Submission #888713

#	Time	Username	Problem	Language	Result	Execution time	Memory
888713		vjudge1	Passport (JOI23_passport)	C++17	0 / 100	1 ms	348 KiB

passport

#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(){
    ios_base::sync_with_stdio();
    cin.tie(0);
    int n;
    cin>>n;
    vector <int> l(n),r(n);
    for(int i=0;i<n;i++)cin>>l[i]>>r[i];
    vector <int> a,b,c;
    for(int i=0;i<n;i++){
        for(int j=l[i];j<=r[i];j++){
            a.pb(i+1);
            b.pb(j);
            c.pb(1);
        }
    }
    
    int q;cin>>q;
    set <pair <int,int> > st;
    vector <int> ans;
    while(q--){
        int x;cin>>x;
        vector <int> d(n+1,1e9),p(n+1);
        d[x]=0;
        for(int i=0;i<n;i++){
            for(int j=0;j<a.size();j++){
                if(d[a[j]]!=1e9 && d[b[j]]>d[a[j]]+c[j]){
                    d[b[j]]=d[a[j]]+c[j];
                    p[b[j]]=a[j];
                }
            }
        }
        int mx=0;
        set <int> s;
        for(int i=1;i<=n;i++){
            mx=max(mx,d[i]);
            if(d[i]==1e9)break;
            int curv=i;
            while(curv!=x){
                curv=p[curv];
                s.insert(curv);
                
            }
        }
        if(mx==1e18)cout<<-1<<"\n";
        else cout<<s.size()<<"\n";
    }
    
}

Compilation message (stderr)

passport.cpp: In function 'int main()':
passport.cpp:33:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |             for(int j=0;j<a.size();j++){
      |                         ~^~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46