Submission #932179

#	Time	Username	Problem	Language	Result	Execution time	Memory
932179		LOLOLO	Toll (BOI17_toll)	C++17	7 / 100	114 ms	40684 KiB

toll

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

#define           f     first
#define           s     second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (int)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())

const int N = 5e4 + 10;
int k;
vector <pair <int, int>> ed[N];

struct node{
    int l, r;
    vector < vector <ll>> D;
    void ass(int L, int R) {
        l = L;
        r = R;
        D.assign(k * 2, vector <ll> (k * 2, 1e16));
        for (int i = 0; i < k * 2; i++) {
            for (int j = 0; j < k * 2; j++) {
                if (l + i == r - j) 
                    D[i][j] = 0;
            }
        }
    }
} seg[N * 4];

node add(node &L, node &R) {
    node M;
    M.ass(L.l, R.r);

    for (int i = 0; i < k * 2; i++) {
        for (int j = 0; j < k * 2; j++) {
            for (int f = 0; f < k * 2; f++) {
                int id = L.r - f;
                if (L.D[i][f] < 1e16) {
                    for (auto x : ed[id]) {
                        if (x.f >= R.l) {
                            M.D[i][j] = min(M.D[i][j], L.D[i][f] + x.s + R.D[x.f - R.l][j]);
                        }
                    }
                }
            }
        }
    }

    return M;
}

void build(int id, int l, int r) {
    if (l == r) {
        seg[id].ass(l, r);
        return;
    }

    int m = (l + r) / 2;
    build(id * 2, l, m);
    build(id * 2 + 1, m + 1, r);
    seg[id] = add(seg[id * 2], seg[id * 2 + 1]);
}

node get(int id, int l, int r, int u, int v) {
    if (l >= u && r <= v) {
        return seg[id];
    }

    int m = (l + r) / 2;
    if (m >= v)
        return get(id * 2, l, m, u, v);

    if (m < u)
        return get(id * 2 + 1, m + 1, r, u, v);

    node L = get(id * 2, l, m, u, v), R = get(id * 2 + 1, m + 1, r, u, v);
    return add(L, R);
}

ll solve() {
    int n, m, q;
    cin >> k >> n >> m >> q;

    for (int i = 1; i <= m; i++) {
        int a, b, t;
        cin >> a >> b >> t;
        a++;
        b++;
        ed[a].pb({b, t});
    } 

    build(1, 1, n);
    for (int i = 1; i <= q; i++) {
        int a, b;
        cin >> a >> b;
        a++;
        b++;
        
        auto t = get(1, 1, n, a, b);
        ll d = t.D[0][0];
        if (d >= 1e16) {
            d = -1;
        }
        cout << d << '\n';
    }
    return 0;
}

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

    int t = 1;
    //cin >> t;

    while (t--) {
        solve();
        //cout << solve() << '\n';
    }

    return 0;
}

// a * x = n * k + 

• Subtask 1: 7 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44