Submission #200760

#	Time	Username	Problem	Language	Result	Execution time	Memory
200760		Nordway	Gap (APIO16_gap)	C++14	30 / 100	62 ms	1944 KiB

gap

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include "gap.h"
#define x first
#define y second
#define pb push_back
#define mp make_pair
#define all(v) v.begin(),v.end()
#define sz(v) (int)v.size()
#define up_b upper_bound
#define low_b lower_bound

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>ordered_set;

template<class T,int SZ> struct BIT{
  T t[SZ];
  void upd(int x,T y){
    for(int i=x;i<SZ;i=(i|(i+1))){
      t[i]+=y;
    }
  }
  T pref(int x){
    T res=0;
    for(int i=x;i>=0;i=(i&(i+1))-1){
      res+=t[i];
    }
    return res;
  }
  T get(int l,int r){
    return pref(r)-pref(l-1);
  }
};
template<class T,int SZ> struct ST{
  T t[4*SZ];
  void build(T a[],int v,int tl,int tr){
    if(tl==tr){
      t[v]=a[tl];
      return ;
    }
    int tm=(tl+tr)/2;
    build(a,v*2,tl,tm);
    build(a,v*2+1,tm+1,tr);
    t[v]=t[v*2]+t[v*2+1];
  }
  void upd(int v,int tl,int tr,int pos,T val){
    if(tl==tr){
      t[v]+=val;
      return ;
    }
    int tm=(tl+tr)/2;
    if(pos<=tm)upd(v*2,tl,tm,pos,val);
    else upd(v*2+1,tm+1,tr,pos,val);
    t[v]=t[v*2]+t[v*2+1];
  }
  T get(int v,int tl,int tr,int l,int r){
    if(tl>r||l>tr)return 0;
    if(l<=tl&&tr<=r)return t[v];
    int tm=(tl+tr)/2;
    return get(v*2,tl,tm,l,r)+get(v*2+1,tm+1,tr,l,r);
  }
};

const int N=1e5+11;
const int M=1e3+11;
const int W=1e3+11;
const int inf=INT_MAX;
const ll INF=1e18;
const ll mod=1e9+7;
const ld EPS=1e-9;
const int dx[4]={0,0,1,-1};
const int dy[4]={1,-1,0,0};

ll a[N];

ll findGap(int T,int n){
  ll l=0,r=INF;
  if(T==1){
    ll ans=0;
    for(int i=1;i<=(n+1)/2;i++){
      ll nl=l,nr=r;
      MinMax(l,r,&nl,&nr);
      int j=n-i+1;
      a[i]=nl;
      a[j]=nr;
      l=nl+1,r=nr-1;
    }
    for(int i=1;i<n;i++){
      ans=max(ans,a[i+1]-a[i]);
    }
    return ans;
  }
  else{
    ll mn,mx;
    MinMax(l,r,&mn,&mx);
    l=1,r=INF-1;
    ll ans=0;
    while(l<=r){
      ll m=(l+r)/2;
      ll x=mn;
      int w=2;
      while(x<mx){
        ll p,q;
        MinMax(x+1,min(mx,x+m),&p,&q);
        if(p==-1&&q==-1){
          if(x+m>mx)w=0;
          else w=1;
          break;
        }
        x=q;
      }
      if(w==2)ans=m,l=m+1;
      else if(w==1)l=m+1;
      else r=m-1;
    }
    return ans;
  }
}

• Subtask 1: 30 / 30
• Subtask 2: 0 / 70