Submission #831435

#	Time	Username	Problem	Language	Result	Execution time	Memory
831435		Paul_Liao_1457	Arranging Tickets (JOI17_arranging_tickets)	C++17	0 / 100	1 ms	212 KiB

arranging_tickets

#include<iostream>
#include<array>
#include<vector>
#include<string>
#include<algorithm>
#include<set>
#include<queue>
#include<stack>
#include<math.h>
#include<map>
#include<unordered_map>
#include<cstring>
#include<iomanip>
#include<bitset>
#include<tuple>
#include<chrono>
#include<random>

#define ll long long
#define DB double
#define pii pair<int, int>
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i>=b;i--)
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define INF (ll)(1e9+5)
#define MOD (ll)(998244353)
#define endl "\n"
#define AC ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define N 200005
#define M 200005

using namespace std;

int sum[N];
int n, m; 

int used[N];

pair<int, int>  find(int maxn) {
    int l = n+1, r = 1;
    FOR(i, 1, n+1) {
        if (sum[i] >= maxn - 1) {
            l = min(l, i);
            r = max(r, i);
        }
    }
    return mp(l, r);
}

int main() {
    AC;

    cin >> n >> m;

    int maxn = 0;
    ll ans = 0;

    vector<pair<int, int> > v;

    FOR(i, 0, m) {
        int a, b, c; cin >> a >> b >> c;
        if (a > b) swap(a, b);

        ans += c / 2;
        c %= 2;
        if (!c) continue;

        v.pb(mp(a, b));

        FOR(j, a, b) {
            sum[j]++;
            maxn = max(maxn, sum[j]);
        }

    }

    int l, r;

    while (1) {
       pair<int, int> tmp = find(maxn); 
       l = tmp.F; r = tmp.S;

       bool ok = 0;

       FOR(i, 0, v.size()) {
           if (!used[i]){
               if (v[i].F <= l && v[i].S > r) {
                   ok = 1;
                   used[i] = 1;
                   maxn--;
                   FOR(j, 1, n+1) {
                       if (v[i].F <= j && j < v[i].S) sum[j]--;
                       else sum[j]++;
                   }
                   break;
               }
           } else {
               bool ck = 1;
               FOR(j, v[i].F, v[i].S) {
                   if (sum[j] >= maxn - 1) {
                       ck = 0;
                       break;
                   }
               }
               if (ck) {
                   ok = 1;
                   used[i] = 0;
                   maxn--;
                   FOR(j, 1, n+1) {
                       if (v[i].F <= j && j < v[i].S) sum[j]++;
                       else sum[j]--;
                   }
                   break;
               }
           }

       }
       if (!ok) break;
    }

    cout << ans + maxn << endl;
}

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