Submission #76347

#	Time	Username	Problem	Language	Result	Execution time	Memory
76347		Vasiljko	Pinball (JOI14_pinball)	C++14	51 / 100	480 ms	17756 KiB

pinball

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
const ll MOD = 1e9+7;
const ll INF = 1e18+10;
const int N = 1e5+5;

int m;
ll n,a[N],b[N],c[N],d[N],dpl[N],dpr[N],tree[4*N];
unordered_map<ll,int>mp;
vector<ll>v;

void resetTree(){
    for(int i=0;i<4*N;i++)tree[i]=INF;
}

void Set(int c,ll ss,ll se,ll ind,ll val){
    if(ss==se){
        tree[c]=min(tree[c],val);
        return;
    }
    ll mid=(ss+se)>>1LL;
    if(ind<=mid)Set(c<<1,ss,mid,ind,val);
    else Set(c<<1|1,mid+1,se,ind,val);

    tree[c]=min(tree[c<<1],tree[c<<1|1]);
}

ll Get(int c,ll ss,ll se,ll qs,ll qe){
    if(qs>se||qe<ss||ss>se)return INF;
    if(qs<=ss&&se<=qe)return tree[c];

    ll mid=(ss+se)>>1LL;

    return min(Get(c<<1,ss,mid,qs,qe),Get(c<<1|1,mid+1,se,qs,qe));
}


int main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    cin>>m>>n;
    for(int i=1;i<=m;i++){
        cin>>a[i]>>b[i]>>c[i]>>d[i];
        v.push_back(a[i]);
        v.push_back(b[i]);
        v.push_back(c[i]);
    }

    sort(v.begin(),v.end());
    int cnt=0;
    ll prev=-1;
    for(auto e:v){
        if(e!=prev)cnt++;
        mp[e]=cnt;
        prev=e;
    }

    ll ans=2LL*INF;

    resetTree();
    for(int i=1;i<=m;i++){
        if(a[i]==1){
            dpl[i]=d[i];
            Set(1,1,cnt,mp[c[i]],dpl[i]);
        }else{
            dpl[i]=INF;
            dpl[i]=min(dpl[i],d[i]+Get(1,1,cnt,mp[a[i]],mp[b[i]]));
            Set(1,1,cnt,mp[c[i]],dpl[i]);
        }
    }

    resetTree();

    for(int i=1;i<=m;i++){
        if(b[i]==n){
            dpr[i]=d[i];
            Set(1,1,cnt,mp[c[i]],dpr[i]);
        }else{
            dpr[i]=INF;
            dpr[i]=min(dpr[i],d[i]+Get(1,1,cnt,mp[a[i]],mp[b[i]]));
            Set(1,1,cnt,mp[c[i]],dpr[i]);
        }
    }

    for(int i=1;i<=m;i++)ans=min(ans,dpl[i]+dpr[i]-d[i]);
    if(ans==INF)ans=-1;

    cout<<ans;
    return 0;
}

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