Submission #1039191

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039191		Whisper	Pinball (JOI14_pinball)	C++17	29 / 100	29 ms	66648 KiB

pinball

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define int long long
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FORD(i, a, b) for (int i = (b); i >= (a); i --)
#define REP(i, a) for (int i = 0; i < (a); ++i)
#define REPD(i, a) for (int i = (a) - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)


constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

/*
    Phu Trong from Nguyen Tat Thanh High School for gifted student
*/

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }
int N, M;
#define MAX         100005

struct Info{
    int l, r, m, c;
    Info(){}
    Info(int _l, int _r, int _m, int _c): l(_l), r(_r), m(_m), c(_c){}

    friend istream &operator >> (istream& cin, Info& x){
        cin >> x.l >> x.r >> x.m >> x.c;
        return cin;
    }
} A[MAX];
vector<int> comp;
int find(int x){
    return lower_bound(comp.begin(), comp.end(), x) - comp.begin() + 1;
}

int l[MAX], r[MAX];
namespace SUBTASK_3{
    bool check(void){
        return (M <= 2000);
    }

    void main(void){
        memset(l, 0x3f, (N + 1) * sizeof(int));
        memset(r, 0x3f, (N + 1) * sizeof(int));
        for (int i = 1; i <= N; ++i){
            if (A[i].l == 1) l[i] = A[i].c;
            if (A[i].r == M) r[i] = A[i].c;
            for (int j = 1; j < i; ++j){
                if (A[i].l <= A[j].m && A[j].m <= A[i].r){
                    minimize(l[i], l[j] + A[i].c);
                }
                if (A[i].l <= A[j].m && A[j].m <= A[i].r){
                    minimize(r[i], r[j] + A[i].c);
                }
            }
        }
        int ans = LINF;
        for (int i = 1; i <= N; ++i){
            minimize(ans, l[i] + r[i] - A[i].c);
        }
        cout << (ans >= 1e15 ? -1 : ans);
    }
}


namespace SUBTASK_5{
    struct SegmentTree{
        vector<int> st;
        int n;
        SegmentTree(int _n = 0){
            init(n);
        }
        void init(int _n){
            st.clear();
            this -> n = _n;
            st.resize((n << 1), LINF);
        }
        void upd(int p, int val){
            for (minimize(st[p += n], val); p > 0; p >>= 1){
                st[p >> 1] = min(st[p], st[p ^ 1]);
            }
        }
        int query(int l, int r){
            int res = LINF;
            for (l += n, r += n + 1; l < r; l >>= 1, r >>= 1){
                if (l & 1) minimize(res, st[l++]);
                if (r & 1) minimize(res, st[--r]);
            }
            return res;
        }
    };
    void main(void){
        memset(l, 0x3f, (N + 1) * sizeof(int));
        memset(r, 0x3f, (N + 1) * sizeof(int));
        #define SZ(a) (int)a.size()
        SegmentTree myit(SZ(comp));

        for (int i = 1; i <= N; ++i){
            if (A[i].l == 1) l[i] = A[i].c;
            minimize(l[i], myit.query(A[i].l, A[i].r) + A[i].c);
            myit.upd(A[i].m, l[i]);
        }

        myit.init(SZ(comp));
        for (int i = 1; i <= N; ++i){
            if (A[i].r == M) r[i] = A[i].c;
            minimize(r[i], myit.query(A[i].l, A[i].r) + A[i].c);
            myit.upd(A[i].m, r[i]);
        }
        int ans = LINF;
        for (int i = 1; i <= N; ++i){
            minimize(ans, l[i] + r[i] - A[i].c);
        }
        cout << (ans >= 1e15 ? -1 : ans);
    }
}
void process(void){
    cin >> N >> M;
    for (int i = 1; i <= N; ++i){
        cin >> A[i];
        comp.push_back(A[i].l);
        comp.push_back(A[i].r);
        comp.push_back(A[i].m);
    }
    if(SUBTASK_3 :: check()) {
        SUBTASK_3 :: main(); return;
    }
    comp.push_back(M);
    sort(comp.begin(), comp.end());
    comp.resize(unique(comp.begin(), comp.end()) - comp.begin());
    for (int i = 1; i <= N; ++i){
        A[i].l = find(A[i].l);
        A[i].r = find(A[i].r);
        A[i].m = find(A[i].m);
    }
    M = find(M);

    SUBTASK_5 :: main();
}
signed main(){
    #define name "Whisper"
    cin.tie(nullptr) -> sync_with_stdio(false);
    //freopen(name".inp", "r", stdin);
    //freopen(name".out", "w", stdout);
    process();
    return (0 ^ 0);
}

Compilation message (stderr)

pinball.cpp: In function 'void SUBTASK_5::main()':
pinball.cpp:91:17: warning: 'myit.SUBTASK_5::SegmentTree::n' is used uninitialized in this function [-Wuninitialized]
   91 |             init(n);
      |             ~~~~^~~

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49