Submission #893430

#	Time	Username	Problem	Language	Result	Execution time	Memory
893430		vjudge1	Event Hopping 2 (JOI21_event2)	C++17	0 / 100	53 ms	1884 KiB

event2

#include <bits/stdc++.h>
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
#define pb push_back
using namespace std;

signed main(){
    int n,k;
    cin>>n>>k;
    vector <int> a(n),b(n);
    for(int i=0;i<n;i++)cin>>a[i]>>b[i];
    for(int i=0;i<(1<<n);i++){
        vector <pair <int,int> > v;
        for(int j=0;j<n;j++){
            if((i & (1<<j))!=0){
                v.pb({a[j],b[j]});
            }
        }
        if(v.size()==k){
            sort(all(v));
            bool flag=true;
            for(int j=0;j<k;j++){
                if(j-1>=0 && v[j].ff<v[j-1].ss)flag=false;
            }
            if(flag){
                for(int j=0;j<n;j++){
                    if((i & (1<<j))!=0){
                        cout<<j+1<<"\n";
                    }
                }
                return 0;
            }
            
        }
    }
    cout<<-1<<"\n";
}

Compilation message (stderr)

event2.cpp: In function 'int main()':
event2.cpp:21:20: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   21 |         if(v.size()==k){
      |            ~~~~~~~~^~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 1
• Subtask 3: 0 / 31
• Subtask 4: 0 / 61