ms
コード長 4,944 bytes
コンパイル時間 3,077 ms
コンパイル使用メモリ 227,496 KB
最終ジャッジ日時 2025-01-24 07:41:33
ジャッジサーバーID
（参考情報） 		judge1 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 14
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#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++];
}
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);
}
int WRITER_DOUBLE_DIGIT = 15;
inline int writerDigit_double(){
  return WRITER_DOUBLE_DIGIT;
}
inline void writerDigit_double(int d){
  WRITER_DOUBLE_DIGIT = d;
}
inline void wt_L(double x){
  const int d = WRITER_DOUBLE_DIGIT;
  int k;
  int r;
  double v;
  if(x!=x || (x==x+1 && x==2*x)){
    my_putchar_unlocked('E');
    my_putchar_unlocked('r');
    my_putchar_unlocked('r');
    return;
  }
  if(x < 0){
    my_putchar_unlocked('-');
    x = -x;
  }
  x += 0.5 * pow(0.1, d);
  r = 0;
  v = 1;
  while(x >= 10*v){
    v *= 10;
    r++;
  }
  while(r >= 0){
    r--;
    k = floor(x / v);
    if(k >= 10){
      k = 9;
    }
    if(k <= -1){
      k = 0;
    }
    x -= k * v;
    v *= 0.1;
    my_putchar_unlocked(k + '0');
  }
  if(d > 0){
    my_putchar_unlocked('.');
    v = 1;
    for(r=(0);r<(d);r++){
      v *= 0.1;
      k = floor(x / v);
      if(k >= 10){
        k = 9;
      }
      if(k <= -1){
        k = 0;
      }
      x -= k * v;
      my_putchar_unlocked(k + '0');
    }
  }
}
long long cReader_ll(long long mn, long long mx, char nx){
  int i;
  int fg = 0;
  int m = 1;
  int f = -1;
  long long res = 0;
  double tmp = 0;
  for(;;){
    i = my_getchar_unlocked();
    if(fg==0 && i=='-'){
      fg++;
      m = -1;
    }
    else if('0' <= i  &&  i <= '9'){
      fg++;
      if(f == -1){
        f = i - '0';
      }
      res = 10 * res + i - '0';
      tmp = 10 * tmp + i - '0';
      assert(tmp < 1e20);
    }
    else{
      break;
    }
  }
  assert(tmp / 2 <= res);
  assert((m==1 && fg >= 1) || (m==-1 && fg >= 2));
  assert(mn <= m * res  &&  m * res <= mx);
  assert(!(res == 0 && m == -1));
  assert(!(res != 0 && f == 0));
  assert(!(res == 0 && fg >= 2));
  assert(i == nx);
  return m * res;
}
void cReader_eof(){
  int i;
  i = my_getchar_unlocked();
  assert(i == EOF);
}
int A;
int B;
int C;
int N;
double dp[51][51][51];
double p[51][151];
double tmp;
double res[3];
int main(){
  int cTE1_r3A, i;
  A = cReader_ll(1, 50, ' ');
  B = cReader_ll(1, 50, ' ');
  C = cReader_ll(1, 50, ' ');
  N = cReader_ll(1, 50, '\n');
  cReader_eof();
  for(i=(1);i<(51);i++){
    int j;
    for(j=(3);j<(151);j++){
      p[i][j] = ((double) i * (i-1)) / ((double) j * (j-1));
    }
  }
  dp[A][B][C] = 1;
  for(cTE1_r3A=(0);cTE1_r3A<(N);cTE1_r3A++){
    for(i=(1);i<(A+1);i++){
      int j;
      for(j=(1);j<(B+1);j++){
        int k;
        for(k=(1);k<(C+1);k++){
          tmp = dp[i][j][k];
          dp[i-1][j][k] += tmp * p[i][i+j+k];
          dp[i][j-1][k] += tmp * p[j][i+j+k];
          dp[i][j][k-1] += tmp * p[k][i+j+k];
          dp[i][j][k] -= tmp * (p[i][i+j+k] + p[j][i+j+k] + p[k][i+j+k]);
        }
      }
    }
  }
  for(i=(1);i<(A+1);i++){
    int j;
    for(j=(1);j<(B+1);j++){
      int k;
      for(k=(1);k<(C+1);k++){
        res[0] += (A-i) * dp[i][j][k];
        res[1] += (B-j) * dp[i][j][k];
        res[2] += (C-k) * dp[i][j][k];
      }
    }
  }
  {
    int jbtyPBGc;
    if(3==0){
      wt_L('\n');
    }
    else{
      for(jbtyPBGc=(0);jbtyPBGc<(3-1);jbtyPBGc++){
        wt_L(res[jbtyPBGc]);
        wt_L(' ');
      }
      wt_L(res[jbtyPBGc]);
      wt_L('\n');
    }
  }
  return 0;
}
// cLay version 20210819-1 [beta]
// --- original code ---
// int A, B, C, N;
// double dp[51][51][51], p[51][151], tmp, res[3];
// {
//   A = cReader_ll(1, 50, ' ');
//   B = cReader_ll(1, 50, ' ');
//   C = cReader_ll(1, 50, ' ');
//   N = cReader_ll(1, 50, '\n');
//   cReader_eof();
//   rep(i,1,51) rep(j,3,151) p[i][j] = ((double) i * (i-1)) / ((double) j * (j-1));
//   dp[A][B][C] = 1;
//   rep(N){
//     rep(i,1,A+1) rep(j,1,B+1) rep(k,1,C+1){
//       tmp = dp[i][j][k];
//       dp[i-1][j][k] += tmp * p[i][i+j+k];
//       dp[i][j-1][k] += tmp * p[j][i+j+k];
//       dp[i][j][k-1] += tmp * p[k][i+j+k];
//       dp[i][j][k] -= tmp * (p[i][i+j+k] + p[j][i+j+k] + p[k][i+j+k]);
//     }
//   }
//   rep(i,1,A+1) rep(j,1,B+1) rep(k,1,C+1){
//     res[0] += (A-i) * dp[i][j][k];
//     res[1] += (B-j) * dp[i][j][k];
//     res[2] += (C-k) * dp[i][j][k];
//   }
//   wt(res(3));
// }
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