Submission #1066432

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066432		guanex	Combo (IOI18_combo)	C++14	30 / 100	26 ms	852 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>

using namespace std;

typedef pair<int, int> ii;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<long long, long long> pll;
typedef pair<char, int> ci;
typedef pair<string, int> si;
typedef long double ld;
typedef vector<int> vi;
typedef vector<string> vs;
#define pb push_back
#define fi first
#define se second
#define whole(v) v.begin(), v.end()
#define rwhole(v) v.rbegin(), v.rend()
#define inf INT_MAX/2
#define fro front


std::string guess_sequence(int N) {
    string s;
    char fi;
    int c = press("A");
    if(c){
    fi = 'A';
    }else{
    c = press("B");
    if(c){
        fi = 'B';
    }else{
        c = press("X");
        if(c){
            fi = 'X';
        }else{
            fi = 'Y';
        }
    }
    }
    char x = 'Y';
    if(fi == 'Y'){
    x = 'X';
    }
    char y = 'B';
    if(fi == 'B'){
    y = 'X';
    }
    char z = 'A';
    if(fi == 'A'){
    z = 'X';
    }
    s.pb(fi);
    int lc = 1;
    for(int i = 1; i < N; ++i){
        string ss = s;
        ss.pb(y);
        c = press(ss);
        ss.pop_back();
        if(c > lc){
            s.pb(y);
            lc = c;
        }else{
            ss.pb(z);
            c = press(ss);
            if(c > lc){
                s.pb(z);
                lc = c;
            }else{
                s.pb(x);
                lc++;
            }
        }
    }
    //cout << s << endl;
    return s;
}

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95