Submission #1149416

#	Time	Username	Problem	Language	Result	Execution time	Memory
1149416		steveonalex	코알라 (JOI13_koala)	C++20	100 / 100	99 ms	9032 KiB

koala

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ull mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
// mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }


const ll INF = 1e18 + 69;


struct SegmentTree{
    struct Node{
        ll val, lazy;
        Node(ll val, ll lazy): val(val), lazy(lazy){}
    };

    int n;
    vector<Node> a;

    SegmentTree(int _n){
        n = _n;
        a.resize(n * 4 + 4, Node(0, 0));
    }

    void apply_node(int id, ll val){
        a[id].val += val;
        a[id].lazy += val;
    }

    void down(int id){
        apply_node(id * 2, a[id].lazy);
        apply_node(id * 2 + 1, a[id].lazy);
        a[id].lazy = 0;
    }

    void update(int u, int v, ll w, int l, int r, int id){
        if (u <= l && r <= v) {
            apply_node(id, w);
            return;
        }
        if (a[id].lazy) down(id);
        int mid = (l + r) >> 1;
        if (u <= mid) update(u, v, w, l, mid, id * 2);
        if (v > mid) update(u, v, w, mid + 1, r, id * 2 + 1);
        a[id].val = min(a[id * 2].val, a[id * 2 + 1].val);
    }
    void update(int u, int v, ll w){
        maximize(u, 0); minimize(v, n-1);
        if (u <= v) update(u, v, w, 0, n-1, 1);
    }

    void assign(int i, ll w, int l, int r, int id){
        if (l == r) {
            minimize(a[id].val, w);
            return;
        }
        if (a[id].lazy) down(id);
        int mid = (l + r) >> 1;
        if (i <= mid) assign(i, w, l, mid, id * 2);
        if (i > mid) assign(i, w, mid + 1, r, id * 2 + 1);
        a[id].val = min(a[id * 2].val, a[id * 2 + 1].val);
    }
    void assign(int i, ll w){
        assign(i, w, 0, n-1, 1);
    }

    ll get(int u,int v, int l, int r, int id){
        if (u <= l && r <= v) return a[id].val;
        if (a[id].lazy) down(id);
        int mid = (l + r) >> 1;
        ll ans = INF;
        if (u <= mid) minimize(ans, get(u, v, l, mid, id * 2));
        if (v > mid) minimize(ans, get(u, v, mid + 1, r, id * 2 + 1));
        return ans;
    }

    ll get(int l, int r){
        if (l > r) return INF;
        return get(l, r, 0, n-1, 1);
    }
};

void solve(){
    int K, M, D, A, n;
    cin >> K >> M >> D >> A >> n;
    vector<ll> a(n+2), c(n+2);
    a[0] = K;
    for(int i = 1; i <= n; ++i) cin >> a[i] >> c[i];
    a[n+1] = M;

    for(auto &i: a) i -= K;
    M -= K; K -= K;

    vector<ll> b = a;
    for(ll &i: b) i = i % D;
    remove_dup(b);

    int m = b.size();
    SegmentTree st(m);
    st.update(0, m-1, INF);
    st.assign(0, 0);
    for(int i = 1; i<=n+1; ++i){
        int idx = lower_bound(ALL(b), a[i] % D) - b.begin();

        ll dist = a[i] - a[i-1];

        ll cnt = dist / D;
        st.update(0, m-1, cnt * A);

        if (dist % D != 0){
            ll amount = dist % D;
            ll l = a[i] % D - amount + 1;
            ll r = a[i] % D;

            for(int t = 0; t <= 1; ++t){
                int idx1 = lower_bound(ALL(b), l) - b.begin(), idx2 = upper_bound(ALL(b), r) - b.begin() - 1;
                st.update(idx1, idx2, A);
                l += D; r += D;
            }
        }

        ll cur = INF;
        minimize(cur, st.get(0, m-1));
        minimize(cur, st.get(idx, idx) - A);

        cur = cur + A - c[i];
        st.assign(idx, cur);

        if (i == n+1) cout << -st.get(idx, idx) << "\n";
        // cout << st.get(0, m-1) << "\n";
    }
    // cout << st.get(0, m-1) << "\n";

}

int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);

    clock_t start = clock();

    solve();

    cerr << "Time elapsed: " << clock() - start << " ms\n";
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50