Submission #892564

#	Time	Username	Problem	Language	Result	Execution time	Memory
892564		ReLice	Pinball (JOI14_pinball)	C++17	11 / 100	1 ms	468 KiB

pinball

#include <bits/stdc++.h>
#define ll long long
#define str string
#define ins insert
#define ld long double
#define pb push_back
#define pf push_front
#define pof pop_front()
#define pob pop_back()
#define lb lower_bound
#define ub upper_bound
#define endl "\n"
#define fr first
#define sc second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz size()
#define bc back()
#define ar array
#define vll vector<ll> 
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template <class _T>
bool chmin(_T &x, const _T &y){
    if(x>y){
        x=y;
        return true;
    }
    return false;
}
template <class _T>
bool chmax(_T &x, const _T &y){
    bool flag=false;
    if (x<y){
        x=y;flag|=true;
    }
    return flag;
}
#define ordered_set tree<ll, null_type,less_equal<ll>, rb_tree_tag,tree_order_statistics_node_update>
void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
void start(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
const ll inf=2e18+7;
const ll mod=1e9+7;
const ll N=3e2+7;
const ld eps=1e-9;
vll t(N*4,inf),t2(N*4,inf);
void upd(ll id,ll v,ll tl,ll tr,ll pos,ll val){
	if(tl>pos || tr<pos)return;
	if(tl==tr){
		if(id==1)chmin(t[v],val);
		else chmin(t2[v],val);
		return;
	}
	ll tm=(tl+tr)/2;
	upd(id,v*2,tl,tm,pos,val);
	upd(id,v*2+1,tm+1,tr,pos,val);
	t[v]=min(t[v*2],t[v*2+1]);
	t2[v]=min(t2[v*2],t2[v*2+1]);
}
ll get(ll id,ll v,ll tl,ll tr,ll l,ll r){
	if(tl>r || tr<l)return inf;
	if(l<=tl && tr<=r)return (id==1 ? t[v] : t2[v]);
	ll tm=(tl+tr)/2;
	return min(get(id,v*2,tl,tm,l,r),get(id,v*2+1,tm+1,tr,l,r));
}
void solve(){
	ll i,j;
	ll n,m; 
	cin>>n>>m;
	set<ll> s;
	s.ins(1);
	s.ins(m);
	vector<ar<ll,4>> v(1);
	ar<ll,4> x;
	for(i=1;i<=n;i++){
		for(j=0;j<4;j++){
			cin>>x[j];
			if(j<3)s.ins(x[j]);
		}
		v.pb(x);
	}
	map<ll,ll> pos;
	ll c=1;
	for(auto i : s){
		pos[i]=c;
		c++;
	}
	m=s.sz;
	for(i=1;i<=n;i++){
		for(j=0;j<3;j++){
			v[i][j]=pos[v[i][j]];
		}
	}
	upd(1,1,1,s.sz,1,0);
	upd(2,1,1,s.sz,s.sz,0);
	ll ans=inf;
	for(i=1;i<=n;i++){
		ll x=get(1,1,1,s.sz,v[i][0],v[i][1]),y=get(2,1,1,s.sz,v[i][0],v[i][1]);
		upd(1,1,1,s.sz,v[i][2],x+v[i][3]);
		upd(2,1,1,s.sz,v[i][2],y+v[i][3]);
		if(x<=inf && y<=inf){
			ans=min(ans,x+y+v[i][3]);
		}
	}
	if(ans==inf)cout<<-1<<endl;
	else cout<<ans<<endl;
}
signed main(){
	start();
    ll t=1;
	//cin>>t;
    while(t--) solve();
    return 0;
}
/*
1
6
5 4 3 2 1 0





*/

Compilation message (stderr)

pinball.cpp: In function 'void fre(std::string)':
pinball.cpp:42:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:42:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | void fre(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49