oj.uz

Submission #925051

# Submission time Handle Problem Language Result Execution time Memory
925051 2024-02-10T14:10:03 Z niter Semiexpress (JOI17_semiexpress) C++14
0 / 100
 0 ms 348 KB 
#include <bits/stdc++.h>
#define loop(i,a,b) for(int i = (a); i < (b); i ++)
#define pb push_back
#define BAE(x) x.begin(), x.end()
#define unisort(x) sort(BAE(x)); x.resize(unique(BAE(x)) - x.begin())
using namespace std;
typedef long long ll;

const int mxn = 3005;
int n, m, k, ans;
ll A, B, C, T;
int arr[mxn];

struct range{
    ll base, ed, nxt_base, nxt_ed, get, sz;
};
struct cmp{
    bool operator()(range x, range y){
        return x.get < y.get;
    }
};
priority_queue<range, vector<range>, cmp> pq;

inline void build(int l, int r, ll base_cost){
    if(l > r) return;
    if(base_cost > T) return;
    range tmp;
    // the cost of the (l-1) th station
    tmp.base = base_cost;
    tmp.sz = r - l + 1;
    // the first station whose distance is greater than T.
    tmp.ed = min((T - base_cost) / A + 1, tmp.sz + 1);
    ans += tmp.ed - 1;
    if(tmp.ed > tmp.sz || tmp.base + C > T){
        return;
    }
    tmp.nxt_base = tmp.base + tmp.ed * C;
    tmp.nxt_ed = min(tmp.ed + ((T - tmp.nxt_base) / A + 1), tmp.sz + 1);
    tmp.get = tmp.nxt_ed - tmp.ed;
    if(tmp.get > 0)
        pq.push(tmp);
}

int main(){
    ios::sync_with_stdio(false); cin.tie(0);
//    freopen("in.txt", "r", stdin);
    cin >> n >> m >> k;
    cin >> A >> B >> C >> T;
    loop(i,0,m){
        cin >> arr[i];
    }
    loop(i,1,m){
        if(B * (arr[i] - 1) <= T) ans += 1;
        build(arr[i-1] + 1, arr[i] - 1, B * (arr[i-1] - 1));
    }
    if(pq.empty()){
        cout << ans << '\n';
        return 0;
    }
    loop(build_count,0,k-m){
        range now = pq.top();
        pq.pop();
        ans += now.get;
        if(now.nxt_ed != now.sz + 1){
            now.base = now.nxt_base;
            now.sz -= now.ed;
            now.ed = min((T - now.base) / A + 1, now.sz + 1);
            if(now.ed <= now.sz && now.base + C <= T){
                now.nxt_base = now.base + now.ed * C;
                now.nxt_ed = min(now.ed + ((T - now.nxt_base) / A + 1), now.sz + 1);
                now.get = now.nxt_ed - now.ed;
                if(now.get > 0)
                    pq.push(now);
            }
        }
        if(pq.empty()) break;
    }
    cout << ans << '\n';
}

Subtask #1
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -