Submission #200712

#	Time	Username	Problem	Language	Result	Execution time	Memory
200712		Nordway	Gap (APIO16_gap)	C++14	0 / 100	82 ms	1272 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];

pair<ll,ll>solve(ll l,ll r,int w){
  if(l>r)return mp(0,-1);
  ll mn=l,mx=r;
  MinMax(l,r,&mn,&mx);
  if(mn==-1&&mx==-1)return mp(0,-1);
  ll mid=(mx+mn)/2;
  pair<ll,ll>L=solve(mn+1,mid,1);
  pair<ll,ll>R=solve(mid+1,mx-1,2);
  ll res=max(L.x,R.x);
  if(L.y!=-1&&R.y!=-1)res=max(res,R.y-L.y);
  if(w==1)return mp(res,mx);
  else mp(res,mn);
}

ll findGap(int T,int n){
  ll l=0,r=INF;
  ll ans=solve(l,r,1).x;
  return ans;
}

Compilation message (stderr)

gap.cpp: In function 'std::pair<long long int, long long int> solve(ll, ll, int)':
gap.cpp:93:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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