Submission #1322320

#	Time	Username	Problem	Language	Result	Execution time	Memory
1322320		cesh	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include "combo.h"

using namespace std;
using ll = long long;

string guess_sequence(ll n) {
    vector<vector<ll>> is(n, vector<ll>(4));
    string f = "AX";
    ll c = press(f);
    string ans;
    vector<char> g;
    if (c >= 1) {
        f = "A";
        c = press(f);
        if (c >= 1) {
            for (ll i = 1; i < n; i++) is[i][0] = 1;
            ans.push_back('A');
            g.push_back('X');
            g.push_back('B');
            g.push_back('Y');
        } else {
            for (ll i = 1; i < n; i++) is[i][1] = 1;
            ans.push_back('X');
            g.push_back('A');
            g.push_back('B');
            g.push_back('Y');
        }
    } else {
        f = "B";
        c = press(f);
        if (c >= 1) {
            for (ll i = 1; i < n; i++) is[i][0] = 1;
            ans.push_back('B');
            g.push_back('A');
            g.push_back('X');
            g.push_back('Y');
        } else {
            for (ll i = 1; i < n; i++) is[i][1] = 1;
            ans.push_back('Y');
            g.push_back('A');
            g.push_back('X');
            g.push_back('B');
        }
    }
    for (ll i = 1; i < n - 1; i++) {
        string f = ans + g[0] + ans + g[1] + g[0] + ans + g[1] + g[1] + ans + g[1] + g[2];
        c = press(f);
        if (c >= ans.size() + 2) ans.push_back(g[1]);
        else if (c >= ans.size() + 1) ans.push_back(g[0]);
        else ans.push_back(g[2]);
    }
    c = press(ans + g[0]);
    if (c >= ans.size() + 1) ans.push_back(g[0]);
    else {
        c = press(ans + g[1]);
        if (c >= ans.size() + 1) ans.push_back(g[1]);
        else ans.push_back(g[2]);
    }
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(ll)':
combo.cpp:7:12: error: 'vector' was not declared in this scope
    7 |     vector<vector<ll>> is(n, vector<ll>(4));
      |            ^~~~~~
combo.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include "combo.h"
  +++ |+#include <vector>
    2 | 
combo.cpp:7:21: error: expected primary-expression before '>' token
    7 |     vector<vector<ll>> is(n, vector<ll>(4));
      |                     ^~
combo.cpp:7:39: error: expected primary-expression before '>' token
    7 |     vector<vector<ll>> is(n, vector<ll>(4));
      |                                       ^
combo.cpp:7:24: error: 'is' was not declared in this scope
    7 |     vector<vector<ll>> is(n, vector<ll>(4));
      |                        ^~
combo.cpp:11:12: error: expected primary-expression before 'char'
   11 |     vector<char> g;
      |            ^~~~
combo.cpp:18:13: error: 'g' was not declared in this scope
   18 |             g.push_back('X');
      |             ^
combo.cpp:24:13: error: 'g' was not declared in this scope
   24 |             g.push_back('A');
      |             ^
combo.cpp:34:13: error: 'g' was not declared in this scope
   34 |             g.push_back('A');
      |             ^
combo.cpp:40:13: error: 'g' was not declared in this scope
   40 |             g.push_back('A');
      |             ^
combo.cpp:46:26: error: 'g' was not declared in this scope
   46 |         string f = ans + g[0] + ans + g[1] + g[0] + ans + g[1] + g[1] + ans + g[1] + g[2];
      |                          ^
combo.cpp:52:21: error: 'g' was not declared in this scope
   52 |     c = press(ans + g[0]);
      |                     ^