Submission #205397

#	Time	Username	Problem	Language	Result	Execution time	Memory
205397		extraterrestrial	Arranging Tickets (JOI17_arranging_tickets)	C++14	10 / 100	140 ms	504 KiB

arranging_tickets

#include <bits/stdc++.h>
typedef long long ll;
typedef long double ld;
using namespace std;
#define F first
#define S second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define SZ(x) (int)(x).size()
//#define int ll

const int N = 25;
int a[N], b[N], c[N], d[N];

void add(int l, int r, int delta) {
  d[l] += delta;
  d[r + 1] -= delta;
}

signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
	int n, m;
  cin >> n >> m;
  int ans = 0;
  for (int i = 0; i < m; i++) {
    cin >> a[i] >> b[i] >> c[i];
    ans += c[i];
    if (a[i] > b[i]) {
      swap(a[i], b[i]);
    }
  }  
  for (int mask = 0; mask < (1 << m); mask++) {
    for (int i = 0; i <= n; i++) {
      d[i] = 0;
    }
    for (int i = 0; i < m; i++) {
      if ((mask >> i) & 1) {
        add(a[i], b[i] - 1, c[i]);
      }
      else {
        add(1, a[i] - 1, c[i]);
        add(b[i], n, c[i]);
      }
    }
    int cur = 0, mx = 0;
    for (int i = 1; i <= n; i++) {
      cur += d[i];
      mx = max(mx, cur);
    }
    ans = min(ans, mx);
  }
  cout << ans << '\n';
} 

• Subtask 1: 10 / 10
• Subtask 2: 0 / 35
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 15