Submission #292098

#	Time	Username	Problem	Language	Result	Execution time	Memory
292098		Hehehe	Semiexpress (JOI17_semiexpress)	C++14	100 / 100	8 ms	416 KiB

semiexpress

#include<bits/stdc++.h> //:3
using namespace std;
typedef long long ll;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define pi pair<int, int>
#define sz(x) (int)((x).size())
#define int long long

const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};

const ll inf = 2e9;
const ll mod = 1e9 + 7;
const int N = 2e5 + 11;
const int X = 1e6;
const ll INF64 = 3e18 + 1;
const double eps = 1e-14;
const double PI = acos(-1);

//ifstream in(".in");
//ofstream out(".out");

int n, k, m, a, b, c, t, v[N], w[N];

void solve(){

    cin >> n >> m >> k >> a >> b >> c >> t;

    k -= m;

    for(int i = 1; i <= m; i++){
        cin >> v[i];
    }

    for(int i = 1; i <= m; i++){

        int timp = b*(v[i] - 1);

        if(timp > t){
            w[i] = -1; //cant reach
            continue;
        }

        if(i != m)w[i] = min((t - timp) / a, v[i + 1] - v[i] - 1); //number of position we can reach starting from v[i]
    }

    while(k--){

        int pos = 0, mx = 0;

        for(int i = 1; i <= m; i++){

            if(w[i] == -1 || v[i + 1] - v[i] - 1 == w[i])continue; //no need to add semiexpress

            int timp = b*(v[i] - 1) + c*(w[i] + 1);

            if(timp > t)continue;

            int more = min((t - timp) / a + 1, v[i + 1] - (v[i] + w[i] + 1));

            if(more > mx){
                mx = more;
                pos = i;
            }
        }

        w[pos] += mx;
    }

    int ans = 0;

    for(int i = 1; i <= m; i++){
        ans += (w[i] + 1);
        //cout << w[i] + 1 << ' ';
    }//cout << '\n';

    cout << ans - 1 << '\n';

}

int32_t main(){
ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);

    //cout << setprecision(6) << fixed;

    int T = 1;
    //cin >> T;
    while(T--){
        solve();
    }
}

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