Submission #820014

#	Time	Username	Problem	Language	Result	Execution time	Memory
820014		winter0101	Pinball (JOI14_pinball)	C++14	100 / 100	376 ms	27756 KiB

pinball

#include<bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
#define pil pair<int,long long>
#define pll pair<long long,long long>
#define eb emplace_back
const long long inf=1e14+9;
const int maxn=1e5+9;
struct IT{
vector<long long>st;
void build(int id,int l,int r){
st[id]=inf;
if (l==r)return;
int mid=(l+r)/2;
build(id*2,l,mid);
build(id*2+1,mid+1,r);
}
void resz(int n){
st.resize(4*n+9);
build(1,1,n);
}
void update(int id,int l,int r,int u,long long val){
if (l>u||r<u)return;
if (l==r){
    st[id]=min(st[id],val);
    return;
}
int mid=(l+r)/2;
update(id*2,l,mid,u,val);
update(id*2+1,mid+1,r,u,val);
st[id]=min(st[id*2],st[id*2+1]);
}
long long get(int id,int l,int r,int u,int v){
if (l>v||r<u||u>v)return inf;
if (u<=l&&r<=v)return st[id];
int mid=(l+r)/2;
return min(get(id*2,l,mid,u,v),get(id*2+1,mid+1,r,u,v));
}
};
struct pin{
int x,y,z;
long long t;
}a[maxn];
int m,n;
void nen(){
vector<int>t;
t.pb(1),t.pb(n),t.pb(0);
for1(i,1,m){
t.pb(a[i].x);
t.pb(a[i].y);
t.pb(a[i].z);
}
sort(all(t));
map<int,int>d;
for1(i,1,sz(t)-1){
if (t[i]==t[i-1])continue;
d[t[i]]=d[t[i-1]]+1;
n=d[t[i]];
}
for1(i,1,m){
a[i].x=d[a[i].x],a[i].y=d[a[i].y],a[i].z=d[a[i].z];
}
}
void solve(){
IT st1,st2;
st1.resz(n),st2.resz(n);
st1.update(1,1,n,1,0);
st2.update(1,1,n,n,0);
long long ans=inf;
for1(i,1,m){
ans=min(ans,a[i].t+st1.get(1,1,n,a[i].x,a[i].y)+st2.get(1,1,n,a[i].x,a[i].y));
long long v1=a[i].t+st1.get(1,1,n,a[i].x,a[i].y);
long long v2=a[i].t+st2.get(1,1,n,a[i].x,a[i].y);
st1.update(1,1,n,a[i].z,v1),st2.update(1,1,n,a[i].z,v2);
}
if (ans>=inf)ans=-1;
cout<<ans;
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("temp.INP","r",stdin);
    //freopen("temp.OUT","w",stdout);
    cin>>m>>n;
    for1(i,1,m)cin>>a[i].x>>a[i].y>>a[i].z>>a[i].t;
    nen();
    solve();
}

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