Submission #428385

#	Time	Username	Problem	Language	Result	Execution time	Memory
428385		SAAD	Combo (IOI18_combo)	C++17	0 / 100	1 ms	200 KiB

combo

#define F first
#define S second
#define rep(i,a,b) for(int i=a;!(a==b&&i!=b)&&((i<=b&&b>=a)||(i>=b&&a>=b));i+=(a<=b?1:-1))
#define pb push_back
#define Fbitl __builtin_ffs
#define bit1 __builtin_popcount
//#include <bits/stdc++.h>
#include <iostream>
#include <math.h>
#include <algorithm>
#include <string.h>
#include <vector>
#include <queue>
#include <map>
#include <unordered_map>
#include "combo.h"
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<string, string> pss;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<vl> vvl;
//press(string);
string sw = " ABXY" ;
int fidx ;
string guess_sequence(int N) {
    if ( press("ABA") ) {
        if ( press("B") ) fidx = 2 ;
        else fidx = 1 ;
    }
    else {
         if ( press("X") ) fidx = 3 ;
        else fidx = 4 ;
    }
    string res = { sw[fidx] } , t ;
    if ( N == 1 ) return res ;
    for (int j = 1;j<N;j++) {
        t += ' ';
        for ( int i = 1 ; i <= 4 ; i++ ) {
            if ( i == fidx ) continue;
            if ( i == 4 || (i == 3&&fidx==4)) {
                res += sw[i];
                break;
            }
            t[j] = sw[i];
            if ( press(t) == j+1 ) {
                res += sw[i];
                break;
            }
        }
    }
    return res;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95