Submission #411203

#	Time	Username	Problem	Language	Result	Execution time	Memory
411203		cpp219	Pinball (JOI14_pinball)	C++14	100 / 100	353 ms	29768 KiB

pinball

#pragma GCC optimization "O2"
#pragma GCC optimization "unroll-loop"
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 3e5 + 9;
const ll Log2 = 20;
const ll inf = 1e16 + 7;
typedef pair<ll,ll> LL;
vector<ll> v;
struct Seg{
    ll L,R,to,val;
};
Seg a[N];
ll m,n,L,R,to,val,st[2][4*N],ans = inf;

void upd(ll cond,ll id,ll l,ll r,ll u,ll val){
    if (u < l||r < u) return;
    if (l == r){
        st[cond][id] = min(st[cond][id],val); return;
    }
    ll mid = (l + r)/2;
    upd(cond,id*2,l,mid,u,val); upd(cond,id*2 + 1,mid + 1,r,u,val);
    st[cond][id] = min(st[cond][id*2],st[cond][id*2 + 1]);
}

ll Get(ll cond,ll id,ll l,ll r,ll u,ll v){
    if (v < l||r < u) return inf;
    if (u <= l&&r <= v) return st[cond][id];
    ll mid = (l + r)/2;
    return min(Get(cond,id*2,l,mid,u,v),Get(cond,id*2 + 1,mid + 1,r,u,v));
}

/// 0 for L    1 for R

ll Find(ll x){
    return lower_bound(v.begin(),v.end(),x) - v.begin() + 1;
}

void compress(){
    sort(v.begin(),v.end()); v.resize(unique(v.begin(),v.end()) - v.begin());
    for (ll i = 1;i <= m;i++){
        a[i].L = Find(a[i].L);
        a[i].R = Find(a[i].R); a[i].to = Find(a[i].to);
    }
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    for (ll i = 1;i < 4*N;i++) st[0][i] = st[1][i] = inf;
    cin>>m>>n;
    v.push_back(1); v.push_back(n);
    for (ll i = 1;i <= m;i++){
        cin>>L>>R>>to>>val; a[i] = {L,R,to,val};
        v.push_back(L); v.push_back(R); v.push_back(to);
    }
    compress(); n = v.size();
    /*
    for (ll i = 1;i <= m;i++){
        L = a[i].L; R = a[i].R; to = a[i].to; val = a[i].val;
        cout<<L<<" "<<R<<" "<<to<<" "<<val<<"\n";
    }
    cout<<n; return 0;
    */
    for (ll i = 1;i <= m;i++){
        L = a[i].L; R = a[i].R; to = a[i].to; val = a[i].val;
        ll v1 = Get(0,1,1,n,L,R),v2 = Get(1,1,1,n,L,R);
        if (L == 1) v1 = 0;
        if (R == n) v2 = 0;
        ans = min(ans,v1 + v2 + val); //cout<<v1<<" "<<v2<<" "<<val<<"\n";
        upd(0,1,1,n,to,v1 + val); upd(1,1,1,n,to,v2 + val);
    }
    if (ans != inf) cout<<ans;
    else cout<<-1;
}

Compilation message (stderr)

pinball.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
pinball.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
pinball.cpp: In function 'int main()':
pinball.cpp:58:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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