Submission #1023227

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023227		GrindMachine	Long Distance Coach (JOI17_coach)	C++17	46 / 100	2001 ms	412 KiB

coach

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

/*

refs:
edi

*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

void solve(int test_case)
{
    ll X,n,m,W,T; cin >> X >> n >> m >> W >> T;
    vector<ll> a(n+1); // refilling points
    rep(i,n) cin >> a[i]; 
    a[n] = X;
    n++;

    auto cmp = [&](ll x, ll y){
        return x%T < y%T;
    };

    sort(all(a),cmp);

    vector<pll> b(m+1); // passengers
    rep1(i,m) cin >> b[i].ff >> b[i].ss;
    b[0] = {0,inf2};
    sort(all(b));
    m++;

    vector<ll> dp(m,inf2); // dp[i] = min cost for [0..i] if i is the last alive guy
    dp[0] = ((X-1)/T+1)*W;

    rep1(i,m-1){
        auto [d,c] = b[i];
        ll times = (X-d-1)/T+1;
        ll smn = inf2;
        ll cost = 0;
        ll ptr = -1;
        rep(j,n){
            if(a[j]%T < b[i].ff){
                ptr = j;
            }
        }

        rev(j,i-1,0){
            amin(dp[i],dp[j]+cost);
            while(ptr >= 0 and a[ptr]%T > b[j].ff){
                amin(smn,a[ptr--]/T);
            }
            if(smn == inf2) break;
            cost += smn*W+b[j].ss;
        }

        dp[i] += times*W;
    }

    ll ans = inf2;

    rep(i,m){
        ll smn = inf2;
        ll cost = dp[i];

        rev(j,m-1,i+1){
            rep(k,n){
                if(b[j].ff < a[k]%T){
                    amin(smn,a[k]/T);
                }
            }
 
            if(smn == inf2){
                cost = inf2;
                break;
            }
 
            cost += smn*W+b[j].ss;
        }
 
        amin(ans,cost);
    }

    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

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