Submission #565075

#	Time	Username	Problem	Language	Result	Execution time	Memory
565075		maomao90	Arranging Tickets (JOI17_arranging_tickets)	C++17	10 / 100	110 ms	332 KiB

arranging_tickets

// Hallelujah, praise the one who set me free
// Hallelujah, death has lost its grip on me
// You have broken every chain, There's salvation in your name
// Jesus Christ, my living hope
#include <bits/stdc++.h> 
using namespace std;

template <class T>
inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;}
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef vector<iii> viii;

#ifndef DEBUG
#define cerr if (0) cerr
#endif

const int INF = 1000000005;
const ll LINF = 1000000000000000005ll;
const int MAXN = 200005;

int n, m;
ii ab[MAXN];
int ev[MAXN];
int ans;

int main() {
#ifndef DEBUG
    ios::sync_with_stdio(0), cin.tie(0);
#endif
    cin >> n >> m;
    REP (i, 0, m) {
        int c; cin >> ab[i].FI >> ab[i].SE >> c;
        if (ab[i].FI > ab[i].SE) {
            swap(ab[i].FI, ab[i].SE);
        }
    }
    ans = INF;
    REP (i, 0, 1 << m) {
        cerr << i << '\n';
        REP (j, 0, m) {
            if (i >> j & 1) {
                ev[1]++;
                cerr << "+ " << 1 << '\n';
                ev[ab[j].FI]--;
                cerr << "- " << ab[j].FI << '\n';
                ev[ab[j].SE]++;
                cerr << "+ " << ab[j].SE << '\n';
            } else {
                ev[ab[j].FI]++;
                cerr << "+ " << ab[j].FI << '\n';
                ev[ab[j].SE]--;
                cerr << "- " << ab[j].SE << '\n';
            }
        }
        int sm = 0;
        int res = 0;
        REP (i, 1, n + 1) {
            sm += ev[i];
            cerr << ' ' << i << ' ' << sm << '\n';
            mxto(res, sm);
            ev[i] = 0;
        }
        mnto(ans, res);
    }
    cout << ans << '\n';
    return 0;
}

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