Submission #878930

#	Time	Username	Problem	Language	Result	Execution time	Memory
878930		hafo	Pinball (JOI14_pinball)	C++14	100 / 100	168 ms	13656 KiB

pinball

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define pb push_back
#define pa pair<int, int>
#define pall pair<ll, int>
#define fi first
#define se second
#define TASK "test"
#define Size(x) (int) x.size()
#define all(x) x.begin(), x.end()
using namespace std;

template<typename T1, typename T2> bool mini (T1 &a, T2 b) {if(a > b) a = b; else return 0; return 1;}
template<typename T1, typename T2> bool maxi (T1 &a, T2 b) {if(a < b) a = b; else return 0; return 1;}

const int MOD = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 7;
const ll oo = 1e18 + 69;

int m, n;
struct item {
    int l, r, c, cost;
} a[maxn];
vector<int> val;

struct sub2 {
    static const int maxn = 200 + 7;
    ll dp[maxn][407][407];

    void solve() {
        for(int i = 0; i <= n; i++) {
            for(int l = 0; l < Size(val); l++) {
                for(int r = 0; r < Size(val); r++) dp[i][l][r] = oo;
            }
        }

        for(int i = 0; i < n; i++) {
            mini(dp[i + 1][a[i].l][a[i].r], a[i].cost);
            for(int l = 0; l < Size(val); l++) {
                for(int r = l; r < Size(val); r++) {
                    if(dp[i][l][r] == oo) continue;
                    if(val[l] <= a[i].c && a[i].c <= val[r]) {
                        mini(dp[i + 1][min(l, a[i].l)][max(r, a[i].r)], dp[i][l][r] + a[i].cost);
                    }
                    mini(dp[i + 1][l][r], dp[i][l][r]);
                }
            }
        }
        ll res = dp[n][0][Size(val) - 1];
        cout<<(res == oo ? -1:res);
    }

} sub2;

struct sub3 {
    static const int maxn = 1e3 + 7;
    pair<int, ll> dp[maxn][2 * maxn];

    void solve() {
        for(int i = 0; i <= n; i++) {
            for(int r = 0; r < Size(val); r++) dp[i][r] = {Size(val), oo};
        }

        for(int i = 0; i < n; i++) {
            mini(dp[i + 1][a[i].r], make_pair(a[i].l, (ll) a[i].cost));
            for(int r = 0; r < Size(val); r++) {
                if(dp[i][r].fi == Size(val)) continue;
                int l = dp[i][r].fi;
                if(val[l] <= a[i].c && a[i].c <= val[r]) {
                    auto cur = dp[i][r];
                    mini(cur.fi, a[i].l);
                    cur.se += a[i].cost;
                    mini(dp[i + 1][max(r, a[i].r)], cur);
                }
                mini(dp[i + 1][r], dp[i][r]);
            }
        }

        auto res = dp[n][Size(val) - 1];
        cout<<(res.fi != 0 ? -1:res.se);
    }   

} sub3;

struct ST {
    struct node {
        ll mn;
        friend node operator + (node a, const node &b) {
            mini(a.mn, b.mn);
            return a;
        }
    };

    node st[4 * maxn];

    void init() {
        for(int i = 0; i <= 4 * n; i++) st[i].mn = oo;
    }

    void update(int id, int l, int r, int pos, ll val) {
        if(pos < l || pos > r) return;
        if(l == r) {
            mini(st[id].mn, val);
            return;
        }
        int mid = l + r >> 1;
        update(id << 1, l, mid, pos, val);
        update(id << 1 | 1, mid + 1, r, pos, val);
        st[id] = st[id << 1] + st[id << 1 | 1];
    }

    node get(int id, int l, int r, int u, int v) {
        if(r < u || l > v) return {oo};
        if(u <= l && r <= v) return st[id];
        int mid = l + r >> 1;
        return get(id << 1, l, mid, u, v) + get(id << 1 | 1, mid + 1, r, u, v);
    }

} st;

struct sub4 {
    ll dpl[maxn], dpr[maxn];
        
    int id(int x) {
        return lower_bound(all(val), x) - val.begin() + 1;
    }

    void solve() {
        for(int i = 0; i < n; i++) {
            val.pb(a[i].c);
        }

        sort(all(val));
        val.erase(unique(all(val)), val.end());

        st.init();
        for(int i = 0; i < n; i++) {
            dpl[i] = oo;
            if(a[i].l == 1) dpl[i] = a[i].cost;
            else {
                int l = id(a[i].l);
                int r = id(a[i].r + 1) - 1;
                if(l <= r) mini(dpl[i], st.get(1, 1, n, l, r).mn + a[i].cost);
            }
            st.update(1, 1, n, id(a[i].c), dpl[i]);
        }

        st.init();
        ll ans = oo;
        for(int i = 0; i < n; i++) {
            dpr[i] = oo;
            if(a[i].r == m) dpr[i] = a[i].cost;
            else {
                int l = id(a[i].l);
                int r = id(a[i].r + 1) - 1;
                if(l <= r) mini(dpr[i], st.get(1, 1, n, l, r).mn + a[i].cost);
            }
            st.update(1, 1, n, id(a[i].c), dpr[i]);
            if(dpl[i] != oo && dpr[i] != oo) {
                mini(ans, dpl[i] + dpr[i] - a[i].cost);
            }
        }

        cout<<(ans == oo ? -1:ans);
    }

} sub4;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    //freopen(TASK".inp", "r", stdin);
    //freopen(TASK".out", "w", stdout);

    cin>>n>>m;
    for(int i = 0; i < n; i++) cin>>a[i].l>>a[i].r>>a[i].c>>a[i].cost;
    // reverse(a, a + n);
    // for(int i = 0; i < n; i++) {
    //     val.pb(a[i].l);
    //     val.pb(a[i].r);
    // }

    // val.pb(1);
    // val.pb(m);
    // sort(all(val));
    // val.erase(unique(all(val)), val.end());

    // for(int i = 0; i < n; i++) {
    //     a[i].l = lower_bound(all(val), a[i].l) - val.begin();
    //     a[i].r = lower_bound(all(val), a[i].r) - val.begin();
    // }

    // if(n <= 200) {
    //     sub2.solve();
    //     return 0;
    // }

    // if(n <= 1000) {
    //     sub3.solve();
    //     return 0;
    // }

    sub4.solve();
    return 0;
}

Compilation message (stderr)

pinball.cpp: In member function 'void ST::update(int, int, int, int, long long int)':
pinball.cpp:108:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  108 |         int mid = l + r >> 1;
      |                   ~~^~~
pinball.cpp: In member function 'ST::node ST::get(int, int, int, int, int)':
pinball.cpp:117:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  117 |         int mid = l + r >> 1;
      |                   ~~^~~

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