Submission #1208970

#	Time	Username	Problem	Language	Result	Execution time	Memory
1208970		mychecksedad	Long Distance Coach (JOI17_coach)	C++20	71 / 100	34 ms	31816 KiB

coach

/* Author : Mychecksdead  */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
#define pii pair<int,int>
#define vi vector<int>
const int N = 2005, M = 1e5+10, K = 52, MX = 30;
const ll INF = 1e18;

ll X, n, m, W, T, ans, pref[N];
ll s[N], DP[N], cost[N][N];
array<ll, 2> a[N];
void solve(){
  cin >> X >> n >> m >> W >> T;
  for(int i = 1; i <= n; ++i){
    cin >> s[i];
  }
  ans = X / T + 1;
  for(int i = 1; i <= m; ++i){
    cin >> a[i][0] >> a[i][1];
    ans += (X - a[i][0] + T - 1) / T;
  }
  ans *= W;
  sort(a+1, a+1+m); 

  pref[0] = 0;
  for(int i = 1; i <= m; ++i){
    pref[i] = pref[i - 1] + a[i][1];
  }

  for(int i = 0; i <= m; ++i){
    for(int j = 0; j <= m; ++j){
      cost[i][j] = INF;
    }
    DP[i] = 0;
  }

  s[n + 1] = X;
  for(int i = 1; i <= n + 1; ++i){
    int pos = lower_bound(a+1, a+1+m, array<ll, 2>{s[i] % T, -1}) - a;
    --pos;
    int r = pos;
    ll cur_sum = 0;
    for(int l = r; l >= 1; --l){
      cur_sum += (X - ((s[i] / T) * T + a[l][0]) + T - 1) / T;
      cost[l][r] = min(cost[l][r], - W * cur_sum);
      // cerr << i << ' ' <<  l << ' ' << r << ' ' << -W * cur_sum << ' ' << -W*cur_sum + pref[r]-pref[l-1] << '\n';
    }
  }
  // for(int i = 1; i <= m; ++i){
  //   for(int j = 1; j <= i; ++j){
  //     cerr << i << ' ' << j << ' ' << cost[j][i] << ' ' << cost[j][i] + pref[i] - pref[j - 1] << '\n';
  //   }
  //   cerr << '\n';
  // }

  for(int i = 1; i <= m; ++i){
    DP[i] = DP[i - 1];
    for(int j = 1; j <= i; ++j){
      DP[i] = min(DP[i], DP[j - 1] + cost[j][i] + pref[i] - pref[j - 1]);
    }
    // cerr << DP[i] << ' ';
  }
  cout << ans + DP[m];
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int tt = 1, aa;
  // freopen("in.txt", "r", stdin);
  // freopen("out.txt", "w", stdout);
  while(tt--){
    solve();
    en;
  }
  cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
  return 0;
} 

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