| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 884468 |
2023-12-07T12:21:16 Z |
gustavo_d |
Combo (IOI18_combo) |
C++17 |
|
14 ms |
1792 KB |
// https://oj.uz/problem/view/IOI18_combo > p152
#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
/*
botões A,B,X,Y no jogo, você pode fazer combos apertando + de um juntos
tem uma sequência secreta S de N chars
primeiro char dela nunca repete, bruta A, B, C, D (AABB, CCDD > o que for, você tenta um e se n é o outro; custo 3) > sobra 3 possibilidades pro resto; sendo A, ABAC se n for é o AD, se não tenta tipo AB se nao for é o AC (custo 2n-2)
você deve digitar até 4N chars, sua pontuação é o tamanho do maior prefixo de S que é substring da sequência sua
após o mínimo de combos 4N, você deve descobrir S
custo total: 2n-2+2 = 2n
pode chamar press com 0 a 4N chars até 8000 vezes e N até 2000
q<=N+2
O(n)
primeira: 4 chamadas, testa primeiro char
2N: só sobra 3 possibilidades pra cada char (primeiro não repete), aí vocẽ testa primeiro com segundo se for, testa 1 se não for é o outro; se não é os 2, é o 3o
*/
string guess_sequence(int N) {
string S = "";
string p = "AB";
int coins = press(p);
if (coins == 0) { // ou X out Y
p = "X";
coins = press(p);
if (coins == 0) S = "Y";
else S = "X";
} else {
p = "A";
coins = press(p);
if (coins == 0) S = "B";
else S = "A";
}
vector<char> others;
if ('A' != S[0]) others.push_back('A');
if ('B' != S[0]) others.push_back('B');
if ('X' != S[0]) others.push_back('X');
if ('Y' != S[0]) others.push_back('Y');
for (int i = 0; i < N-1; i++) {
p = "" + S;
p += others[0];
p += S;
p += others[1];
if (i < N-2) {
p += others[0];
p += S; p += others[1]; p += others[1];
p += S; p += others[1]; p += others[2];
coins = press(p);
if (coins == (int)S.size() + 1) S += others[0];
else if (coins == (int)S.size() + 2) S += others[1];
else S += others[2];
} else {
coins = press(p);
if (coins == (int)S.size()) S += others[2]; // sem query extra descobre
else { // precisa já na primeira descobrir se é o primeiro ou o segundo char (se der no segundo char coloca a combinação dos 3 chars depois além dele) >> 4N dá sempre
p = "" + S;
p += others[0];
coins = press(p);
if (coins == (int)S.size()) S += others[1];
else S += others[0];
}
}
}
return S;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
1 ms |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
344 KB |
Output is correct |
| 14 |
Correct |
0 ms |
344 KB |
Output is correct |
| 15 |
Correct |
0 ms |
344 KB |
Output is correct |
| 16 |
Correct |
0 ms |
344 KB |
Output is correct |
| 17 |
Correct |
0 ms |
344 KB |
Output is correct |
| 18 |
Correct |
0 ms |
344 KB |
Output is correct |
| 19 |
Correct |
0 ms |
344 KB |
Output is correct |
| 20 |
Correct |
0 ms |
344 KB |
Output is correct |
| 21 |
Correct |
0 ms |
344 KB |
Output is correct |
| 22 |
Correct |
0 ms |
344 KB |
Output is correct |
| 23 |
Correct |
0 ms |
344 KB |
Output is correct |
| 24 |
Correct |
0 ms |
344 KB |
Output is correct |
| 25 |
Correct |
0 ms |
344 KB |
Output is correct |
| 26 |
Correct |
0 ms |
344 KB |
Output is correct |
| 27 |
Correct |
0 ms |
340 KB |
Output is correct |
| 28 |
Correct |
0 ms |
344 KB |
Output is correct |
| 29 |
Correct |
1 ms |
344 KB |
Output is correct |
| 30 |
Correct |
0 ms |
344 KB |
Output is correct |
| 31 |
Correct |
0 ms |
344 KB |
Output is correct |
| 32 |
Correct |
0 ms |
344 KB |
Output is correct |
