Submission #854578

#	Time	Username	Problem	Language	Result	Execution time	Memory
854578		becaido	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	49 ms	604 KiB

semiexpress

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout (T t, U...u) {cout << t << (sizeof... (u) ? ", " : ""), dout (u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 3005;

int n, m, k;
int a, b, c;
ll t;
int p[SIZE], dp[2][SIZE];

void solve() {
    cin >> n >> m >> k;
    cin >> a >> b >> c >> t;
    FOR (i, 1, m) cin >> p[i], p[i]--;

    // D1*B + D2*C + D3*A
    k -= m;
    FOR (i, 1, m - 1) {
        int f = i & 1, pos = p[i];
        FOR (j, 0, k) dp[f][j] = dp[!f][j];
        ll cur = t - 1ll * p[i] * b;
        for (int j = 0; j <= k && cur >= 0; j++) {
            int can = min((ll) p[i + 1] - pos, cur / a + 1);
            pos += can;
            cur -= 1ll * c * can;
            FOR (x, j, k) dp[f][x] = max(dp[f][x], dp[!f][x - j] + pos - p[i]);
        }
    }

    int ans = dp[!(m & 1)][k] - 1;
    ans += 1ll * p[m] * b <= t;
    cout << ans << '\n';
}

int main() {
    Waimai;
    solve();
}

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