Submission #257163

#	Time	Username	Problem	Language	Result	Execution time	Memory
257163		Nucleist	Pinball (JOI14_pinball)	C++14	100 / 100	505 ms	17400 KiB

pinball

//Self-control leads to consistency.
#include <bits/stdc++.h> 
using namespace std; 
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#define flash ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define debug(x) cerr << " - " << #x << ": " << x << endl;
#define debugs(x, y) cerr << " - " << #x << ": " << x << " " << #y << ": " << y << endl;
#define all(x) (x).begin(),(x).end()
#define sz(x) (ll)x.size()
#define ll long long
#define INF 100000000000000000
#define MOD 1000000007
#define pb push_back
#define ve vector<ll>
#define dos pair<ll,ll>
#define vedos vector<dos>
#define rand mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#define EPS 0.000001
struct greateri
{
    template<class T>
    bool operator()(T const &a, T const &b) const { return a > b; }
};
void setIO(string s) {
  ios_base::sync_with_stdio(0); cin.tie(0); 
  freopen((s+".in").c_str(),"r",stdin);
  freopen((s+".out").c_str(),"w",stdout);
}
ll m,n,price[100001],seg[400001],dp[100001],pos[100001],dp1[100001];
dos ran[100001];
void upd(ll p,ll l,ll r,ll in,ll val){
  if(l==r && l==in){
    seg[p]=val;
    return;
  }
  ll med=(l+r)>>1;
  if(in<=med)
    upd(p*2,l,med,in,val);
  else  upd(p*2+1,med+1,r,in,val);
  seg[p]=min(seg[p*2],seg[p*2+1]);
}
ll query(ll p,ll l,ll r,ll l1,ll r1){
  if(l>r || l>r1 || l1>r)return INF;
  if(l>=l1 && r<=r1)return seg[p];
  ll med=(l+r)>>1;
  return min(query(p*2,l,med,l1,r1),query(p*2+1,med+1,r,l1,r1));
}
int main()
{
  flash;
  cin>>m>>n; 
  set<dos> in;
  for (ll i = 0; i < m; ++i)
  {
    ll a,b,c,d;
    cin>>a>>b>>c>>d;
    a--,b--,c--;
    ran[i]={a,b};
    in.insert({c,i});
    price[i]=d;
  }
  ll co=0;
  for(auto it:in){
    pos[it.second]=co++;
  }
  for (ll i = 0; i < m; ++i)
  {
    dp[i]=INF;
    upd(1,0,m-1,pos[i],dp[i]); 
  }
  for (ll i = 0; i < m; ++i)
  {
    if(ran[i].first==0)dp[i]=price[i];
    else{
      auto u=in.lower_bound({ran[i].first,-INF});
      auto v=in.lower_bound({ran[i].second+1,-INF});
      if(v!=in.begin() && u!=in.end()){
        v--;
        dp[i]=price[i]+query(1,0,m-1,pos[(*u).second],pos[(*v).second]);
      }
    }
    upd(1,0,m-1,pos[i],dp[i]);
  }
  for (ll i = 0; i < m; ++i)
  {
    dp1[i]=INF;
    upd(1,0,m-1,pos[i],dp1[i]); 
  }
  for (ll i = 0; i < m; ++i)
  {
    if(ran[i].second==n-1)dp1[i]=price[i];
    else{
      auto u=in.lower_bound({ran[i].first,-INF});
      auto v=in.lower_bound({ran[i].second+1,-INF});
      if(v!=in.begin() && u!=in.end()){
        v--;
        dp1[i]=price[i]+query(1,0,m-1,pos[(*u).second],pos[(*v).second]);
      }
    }
    upd(1,0,m-1,pos[i],dp1[i]);
  }
  ll ans=INF;
  for (ll i = 0; i < m; ++i)
  {
    ans=min(ans,dp[i]+dp1[i]-price[i]);
  }
  if(ans==INF)cout<<-1;
  else cout<<ans;
  return 0;
}

Compilation message (stderr)

pinball.cpp:5:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("O3")
 
pinball.cpp:6:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("unroll-loops")
 
pinball.cpp: In function 'void setIO(std::__cxx11::string)':
pinball.cpp:28:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen((s+".in").c_str(),"r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:29:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen((s+".out").c_str(),"w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 49 / 49