Submission #46816

#	Time	Username	Problem	Language	Result	Execution time	Memory
46816		golub	Semiexpress (JOI17_semiexpress)	C++14	0 / 100	2 ms	540 KiB

semiexpress

//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,sse4")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("unroll-all-loops")

#include <bits/stdc++.h>

//#define TASK "lca"

#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define F first
#define S second
#define pb push_back
#define int long long
#define pii pair<int, int>
#define len(x) (long long)x.size()

typedef long long ll;
//typedef long double ld;

using namespace std;

const int INF = 1e18;
const int MAXN = 1e8;
const int MOD = 1e9 + 7;
const double EPS = 1e-12;

const vector<int> dx = {1, 0, -1, 0, 0, 1, 0, -1};

//char buf[(int)1e9];
//size_t p_ = 0;
//
//inline void *operator new(size_t n_) {
//    p_ += n_;
//    return buf + p_ - n_;
//}
//inline void operator delete(void*) {};

ll power(ll x, ll n, ll mod = 1e9 + 7) {
    if (n == 0) return 1ll;
    if (n & 1ll) return power(x, n - 1ll, mod) * x % mod;
    ll tmp = power(x, n >> 1ll, mod);
    return (tmp * tmp) % mod;
}

ll gcd(ll a, ll b) {
    if (b == 0) return a;
    return gcd (b, a % b);
}

ll lcm(ll a, ll b) {
    return a / gcd(a, b) * b;
}

set<int> semiexpress;
set<pii, greater<pii>> active;

int A, B, C, T;
int n, m, k;

int MAX_SZ = 0;

int try_add(int base_time, int l, int r, int flag = -1) {
    if (l >= r || base_time > T || len(active) > MAX_SZ) return 0;
    int cnt = (T - base_time) / A;
    int next = min(l + cnt + 1, r);
    if (flag != -1) active.insert({next - l, l});
    base_time += (next - l) * C;
    try_add(base_time, next, r, 1);
    return next - l;
}

signed main() {
#ifndef LOCAL
#ifdef TASK
    freopen(TASK".in", "r", stdin);
    freopen(TASK".out", "w", stdout);
#endif
#endif
#ifdef LOCAL
    //freopen("/Users/alekseygolub/Desktop/с++/ABS/ABS/input.txt", "r", stdin);
#endif
    iostream::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    srand(924653523);
    // == SOLUTION == //
    cin >> n >> m >> k;
    cin >> A >> B >> C >> T;
    MAX_SZ = k + 10;
    vector<int> s(m);
    for (auto &in: s) { cin >> in; in--; }
    int ans = 0;
    if (s[m - 1] * B <= T) ans = 1;
    
    for (int i = 0; i < len(s) - 1; i++) {
        int base_time = s[i] * B;
        ans += try_add(base_time, s[i], s[i + 1]);
        if (len(active) > MAX_SZ) break;
    }
    k -= m;
    for (auto x: active) {
        if (k == 0) break;
        ans += x.F;
        k--;
    }
    cout << ans - 1 << "\n";
    }

• Subtask 1: 0 / 18
• Subtask 2: 0 / 30
• Subtask 3: 0 / 52