Submission #584471

#	Time	Username	Problem	Language	Result	Execution time	Memory
584471		dxz05	Pinball (JOI14_pinball)	C++14	100 / 100	507 ms	38824 KiB

pinball

#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
#pragma GCC target("avx2")

#include <bits/stdc++.h>

#include <random>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define lla(x) (x).rbegin(), (x).rend()
#define bpc(x) __builtin_popcount(x)
#define bpcll(x) __builtin_popcountll(x)

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

#define MP make_pair

typedef long long ll;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.000001;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 2e6 + 3e2;
const int M = 1111;

struct SegTree{
    int size = 1;
    vector<ll> t;
    SegTree(int n){
        t.assign(4 * n + 5, LLINF);
        size = n;
    }

    void update(int v, int tl, int tr, int pos, ll val){
        if (tl == tr){
            t[v] = min(t[v], val);
            return;
        }
        int tm = (tl + tr) >> 1;
        if (pos <= tm) update(v << 1, tl, tm, pos, val); else
            update(v << 1 | 1, tm + 1, tr, pos, val);
        t[v] = min(t[v << 1], t[v << 1 | 1]);
    }

    void update(int pos, ll val){
        update(1, 1, size, pos, val);
    }

    ll get(int v, int tl, int tr, int l, int r){
        if (l <= tl && tr <= r) return t[v];
        if (tl > r || tr < l) return LLINF;
        int tm = (tl + tr) >> 1;
        return min(get(v << 1, tl, tm, l, r), get(v << 1 | 1, tm + 1, tr, l, r));
    }

    ll get(int l, int r){
        return get(1, 1, size, l, r);
    }

};

long long pinball(int m, int n, vector<int> a, vector<int> b, vector<int> c, vector<int> d) {
    map<int, int> mp;
    mp[1] = mp[n] = 0;
    for (int i = 0; i < m; i++){
        mp[a[i]] = mp[b[i]] = mp[c[i]] = 0;
    }

    n = 0;
    for (auto &now : mp) now.second = ++n;

    for (int i = 0; i < m; i++){
        a[i] = mp[a[i]];
        b[i] = mp[b[i]];
        c[i] = mp[c[i]];
    }

    vector<ll> dp1(m, LLINF), dp2(m, LLINF);
    SegTree st1(n), st2(n);

    ll ans = LLINF;
    for (int i = 0; i < m; i++){
        if (a[i] == 1){
            dp1[i] = d[i];
        } else {
            dp1[i] = st1.get(a[i], b[i]) + d[i];
        }

        if (b[i] == n){
            dp2[i] = d[i];
        } else {
            dp2[i] = st2.get(a[i], b[i]) + d[i];
        }

        debug(dp1[i], dp2[i]);
        ans = min(ans, dp1[i] + dp2[i] - d[i]);

        st1.update(c[i], dp1[i]);
        st2.update(c[i], dp2[i]);
    }

    if (ans > 1e16) ans = -1;

    return ans;
}

void solve(int TC) {
    int m, n;
    cin >> m >> n;

    vector<int> a(m), b(m), c(m), d(m);
    for (int i = 0; i < m; i++) cin >> a[i] >> b[i] >> c[i] >> d[i];

    cout << pinball(m, n, a, b, c, d) << endl;

}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int TC = 1;
    //    cin >> TC;

    for (int test = 1; test <= TC; test++) {
        //debug(test);
        //cout << "Case #" << test << ": ";
        solve(test);
    }

#ifdef dddxxz
    cerr << endl << "Time: " << int(getCurrentTime() * 1000) << " ms" << endl;
#endif

    return 0;
}

Compilation message (stderr)

pinball.cpp: In function 'long long int pinball(int, int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
pinball.cpp:21:20: warning: statement has no effect [-Wunused-value]
   21 | #define debug(...) 42
      |                    ^~
pinball.cpp:116:9: note: in expansion of macro 'debug'
  116 |         debug(dp1[i], dp2[i]);
      |         ^~~~~

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