oj.uz

Submission #713136

# Submission time Handle Problem Language Result Execution time Memory
713136 2023-03-21T08:33:13 Z lmqzzz Combo (IOI18_combo) C++14
100 / 100
 33 ms 724 KB 
#include "combo.h"

#include <bits/stdc++.h>
using namespace std;

string button = "ABXY";

std::string guess_sequence(int N) {
        string ans = "";
        char first;
        if (press("AB")) {
                first = press("A") ? 'A' : 'B';
        } else {
                first = press("X") ? 'X' : 'Y';
        }
        for (int i = 0; i < 4; i++) {
                if (button[i] == first) {
                        button.erase(button.begin() + i);
                        break;
                }
        }
        // cerr << button << '\n';
        assert(button.size() == 3);
        ans += first;
        int special_case = 0;
        for (int j = 1; j <= N - 2; j++) {
                string ask = "";
                string aa = ans, ab = ans, ac = ans, ba = ans;
                if (special_case) aa += button[0];
                if (special_case) ab += button[0];
                if (special_case) ac += button[0];
                if (special_case) ba += button[0];
                aa = (aa + button[0]) + button[0];
                ab = (ab + button[0]) + button[1];
                ac = (ac + button[0]) + button[2];
                ba = (ba + button[1]) + button[0];
                ask = aa + ab + ac + ba;
                assert(ask.size() <= N * 4);
                int x = press(ask);
                // cerr << j << ' ' << special_case << ' ' << ask << ' ' << x << '\n';
                if (special_case) {
                        assert(x >= j - 1);
                        if (x == j - 1) {
                                ans += button[1];
                                ans += button[0];
                                special_case = 0;
                        } else if (x == j) {
                                ans += button[0];
                                ans += button[2];
                                special_case = 0;
                        } else if (x == j + 1) {
                                ans += button[0];
                                ans += button[1];
                                special_case = 0;
                        } else {
                                ans += button[0];
                        }
                } else {
                        assert(x >= j);
                        if (x == j) {
                                ans += button[2];
                        } else if (x == j + 1) {
                                ans += button[1];
                        } else {
                                special_case = 1;
                        }
                }
        }
        if (N == 1) return ans;
        if (special_case) {
                assert(ans.size() + 2 == N);
                string aa = (ans + button[0]) + button[0];
                string ab = (ans + button[0]) + button[1];
                string ac = (ans + button[0]) + button[2];
                string ba = (ans + button[1]) + button[0];
                if (press(aa + ab) == N) {
                        if (press(aa) == N) {
                                ans = aa;
                        } else {
                                ans = ab;
                        }
                } else {
                        if (press(ac) == N) {
                                ans = ac;
                        } else {
                                ans = ba;
                        }
                }
        } else {
                assert(ans.size() + 1 == N);
                if (press(ans + button[0]) == N) {
                        ans += button[0];
                } else if (press(ans + button[1]) == N) {
                        ans += button[1];
                } else {
                        ans += button[2];
                }
        }
        return ans;
}

Compilation message

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from combo.cpp:3:
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:38:35: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |                 assert(ask.size() <= N * 4);
      |                        ~~~~~~~~~~~^~~~~~~~
combo.cpp:71:39: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   71 |                 assert(ans.size() + 2 == N);
      |                        ~~~~~~~~~~~~~~~^~~~
combo.cpp:90:39: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   90 |                 assert(ans.size() + 1 == N);
      |                        ~~~~~~~~~~~~~~~^~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 0 ms 208 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 0 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 1 ms 208 KB Output is correct
17 Correct 0 ms 208 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 208 KB Output is correct
20 Correct 0 ms 208 KB Output is correct
21 Correct 0 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 0 ms 208 KB Output is correct
24 Correct 0 ms 208 KB Output is correct
25 Correct 0 ms 208 KB Output is correct
26 Correct 0 ms 208 KB Output is correct
27 Correct 1 ms 208 KB Output is correct
28 Correct 0 ms 208 KB Output is correct
29 Correct 0 ms 208 KB Output is correct
30 Correct 0 ms 208 KB Output is correct
31 Correct 1 ms 208 KB Output is correct
32 Correct 1 ms 208 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 0 ms 208 KB Output is correct
35 Correct 1 ms 208 KB Output is correct
36 Correct 0 ms 208 KB Output is correct

