Submission #863653

#	Time	Username	Problem	Language	Result	Execution time	Memory
863653		Ahmed_Solyman	Inside information (BOI21_servers)	C++14	5 / 100	3564 ms	378684 KiB

servers

/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
    return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
    cout<<(x?"yes":"no")<<endl;
}
int main()
{
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    #ifndef ONLINE_JUDGE
    //freopen("input.in", "r", stdin);
    //freopen("output.out", "w", stdout);
    #endif
    fast
    int n,q;cin>>n>>q;
    q+=n;
    q--;
    set<int>adj[n+5];
    for(int i=1;i<=n;i++)adj[i].insert(i);
    vector<int>cnt(n+5,1);
    while(q--){
        char c;cin>>c;
        if(c=='S'){
            int a,b;cin>>a>>b;
            for(int i=1;i<=n;i++){
                if(adj[b].find(i)!=adj[b].end()){
                    int u=adj[a].size();
                    adj[a].insert(i);
                    if(adj[a].size()==u+1)cnt[i]++;
                }
                if(adj[a].find(i)!=adj[a].end()){
                    int u=adj[b].size();
                    adj[b].insert(i);
                    if(adj[b].size()==u+1)cnt[i]++;
                }
            }
        }
        else if(c=='Q'){
            int a,b;cin>>a>>b;
            bool ok=adj[a].find(b)!=adj[a].end();
            person_bool(ok);
        }
        else{
            int d;cin>>d;
            cout<<cnt[d]<<endl;
        }
    }
    return 0;
}

Compilation message (stderr)

servers.cpp: In function 'int main()':
servers.cpp:61:37: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   61 |                     if(adj[a].size()==u+1)cnt[i]++;
      |                        ~~~~~~~~~~~~~^~~~~
servers.cpp:66:37: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   66 |                     if(adj[b].size()==u+1)cnt[i]++;
      |                        ~~~~~~~~~~~~~^~~~~

• 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