Submission #480154

#	Time	Username	Problem	Language	Result	Execution time	Memory
480154		hidden1	Pinball (JOI14_pinball)	C++14	100 / 100	452 ms	42184 KiB

pinball

#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 2e15 + 7;
#define debug(...) cout << "Line: " << __LINE__ << endl; \
    prllDebug(", "#__VA_ARGS__, __VA_ARGS__)
template <typename T>
void prllDebug(const char* name, T&& arg1) { cout << (name + 2) << " = " << arg1 << endl; }
template <typename T, typename... T2>
void prllDebug(const char* names, T&& arg1, T2&&... args) {
    const char* end = strchr(names + 1, ',');
    cout.write(names + 2, end - names - 2) << " = " << arg1 << endl;
    prllDebug(end, args...);
}
 
const ll MAX_N = 5e5 + 10;
struct SegTree {
    ll tree[4 * MAX_N];
    SegTree() {
        fill(tree, tree + MAX_N * 4, mod);
    }

    ll ans(ll curr, ll l, ll r, ll ql, ll qr) {
        if(ql <= l && r <= qr) {
            return tree[curr];
        } else if(ql > r || l > qr) {
            return mod;
        }
        ll m = (l + r) / 2ll;
        return min(
            ans(curr * 2, l, m, ql, qr),
            ans(curr * 2 + 1, m + 1, r, ql, qr)
            );
    }

    void upd(ll curr, ll l, ll r, ll ind, ll val) {
        if(l == r && l == ind) {
            chkmin(tree[curr], val);
            return;
        } else if(l > ind || r < ind) {return;}
        ll m = (l + r) / 2ll;
        upd(curr * 2, l, m, ind, val);
        upd(curr * 2 + 1, m + 1, r, ind, val);
        tree[curr] = min(tree[curr * 2], tree[curr * 2 + 1]);
    }
};

SegTree lft, rght;

struct Comp {
    vector<ll> start;

    void push(ll x) {
        start.push_back(x);
    }

    void compress() {
        sort(start.begin(), start.end());
        start.resize(unique(start.begin(), start.end()) - start.begin());
    }

    ll get(ll x) {
        return lower_bound(start.begin(), start.end(), x) - start.begin();
    }
};

Comp comp;
ll n, m;
ll a[MAX_N], b[MAX_N], c[MAX_N], d[MAX_N];

signed main() {
    // ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);

    cin >> m >> n;
    for(ll i = 0; i < m; i ++) {
        cin >> a[i] >> b[i] >> c[i] >> d[i];
        comp.push(a[i]);
        comp.push(b[i]);
        comp.push(c[i]);
    }   

    comp.compress();

    ll ans = mod;

    for(ll i = 0; i < m; i ++) {
        ll lftBest = lft.ans(1, 0, MAX_N - 1, comp.get(a[i]), comp.get(b[i]));
        if(a[i] == 1) {
            lftBest = 0;
        }
        lftBest += d[i];
        lft.upd(1, 0, MAX_N - 1, comp.get(c[i]), lftBest);

        ll rghtBest = rght.ans(1, 0, MAX_N - 1, comp.get(a[i]), comp.get(b[i]));
        if(b[i] == n) {
            rghtBest = 0;
        }
        rghtBest += d[i];
        rght.upd(1, 0, MAX_N - 1, comp.get(c[i]), rghtBest);

        chkmin(ans, lftBest + rghtBest - d[i]);
    }

    if(ans == mod) {
        cout << -1 << endl;
    } else {
        cout << ans << endl;
    }
    return 0;
}

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