Submission #959069

#	Time	Username	Problem	Language	Result	Execution time	Memory
959069		Abito	Arranging Tickets (JOI17_arranging_tickets)	C++17	10 / 100	6055 ms	4688 KiB

arranging_tickets

#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
#define int long long
#define ll long long
typedef unsigned long long ull;
using namespace std;
const int N=2e5+5;
int a[N],b[N],n,m,f[N];
int rec(int i,int mx){
    //cout<<i<<endl;
    //for (int j=0;j<n;j++) cout<<f[j]<<' ';cout<<endl<<endl;
    if (i>m) return mx;
    int x=mx;
    for (int j=a[i];j!=b[i];j=(j+1)%n){
        f[j]++;
        x=max(x,f[j]);
    }int ans=rec(i+1,x);
    for (int j=a[i];j!=b[i];j=(j+1)%n) f[j]--;
    x=mx;
    for (int j=b[i];j!=a[i];j=(j+1)%n){
        f[j]++;
        x=max(x,f[j]);
    }ans=min(ans,rec(i+1,x));
    for (int j=b[i];j!=a[i];j=(j+1)%n) f[j]--;
    return ans;
}
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    cin>>n>>m;
    for (int i=1;i<=m;i++){
        cin>>a[i]>>b[i];
        int c;cin>>c;
        a[i]--;
        b[i]--;
    }cout<<rec(1,0)<<endl;
    return 0;
}

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