Submission #1250210

#	Time	Username	Problem	Language	Result	Execution time	Memory
1250210		CrabCNH	Semiexpress (JOI17_semiexpress)	C++20	100 / 100	6 ms	4536 KiB

semiexpress

#include <bits/stdc++.h>

#define task     "BriantheCrab"

#define int    long long
#define pii    pair <int, int>
#define fi     first
#define se     second
#define szf    sizeof
#define sz(s)  (int)((s).size())
#define all(v) (v).begin(), (v).end()

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

using namespace std;

template <class T> void minimize (T &t, T f) {if (t > f) t = f;}
template <class T> void maximize (T &t, T f) {if (t < f) t = f;}

const int maxN = 3e3 + 5;
const int inf = 1e18 + 7;
const int mod = 1e9 + 7;

// khong tu code thi khong kha len duoc dau

int s[maxN];

void solve () {
    int n, m, k;
    cin >> n >> m >> k;
    int a, b, c, t;
    cin >> a >> b >> c >> t;
    for (int i = 1; i <= m; i ++) {
        cin >> s[i];
    }
    priority_queue <int> pq;
    k -= m;
    int ans = 0;
    for (int i = 1; i < m; i ++) {
        int pos = s[i];
        bool cc = 0;
        int cnt = 0;
        while (pos < s[i + 1]) {
            //cout << "hi " << ' ' << pos << ' ' << s[i + 1] << '\n';
            int curT = t - (s[i] - 1) * b - (pos - s[i]) * c;
            if (curT < 0) {
                break;
            }
            int res = curT / a + 1;
            if (pos + res >= s[i + 1]) {
                res = s[i + 1] - pos;
                pos = s[i + 1];
            }
            pos += res;
            if (!cc) {
                ans += res;
                cc = 1;
            }
            else {
                pq.push (res);
            }
            if (++cnt > k + 1) {
                break;
            }
        }
    }
    ans += (t >= (n - 1) * b) - 1;
    //cout << ans << '\n';
    int kk = k;
    while (!pq.empty () && kk--) {
        ans += pq.top ();
        pq.pop ();
    }
    cout << ans;
    return;
}

signed main () {
    cin.tie (nullptr) -> sync_with_stdio (false);
    if (fopen (task".inp", "r")) {
        freopen (task".inp", "r", stdin);
        freopen (task".out", "w", stdout);
    }
    int t = 1;
    //cin >> t;
    while (t --) {
        solve ();
    } 
    return 0;
}
// thfv

Compilation message (stderr)

semiexpress.cpp: In function 'int main()':
semiexpress.cpp:83:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   83 |         freopen (task".inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
semiexpress.cpp:84:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   84 |         freopen (task".out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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