Submission #322085

#	Time	Username	Problem	Language	Result	Execution time	Memory
322085		kwongweng	Combo (IOI18_combo)	C++14	100 / 100	52 ms	644 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
/*
string P = "AB";
int press(string S){
    int maxi = 0;
    for (int i = 0; i < S.size(); i++){
        int j = i, k = 0, cnt = 0;
        while (j < S.size() && k < P.size()){
        	if (S[j] != P[k]) break;
        	cnt++; j++; k++;
		}
        maxi = max(maxi, cnt);
    }
    cout << S << " " << maxi << '\n';
    return maxi;
}
*/
string guess_sequence(int n){
    string S = "";
	int a = press("AB");
  	if (a >= 1){
	    int b = press("A");
	    if (b == 1){
	        S += "A";
	    }else{
	        S += "B";
	    }
    }else{
        int b = press("X");
        if (b == 1) S += "X";
        else S += "Y";
    }
    if (n == 1) return S;
    string c = "ABXY";
    string ch = "";
    for (int i = 0; i < 4; i++){
        if (c[i] == S[0]) continue;
        ch += c[i];
    }
    for (int i = 1; i < n-1; i++){
        string ask = S + ch[0] + ch[0] + S + ch[0] + ch[1] + S + ch[0] + ch[2] + S + ch[1];
        int b = press(ask);
        if (b == i) S += ch[2];
        else if (b == i+1) S += ch[1];
        else S += ch[0];
    }
    int b = press(S + ch[0]);
    if (b == n) return S + ch[0];
	int d = press(S + ch[1]);
    if (d == n) return S + ch[1];
    else return S + ch[2];
}
/*
int main(){
	int n = P.size();
	string s = guess_sequence(n);
	cout << s << '\n';
	if (s == P) cout << "YES\n";
	else cout << "NO\n";
}
*/

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