# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
349481 | ezdp | Combo (IOI18_combo) | C++14 | 60 ms | 568 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include<bits/stdc++.h>
#include<combo.h>
#include<ext/pb_ds/assoc_container.hpp>
#define endl '\n'
#define pb push_back
#define fr first
#define sc second
#define ll long long int
#define ld long double
#define bit(idx) idx&(-idx)
#define bin(x) bitset<32>(x)
#define all(A) A.begin(), A.end()
#define de(x) cout << #x << " = " << x << endl;
#define row vector<ll>
#define row_matrix vector<ll>
#define matrix vector<row_matrix>
#define ordered_set_T ll
using namespace std;
using namespace __gnu_pbds;
typedef tree<ordered_set_T, null_type, less<ordered_set_T>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
/// find_by_order(x) -> x-th element in the set
/// order_of_key(x) -> how many elements are smaller than x
/// insert(x) -> inserts x into the set
string guess_sequence(int N){
string ans, qry;
ll tmp = press("AB");
if(tmp){
tmp = press("A");
if(tmp) ans += 'A';
else ans += 'B';
}
else{
tmp = press("X");
if(tmp) ans += 'X';
else ans += 'Y';
}
if(N == 1) return ans;
vector<char> v;
if(ans != "A") v.pb('A');
if(ans != "B") v.pb('B');
if(ans != "X") v.pb('X');
if(ans != "Y") v.pb('Y');
for(int i = 1; i + 1 < N; i ++){
qry = ans; qry += v[0];
qry += ans; qry += v[1]; qry += v[0];
qry += ans; qry += v[1]; qry += v[1];
qry += ans; qry += v[1]; qry += v[2];
tmp = press(qry);
if(tmp == ans.size() + 0) ans += v[2];
if(tmp == ans.size() + 1) ans += v[0];
if(tmp == ans.size() + 2) ans += v[1];
}
qry = ans; qry += v[0];
tmp = press(qry);
if(tmp == N) return qry;
qry = ans; qry += v[1];
tmp = press(qry);
if(tmp == N) return qry;
qry = ans; qry += v[2];
tmp = press(qry);
if(tmp == N) return qry;
}
/**
*/
Compilation message (stderr)
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