Submission #670058

#	Time	Username	Problem	Language	Result	Execution time	Memory
670058		GrandTiger1729	Semiexpress (JOI17_semiexpress)	C++17	100 / 100	14 ms	3532 KiB

semiexpress

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){
    cin.tie(0)->sync_with_stdio(0);
    long long n;
    int m, k;
    cin >> n >> m >> k;
    long long A, B, C; 
    cin >> A >> B >> C;
    long long T; cin >> T;
    vector<long long> a(m);
    for (int i = 0; i < m; i++){
        cin >> a[i];
    }
    k -= m;
    vector<long long> res;
    res.reserve((m - 1) * (k + 1));
    long long ans = 0;
    for (int i = 0; i < m - 1; i++){
        if (T - B * (a[i] - a[0]) < 0){
            break;
        }
        long long cur = min((T - B * (a[i] - a[0])) / A, a[i + 1] - a[i] - 1);
        ans += 1 + cur;
        for (int j = 1; j <= k; j++){
            if (T - B * (a[i] - a[0]) - C * (cur + 1) < 0 || a[i + 1] - a[i] - (cur + 1) - 1 < 0){
                break;
            }
            res.push_back(min((T - B * (a[i] - a[0]) - C * (cur + 1)) / A, a[i + 1] - a[i] - (cur + 1) - 1));
            cur += res.back() + 1;
        }
    }
    if (T - B * (a[m - 1] - a[0]) >= 0){
        ans++;
    }
    sort(res.begin(), res.end(), greater<long long>());
    if (res.size() > k)
        res.resize(k);
    for (int i = 0; i < res.size(); i++){
        ans += res[i] + 1;
    }
    cout << ans - 1;
    return 0;
}

Compilation message (stderr)

semiexpress.cpp: In function 'int main()':
semiexpress.cpp:40:20: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |     if (res.size() > k)
      |         ~~~~~~~~~~~^~~
semiexpress.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for (int i = 0; i < res.size(); i++){
      |                     ~~^~~~~~~~~~~~

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