Submission #241213

#	Time	Username	Problem	Language	Result	Execution time	Memory
241213		osaaateiasavtnl	Long Distance Coach (JOI17_coach)	C++17	0 / 100	5 ms	384 KiB

coach

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define f first
#define s second
#define Time (double)clock()/CLOCKS_PER_SEC
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif
    int x, n, m, w, t;
    cin >> x >> n >> m >> w >> t;

    //first - d, second - c

    vector <int> s(n);
    for (int i = 0; i < n; ++i) 
        cin >> s[i];
    s.app(x);
    s.insert(s.begin(), 0);

    vector <ii> a(m);
    for (int i = 0; i < m; ++i) 
        cin >> a[i].f >> a[i].s;

    sort(all(a));
    reverse(all(a));
    a.insert(a.begin(), mp(0, 0));

    auto getcnt = [&](int x, int d) {
        //d + k * t <= x
        //k * t <= x - d

        if (x < d)
            return 0ll;

        int k = (x-d)/t;
        return k + 1;
    };  
    auto get = [&](int i, int j) {
        int di = a[i].f, dj = a[j%a.size()].f;
        for (int p = 0; p + 1 < s.size(); ++p) {
            if (getcnt(s[p+1], di) > getcnt(s[p+1], dj) || (getcnt(s[p+1], di) == getcnt(s[p+1], dj) && di > dj)) {
                return a[i].s + (getcnt(s[p+1], di)-1)*w;
            }
        }
        return -1ll;
    };
    auto save = [&](int i) {
        if (i == a.size())
            return 0ll;
        int cnt = x/t+(a[i].f<=(x%t));
        return cnt * w;
    };

    int ans = -1;
    for (int mask = 0; mask < (1 << a.size()); ++mask) {
        if (!(mask & 1))
            continue;

        int prv = -1;
        int nn = 0;
        bool ban = 0;
        for (int i = 0; i < a.size(); ++i) {
            if ((mask >> i) & 1) {
                prv = i;
                nn += save(i);
            }   
            else {
                int add = get(i, prv);
                if (add == -1)
                    ban = 1;
                nn += add;
            }   
        }   
        if (ban)
            continue;

        if (nn < ans || ans == -1) {
            ans = nn;
        }   
    }   
    cout << ans << endl;
}

Compilation message (stderr)

coach.cpp: In lambda function:
coach.cpp:51:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int p = 0; p + 1 < s.size(); ++p) {
                         ~~~~~~^~~~~~~~~~
coach.cpp: In lambda function:
coach.cpp:59:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (i == a.size())
             ~~^~~~~~~~~~~
coach.cpp: In function 'int main()':
coach.cpp:73:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < a.size(); ++i) {
                         ~~^~~~~~~~~~

• Subtask 1: 0 / 16
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 29