Subtask #2
95.0 / 95.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 0 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 0 ms 208 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 0 ms 208 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 0 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 0 ms 208 KB Output is correct
17 Correct 27 ms 496 KB Output is correct
18 Correct 25 ms 568 KB Output is correct
19 Correct 26 ms 592 KB Output is correct
20 Correct 30 ms 508 KB Output is correct
21 Correct 16 ms 496 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 1 ms 208 KB Output is correct
26 Correct 1 ms 208 KB Output is correct
27 Correct 1 ms 208 KB Output is correct
28 Correct 1 ms 208 KB Output is correct
29 Correct 2 ms 208 KB Output is correct
30 Correct 2 ms 452 KB Output is correct
31 Correct 3 ms 344 KB Output is correct
32 Correct 31 ms 564 KB Output is correct
33 Correct 26 ms 596 KB Output is correct
34 Correct 27 ms 496 KB Output is correct
35 Correct 27 ms 496 KB Output is correct
36 Correct 28 ms 600 KB Output is correct
37 Correct 33 ms 496 KB Output is correct
38 Correct 25 ms 492 KB Output is correct
39 Correct 28 ms 576 KB Output is correct
40 Correct 30 ms 492 KB Output is correct
41 Correct 25 ms 532 KB Output is correct
42 Correct 28 ms 648 KB Output is correct
43 Correct 32 ms 636 KB Output is correct
44 Correct 17 ms 500 KB Output is correct
45 Correct 15 ms 500 KB Output is correct
46 Correct 31 ms 672 KB Output is correct
47 Correct 30 ms 664 KB Output is correct
48 Correct 31 ms 700 KB Output is correct
49 Correct 24 ms 540 KB Output is correct
50 Correct 25 ms 536 KB Output is correct
51 Correct 22 ms 684 KB Output is correct
52 Correct 23 ms 508 KB Output is correct
53 Correct 33 ms 492 KB Output is correct
54 Correct 17 ms 496 KB Output is correct
55 Correct 27 ms 672 KB Output is correct
56 Correct 17 ms 500 KB Output is correct
57 Correct 28 ms 568 KB Output is correct
58 Correct 29 ms 488 KB Output is correct
59 Correct 30 ms 488 KB Output is correct
60 Correct 29 ms 592 KB Output is correct
61 Correct 29 ms 576 KB Output is correct
62 Correct 32 ms 552 KB Output is correct
63 Correct 31 ms 604 KB Output is correct
64 Correct 21 ms 612 KB Output is correct
65 Correct 25 ms 488 KB Output is correct
66 Correct 27 ms 588 KB Output is correct
67 Correct 24 ms 620 KB Output is correct
68 Correct 30 ms 556 KB Output is correct
69 Correct 29 ms 512 KB Output is correct
70 Correct 27 ms 644 KB Output is correct
71 Correct 29 ms 608 KB Output is correct
72 Correct 30 ms 524 KB Output is correct
73 Correct 31 ms 508 KB Output is correct
74 Correct 30 ms 592 KB Output is correct
75 Correct 33 ms 564 KB Output is correct
76 Correct 33 ms 504 KB Output is correct
77 Correct 24 ms 724 KB Output is correct
78 Correct 0 ms 208 KB Output is correct
79 Correct 1 ms 208 KB Output is correct
80 Correct 1 ms 208 KB Output is correct
81 Correct 1 ms 208 KB Output is correct
82 Correct 1 ms 208 KB Output is correct
83 Correct 1 ms 208 KB Output is correct
84 Correct 1 ms 208 KB Output is correct
85 Correct 1 ms 208 KB Output is correct
86 Correct 2 ms 208 KB Output is correct
87 Correct 2 ms 208 KB Output is correct
88 Correct 0 ms 208 KB Output is correct
89 Correct 1 ms 208 KB Output is correct
90 Correct 1 ms 208 KB Output is correct
91 Correct 0 ms 208 KB Output is correct
92 Correct 1 ms 208 KB Output is correct
93 Correct 1 ms 300 KB Output is correct
94 Correct 1 ms 208 KB Output is correct
95 Correct 1 ms 208 KB Output is correct
96 Correct 1 ms 208 KB Output is correct
97 Correct 1 ms 300 KB Output is correct
98 Correct 1 ms 300 KB Output is correct
99 Correct 1 ms 296 KB Output is correct
100 Correct 2 ms 300 KB Output is correct
101 Correct 1 ms 208 KB Output is correct
102 Correct 1 ms 208 KB Output is correct
103 Correct 2 ms 296 KB Output is correct
104 Correct 1 ms 300 KB Output is correct
105 Correct 1 ms 208 KB Output is correct
106 Correct 1 ms 208 KB Output is correct
107 Correct 1 ms 208 KB Output is correct
108 Correct 1 ms 208 KB Output is correct
109 Correct 1 ms 208 KB Output is correct
110 Correct 1 ms 208 KB Output is correct
111 Correct 0 ms 208 KB Output is correct
112 Correct 1 ms 208 KB Output is correct
113 Correct 0 ms 208 KB Output is correct
114 Correct 1 ms 208 KB Output is correct
115 Correct 1 ms 208 KB Output is correct
116 Correct 0 ms 208 KB Output is correct
117 Correct 1 ms 208 KB Output is correct
118 Correct 1 ms 296 KB Output is correct
119 Correct 1 ms 208 KB Output is correct
120 Correct 1 ms 208 KB Output is correct
121 Correct 1 ms 300 KB Output is correct
122 Correct 1 ms 296 KB Output is correct
123 Correct 1 ms 304 KB Output is correct