結果

問題 No.972 選び方のスコア
ユーザー LayCurse
提出日時 2020-01-19 05:31:32
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 40 ms / 2,000 ms
コード長 4,828 bytes
コンパイル時間 3,673 ms
コンパイル使用メモリ 220,696 KB
最終ジャッジ日時 2025-01-08 20:11:48
ジャッジサーバーID
（参考情報） 		judge2 / judge2
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 * 32
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")
#include<bits/stdc++.h>
using namespace std;
void *wmem;
char memarr[96000000];
template<class S, class T> inline S min_L(S a,T b){
  return a<=b?a:b;
}
template<class T> inline void walloc1d(T **arr, int x, void **mem = &wmem){
  static int skip[16] = {0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  (*mem) = (void*)( ((char*)(*mem)) + skip[((unsigned long long)(*mem)) & 15] );
  (*arr)=(T*)(*mem);
  (*mem)=((*arr)+x);
}
void sortF_L(int N, unsigned A[], void *mem = wmem){
  int i;
  int m;
  int bt;
  unsigned *arr;
  unsigned c;
  int *sz;
  if(N < 256){
    sort(A, A+N);
    return;
  }
  bt = sizeof(unsigned) * 8;
  walloc1d(&arr, N, &mem);
  walloc1d(&sz, N, &mem);
  for(m=0;m<bt;m+=8){
    for(i=(0);i<(257);i++){
      sz[i] = 0;
    }
    for(i=(0);i<(N);i++){
      sz[ 1+((A[i]>>m)&255u) ]++;
    }
    for(i=(1);i<(257);i++){
      sz[i] += sz[i-1];
    }
    for(i=(0);i<(N);i++){
      c = ((A[i]>>m)&255u);
      arr[sz[c]++] = A[i];
    }
    swap(A, arr);
  }
}
void sortF_L(int N, int A[], void *mem = wmem){
  int i;
  int x;
  int y;
  int z;
  int *arr;
  unsigned *send;
  if(N < 256){
    sort(A, A+N);
    return;
  }
  send = (unsigned*)A;
  sortF_L(N, send, mem);
  if(A[0] < 0 || A[N-1] >= 0){
    return;
  }
  x = 0;
  y = N;
  while(x < y){
    z = (x+y) / 2;
    if(A[z] < 0){
      y = z;
    }
    else{
      x = z+1;
    }
  }
  walloc1d(&arr, N, &mem);
  z = 0;
  for(i=(x);i<(N);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(x);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(N);i++){
    A[i] = arr[i];
  }
}
void sortF_L(int N, unsigned long long A[], void *mem = wmem){
  int i;
  int m;
  int bt;
  unsigned long long *arr;
  unsigned c;
  int *sz;
  if(N < 512){
    sort(A, A+N);
    return;
  }
  bt = sizeof(unsigned long long) * 8;
  walloc1d(&arr, N, &mem);
  walloc1d(&sz, N, &mem);
  for(m=0;m<bt;m+=8){
    for(i=(0);i<(257);i++){
      sz[i] = 0;
    }
    for(i=(0);i<(N);i++){
      sz[ 1+((A[i]>>m)&255u) ]++;
    }
    for(i=(1);i<(257);i++){
      sz[i] += sz[i-1];
    }
    for(i=(0);i<(N);i++){
      c = ((A[i]>>m)&255u);
      arr[sz[c]++] = A[i];
    }
    swap(A, arr);
  }
}
void sortF_L(int N, long long A[], void *mem = wmem){
  int i;
  int x;
  int y;
  int z;
  long long *arr;
  unsigned long long *send;
  if(N < 512){
    sort(A, A+N);
    return;
  }
  send = (unsigned long long*)A;
  sortF_L(N, send, mem);
  if(A[0] < 0 || A[N-1] >= 0){
    return;
  }
  x = 0;
  y = N;
  while(x < y){
    z = (x+y) / 2;
    if(A[z] < 0){
      y = z;
    }
    else{
      x = z+1;
    }
  }
  walloc1d(&arr, N, &mem);
  z = 0;
  for(i=(x);i<(N);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(x);i++){
    arr[z++] = A[i];
  }
  for(i=(0);i<(N);i++){
    A[i] = arr[i];
  }
}
inline void rd(int &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
inline void wt_L(char a){
  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){
    putchar_unlocked('-');
  }
  while(s--){
    putchar_unlocked(f[s]+'0');
  }
}
template<class S, class T> inline S chmax(S &a, T b){
  if(a<b){
    a=b;
  }
  return a;
}
int N;
int A[200000];
long long s[200000+1];
int main(){
  wmem = memarr;
  int i;
  int j;
  int k;
  int m;
  long long res = 0;
  rd(N);
  {
    int Lj4PdHRW;
    for(Lj4PdHRW=(0);Lj4PdHRW<(N);Lj4PdHRW++){
      rd(A[Lj4PdHRW]);
    }
  }
  sortF_L(N,A);
  for(i=(0);i<(N);i++){
    s[i+1] = s[i] + A[i];
  }
  for(i=(0);i<(N);i++){
    k =min_L(i, N-1-i);
    int WYIGIcGE;
    int t_ynMSdg;
    int KrdatlYV;
    WYIGIcGE = 0;
    t_ynMSdg = k;
    while(WYIGIcGE < t_ynMSdg){
      if((WYIGIcGE + t_ynMSdg)%2==0){
        KrdatlYV = (WYIGIcGE + t_ynMSdg) / 2;
      }
      else{
        KrdatlYV = (WYIGIcGE + t_ynMSdg + 1) / 2;
      }
      if(A[i-KrdatlYV]+A[N-KrdatlYV] >= 2*A[i]){
        WYIGIcGE = KrdatlYV;
      }
      else{
        t_ynMSdg = KrdatlYV - 1;
      }
    }
    m =t_ynMSdg;
    chmax(res, (s[N] - s[N-m]) + (s[i] - s[i-m]) - 2LL * m * A[i]);
  }
  wt_L(res);
  wt_L('\n');
  return 0;
}
// cLay varsion 20200119-1
// --- original code ---
// int N, A[2d5];
// ll s[2d5+1];
// {
//   int i, j, k, m;
//   ll res = 0;
//   rd(N,A(N));
//   sortF(N,A);
//   rep(i,N) s[i+1] = s[i] + A[i];
//   rep(i,N){
//     k = min(i, N-1-i);
//     m = bsearch_max[int,m,0,k](A[i-m]+A[N-m] >= 2A[i]);
//     res >?= (s[N] - s[N-m]) + (s[i] - s[i-m]) - 2LL * m * A[i];
//   }
//   wt(res);
// }
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