| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1182893 | lioow | Combo (IOI18_combo) | C++20 | 0 ms | 0 KiB |
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define pb push_back
#define int long long
#define repp(i,x,n) for(int i=x;i<=n;i++)
#define rep(i,x,n) for(int i=x;i>=n;i--)
#define cy cout<<"YES"<<endl
#define cn cout<<"NO"<<endl
#define r0 return 0
#define fi first
#define se second
#define liow ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define jelek cout<<"jelek"<<endl
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define pi pair<pair<int,int>,pair<int,int>>
#define p3 pair<int,pair<int,int>>
#define p2
#define tp tuple<int,int,int>
#define fl fflush(stdout)
#define lb long double
#define p5 pair<int,pair<pair<int,int>,pair<int,int>>>
#pragma GCC optimize ("O2")
#pragma GCC optimize ("unroll-loops")
using namespace std;
int dx[4]={-1,0,1,0};
int dy[4]={0,-1,0,1};
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
typedef tree<pair<int,int>, null_type, less<pair<int,int>>, rb_tree_tag, tree_order_statistics_node_update> ordered_multiset;
const int mod=1e9+7,maxn=1e5+5,N=5e5+5,INF=1e18;
const int MOD=998244353;
//const int MOD=1e6+3;
mt19937_64 rng((unsigned int) chrono::steady_clock::now().time_since_epoch().count());
pii dir[8]={{-1,0},{-1,1},{0,1},{1,1},{1,0},{1,-1},{0,-1},{-1,-1}};
string guess_sequence(int n){
string s="";
if(press("AB")){
if(press("A")) s+='A';
else s+='B';
} else {
if(press("X")) s+='X';
else s+='Y';
}
vector<char>v;
char a[4]={'A','B','X','Y'};
repp(i,0,3){
if(s[0]!=a[i]) v.pb(a[i]);
}
repp(i,1,n-2){
int ah=press(s+v[0]+s+v[1]+v[0]+s+v[1]+v[1]+s+v[1]+v[2]);
if(ah==(int)s.size()) s+=v[2];
else if(ah==(int)s.size()+2) s+=v[1];
else s+=v[0];
}
if(press(s+v[0])==(int)s.size()+1) s+=v[0];
else if(press(s+v[1])==(int)s.size()+1) s+=v[1];
else s+=v[2];
return s;
}
signed main(){
liow;
int t=1;
// cin>>t;
while(t--){
solve();
}
}