Submission #846794

#	Time	Username	Problem	Language	Result	Execution time	Memory
846794		Ahmed57	Inside information (BOI21_servers)	C++17	5 / 100	3556 ms	210600 KiB

servers

#include <bits/stdc++.h>
using namespace std;

int main(){
    int n,q;cin>>n>>q;
    vector<int> v[n+1];
    for(int i = 1;i<=n;i++)v[i].push_back(i);
    int cnt[n+1] = {0};
    for(int i = 1;i<=n;i++)cnt[i] = 1;
    q+=n-1;
    while(q--){
        char s;cin>>s;
        if(s=='S'){
            int a,b;cin>>a>>b;
            set<int> x;
            for(auto i:v[a]){x.insert(i);cnt[i]--;}
            for(auto i:v[b]){x.insert(i);cnt[i]--;}
            v[a].clear();v[b].clear();
            for(auto i:x){
                v[a].push_back(i);
                v[b].push_back(i);
                cnt[i]+=2;
            }
        }else if(s=='C'){
            int a;cin>>a;
            cout<<cnt[a]<<endl;
        }else{
            int a,b;cin>>a>>b;
            auto it = lower_bound(v[a].begin(),v[a].end(),b)-v[a].begin();
            if(it==v[a].size()||v[a][it]!=b)cout<<"no\n";
            else cout<<"yes\n";
        }
    }
}

Compilation message (stderr)

servers.cpp: In function 'int main()':
servers.cpp:30:18: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |             if(it==v[a].size()||v[a][it]!=b)cout<<"no\n";
      |                ~~^~~~~~~~~~~~~

• Subtask 1: 2.5 / 2.5
• Subtask 2: 2.5 / 2.5
• Subtask 3: 0 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 0 / 17.5
• Subtask 12: 0 / 17.5