Submission #595024

#	Time	Username	Problem	Language	Result	Execution time	Memory
595024		piOOE	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	147 ms	66148 KiB

semiexpress

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll n, m, k;
    cin >> n >> m >> k;
    ll a, b, c;
    cin >> a >> b >> c; //slow, fast, middle
    ll t;
    cin >> t;
    vector<ll> s(m);
    for (int i = 0; i < m; ++i) {
        cin >> s[i];
    }
    vector<pair<ll, bool>> v;
    ll ans = 0;
    s.push_back(n + 1);
    for (int i = 0; i <= m; ++i) {
        ll dist = (s[i] - 1) * b;
        if (dist > t) {
            break;
        }
        ll x = s[i];
        int cnt = 0;
        while (x < s[i + 1] && dist <= t && cnt < k) {
            ll nxt = (t - dist) / a;
            if (x + nxt + 1 >= s[i + 1]) {
                nxt = s[i + 1] - x - 1;
            }
            cnt += (x != s[i]);
            v.push_back({nxt + 1, x != s[i]});
            dist += (nxt + 1) * c;
            x += nxt + 1;
        }
    }
    sort(v.begin(), v.end(), greater());
    int cnt = m;
    for (int i = 0; i < v.size(); ++i) {
        if (cnt + v[i].second <= k) {
            ans += v[i].first;
            cnt += v[i].second;
        }
    }
    cout << ans - 1;
    return 0;
}

Compilation message (stderr)

semiexpress.cpp: In function 'int main()':
semiexpress.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for (int i = 0; i < v.size(); ++i) {
      |                     ~~^~~~~~~~~~

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