Submission #677099

#	Time	Username	Problem	Language	Result	Execution time	Memory
677099		Toxtaq	Combo (IOI18_combo)	C++17	30 / 100	46 ms	452 KiB

combo

#include<bits/stdc++.h>
using namespace std;
//string S;
//int num_moves = 0;
//constexpr int MAX_N = 2000;
//constexpr int MAX_NUM_MOVES = 8000;
//
//void wrong_answer(const char *MSG) {
//  printf("Wrong Answer: %s\n", MSG);
//  exit(0);
//}
//int N;
//
//int cnt = 0;
//int press(std::string p) {
//    cnt++;
//  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;
//}
int press(string s);
string guess_sequence(int N){
    string s;
    string d;
    if(press("A") == 1){d = "BXY";s += 'A';}
    else if(press("B") == 1){d = "AXY";s += 'B';}
    else if(press("X") == 1){d = "ABY";s += 'X';}
    else {d = "ABX";s += 'Y';}
//    cout << d << '\n';
    for(int i = 1;i < N;++i){
        if(press(s + d[0]) == s.length() + 1)s += d[0];
        else if(press(s + d[1]) == s.length() + 1)s += d[1];
        else s += d[2];
    }
    return s;
}
//int main()
//{
//    S = "XAAA";
//    for(int i = 0;i < 1999;++i)S += 'Y';
//    N = S.length();
//    cout << guess_sequence(S.length());
//    cout << endl << S.length() << " " << num_moves;
//}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:52:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         if(press(s + d[0]) == s.length() + 1)s += d[0];
      |            ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:53:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         else if(press(s + d[1]) == s.length() + 1)s += d[1];
      |                 ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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