| 33 |
Correct |
1 ms |
596 KB |
Output is correct |
| 34 |
Correct |
0 ms |
344 KB |
Output is correct |
| 35 |
Correct |
1 ms |
344 KB |
Output is correct |
| 36 |
Correct |
0 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
344 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
0 ms |
344 KB |
Output is correct |
| 4 |
Correct |
0 ms |
344 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
344 KB |
Output is correct |
| 7 |
Correct |
0 ms |
344 KB |
Output is correct |
| 8 |
Correct |
0 ms |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
344 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 KB |
Output is correct |
| 11 |
Correct |
0 ms |
344 KB |
Output is correct |
| 12 |
Correct |
0 ms |
344 KB |
Output is correct |
| 13 |
Correct |
0 ms |
344 KB |
Output is correct |
| 14 |
Correct |
0 ms |
344 KB |
Output is correct |
| 15 |
Correct |
1 ms |
344 KB |
Output is correct |
| 16 |
Correct |
1 ms |
344 KB |
Output is correct |
| 17 |
Correct |
12 ms |
1192 KB |
Output is correct |
| 18 |
Correct |
12 ms |
1192 KB |
Output is correct |
| 19 |
Correct |
11 ms |
1392 KB |
Output is correct |
| 20 |
Correct |
12 ms |
1608 KB |
Output is correct |
| 21 |
Correct |
11 ms |
1476 KB |
Output is correct |
| 22 |
Correct |
1 ms |
344 KB |
Output is correct |
| 23 |
Correct |
1 ms |
436 KB |
Output is correct |
| 24 |
Correct |
0 ms |
432 KB |
Output is correct |
| 25 |
Correct |
1 ms |
692 KB |
Output is correct |
| 26 |
Correct |
1 ms |
448 KB |
Output is correct |
| 27 |
Correct |
1 ms |
440 KB |
Output is correct |
| 28 |
Correct |
1 ms |
704 KB |
Output is correct |
| 29 |
Correct |
1 ms |
440 KB |
Output is correct |
| 30 |
Correct |
1 ms |
956 KB |
Output is correct |
| 31 |
Correct |
1 ms |
692 KB |
Output is correct |
| 32 |
Correct |
12 ms |
1224 KB |
Output is correct |
| 33 |
Correct |
13 ms |
1568 KB |
Output is correct |
| 34 |
Correct |
11 ms |
1532 KB |
Output is correct |
| 35 |
Correct |
10 ms |
892 KB |
Output is correct |
| 36 |
Correct |
13 ms |
1352 KB |
Output is correct |
| 37 |
Correct |
10 ms |
1144 KB |
Output is correct |
| 38 |
Correct |
12 ms |
1516 KB |
Output is correct |
| 39 |
Correct |
11 ms |
1204 KB |
Output is correct |
| 40 |
Correct |
14 ms |
1792 KB |
Output is correct |
| 41 |
Correct |
10 ms |
1280 KB |
Output is correct |
| 42 |
Correct |
11 ms |
1248 KB |
Output is correct |
| 43 |
Correct |
10 ms |
1336 KB |
Output is correct |
| 44 |
Correct |
13 ms |
1332 KB |
Output is correct |
| 45 |
Correct |
11 ms |
1704 KB |
Output is correct |
| 46 |
Correct |
14 ms |
1088 KB |
Output is correct |
| 47 |
Correct |
10 ms |
1356 KB |
Output is correct |
| 48 |
Correct |
11 ms |
1744 KB |
Output is correct |
| 49 |
Correct |
12 ms |
1044 KB |
Output is correct |
| 50 |
Correct |
13 ms |
1344 KB |
Output is correct |
| 51 |
Correct |
11 ms |
1028 KB |
Output is correct |
| 52 |
Correct |
11 ms |
1540 KB |
Output is correct |
| 53 |
Correct |
11 ms |
1392 KB |
Output is correct |
| 54 |
Correct |
11 ms |
1456 KB |
Output is correct |
| 55 |
Correct |
11 ms |
1252 KB |
Output is correct |
| 56 |
Correct |
11 ms |
1292 KB |
Output is correct |
| 57 |
Correct |
10 ms |
1408 KB |
Output is correct |
| 58 |
Correct |
12 ms |
1088 KB |
Output is correct |
| 59 |
Correct |
11 ms |
1156 KB |
Output is correct |
| 60 |
Correct |
11 ms |
1484 KB |
Output is correct |
| 61 |
Correct |
