Submission #1311326

#	Time	Username	Problem	Language	Result	Execution time	Memory
1311326		theiulius	Combo (IOI18_combo)	C++20	10 / 100	17 ms	400 KiB

combo

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <string>
#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
#define pb push_back
#define endl "\n"

//namespace {
//
//constexpr int MAX_N = 2000;
//constexpr int MAX_NUM_MOVES = 8000;
//
//int N;
//std::string S;
//
//int num_moves;
//
//void wrong_answer(const char *MSG) {
//  printf("Wrong Answer: %s\n", MSG);
//  exit(0);
//}
//
//}  // namespace
//
//int press(std::string p) {
//  if (++num_moves > MAX_NUM_MOVES) {
//    wrong_answer("too many moves");
//  }
//  int len = p.length();
//  if (len > 4 * N) {
//    wrong_answer("invalid press");
//  }
//  for (int i = 0; i < len; ++i) {
//    if (p[i] != 'A' && p[i] != 'B' && p[i] != 'X' && p[i] != 'Y') {
//      wrong_answer("invalid press");
//    }
//  }
//  int coins = 0;
//  for (int i = 0, j = 0; i < len; ++i) {
//    if (j < N && S[j] == p[i]) {
//      ++j;
//    } else if (S[0] == p[i]) {
//      j = 1;
//    } else {
//      j = 0;
//    }
//    coins = std::max(coins, j);
//  }
//  return coins;
//}

string guess_sequence(int n) {
  	char letters[4] = {'A', 'B', 'X', 'Y'};
  	char first;
  	int ma = 0;
  	
  	string s = "";
  	for (int i = 0; i < n; i++){
  		s = s + "A";
	}
	for (int i = 0; i < 4; i++){
  		s[0] = letters[i];
  		int coins = press(s);
  		if (coins > ma){
  			ma = coins;
  			first = letters[i];
		}
	}
	
	s[0] = first;
//	for (int i = 0; i < n; i++){
//  		s[i] = first;
//	}
	
	for (int i = 1; i < n; i++){
		char best;
  		ma = 0;
		for (int k = 0; k < 4; k++){
			if (letters[k] == first){
				continue;
			}
	  		s[i] = letters[k];
	  		int coins = press(s);
	  		if (coins > ma){
	  			ma = coins;
	  			best = letters[k];
			}
		}
		
		s[i] = best;
	}
	
//	cout << s << endl;
	return s;
}

//int main() {
//  char buffer[MAX_N + 1];
//  if (scanf("%s", buffer) != 1) {
//    fprintf(stderr, "Error while reading input\n");
//    exit(1);
//  }
//  S = buffer;
//  N = S.length();
//
//  num_moves = 0;
//  std::string answer = guess_sequence(N);
//  if (answer != S) {
//    wrong_answer("wrong guess");
//    exit(0);
//  }
//  printf("Accepted: %d\n", num_moves);
//  return 0;
//}

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