12 ms |
1384 KB |
Output is correct |
| 62 |
Correct |
10 ms |
1476 KB |
Output is correct |
| 63 |
Correct |
10 ms |
1136 KB |
Output is correct |
| 64 |
Correct |
11 ms |
1352 KB |
Output is correct |
| 65 |
Correct |
12 ms |
1100 KB |
Output is correct |
| 66 |
Correct |
12 ms |
1160 KB |
Output is correct |
| 67 |
Correct |
13 ms |
1276 KB |
Output is correct |
| 68 |
Correct |
10 ms |
1288 KB |
Output is correct |
| 69 |
Correct |
11 ms |
972 KB |
Output is correct |
| 70 |
Correct |
13 ms |
1224 KB |
Output is correct |
| 71 |
Correct |
11 ms |
1648 KB |
Output is correct |
| 72 |
Correct |
11 ms |
1624 KB |
Output is correct |
| 73 |
Correct |
10 ms |
1392 KB |
Output is correct |
| 74 |
Correct |
12 ms |
1276 KB |
Output is correct |
| 75 |
Correct |
11 ms |
1404 KB |
Output is correct |
| 76 |
Correct |
12 ms |
1088 KB |
Output is correct |
| 77 |
Correct |
12 ms |
1372 KB |
Output is correct |
| 78 |
Correct |
0 ms |
344 KB |
Output is correct |
| 79 |
Correct |
1 ms |
344 KB |
Output is correct |
| 80 |
Correct |
1 ms |
344 KB |
Output is correct |
| 81 |
Correct |
0 ms |
344 KB |
Output is correct |
| 82 |
Correct |
0 ms |
344 KB |
Output is correct |
| 83 |
Correct |
0 ms |
344 KB |
Output is correct |
| 84 |
Correct |
0 ms |
344 KB |
Output is correct |
| 85 |
Correct |
0 ms |
436 KB |
Output is correct |
| 86 |
Correct |
0 ms |
432 KB |
Output is correct |
| 87 |
Correct |
0 ms |
600 KB |
Output is correct |
| 88 |
Correct |
0 ms |
344 KB |
Output is correct |
| 89 |
Correct |
0 ms |
344 KB |
Output is correct |
| 90 |
Correct |
0 ms |
344 KB |
Output is correct |
| 91 |
Correct |
0 ms |
344 KB |
Output is correct |
| 92 |
Correct |
1 ms |
344 KB |
Output is correct |
| 93 |
Correct |
0 ms |
344 KB |
Output is correct |
| 94 |
Correct |
0 ms |
596 KB |
Output is correct |
| 95 |
Correct |
1 ms |
432 KB |
Output is correct |
| 96 |
Correct |
1 ms |
436 KB |
Output is correct |
| 97 |
Correct |
1 ms |
432 KB |
Output is correct |
| 98 |
Correct |
1 ms |
432 KB |
Output is correct |
| 99 |
Correct |
0 ms |
432 KB |
Output is correct |
| 100 |
Correct |
1 ms |
436 KB |
Output is correct |
| 101 |
Correct |
0 ms |
436 KB |
Output is correct |
| 102 |
Correct |
0 ms |
436 KB |
Output is correct |
| 103 |
Correct |
1 ms |
436 KB |
Output is correct |
| 104 |
Correct |
1 ms |
432 KB |
Output is correct |
| 105 |
Correct |
1 ms |
344 KB |
Output is correct |
| 106 |
Correct |
0 ms |
344 KB |
Output is correct |
| 107 |
Correct |
0 ms |
344 KB |
Output is correct |
| 108 |
Correct |
0 ms |
344 KB |
Output is correct |
| 109 |
Correct |
0 ms |
344 KB |
Output is correct |
| 110 |
Correct |
0 ms |
344 KB |
Output is correct |
| 111 |
Correct |
0 ms |
344 KB |
Output is correct |
| 112 |
Correct |
1 ms |
344 KB |
Output is correct |
| 113 |
Correct |
0 ms |
344 KB |
Output is correct |
| 114 |
Correct |
0 ms |
344 KB |
Output is correct |
| 115 |
Correct |
0 ms |
344 KB |
Output is correct |
| 116 |
Correct |
1 ms |
344 KB |
Output is correct |
| 117 |
Correct |
0 ms |
344 KB |
Output is correct |
| 118 |
Correct |
1 ms |
344 KB |
Output is correct |
| 119 |
Correct |
1 ms |
436 KB |
Output is correct |
| 120 |
Correct |
0 ms |
436 KB |
Output is correct |
| 121 |
Correct |
0 ms |
436 KB |
Output is correct |
| 122 |
Correct |
1 ms |
684 KB |
Output is correct |
| 123 |
Correct |
0 ms |
688 KB |
Output is correct |
