Submission #1104867

#	Time	Username	Problem	Language	Result	Execution time	Memory
1104867		monaxia	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
#define pb push_back
#define ppb pop_back
#define fr first
#define sc second
#define all(v) v.begin(), v.end()
#define eps (long long)(1e-9)
using namespace std;
 
using ll = long long;
using ull = unsigned long long;
using ld = long double;

const ll Mod = 1e9 + 7;

string guess_sequence(int n){
    string ans = "", temp = "ABXY";
    int cnt = 0;

    while(cnt != n){
        for(auto& x : temp){
            ans.pb(ans);
            if(press(ans) > cnt){
                cnt ++;
                break;
            }

            ans.pp();
        }
    }

    return ans;
}   

// signed main()
// {
//     cin.tie(0)->sync_with_stdio(0);
 
//     if(fopen("blank.inp", "r")){
//         freopen("blank.inp", "r", stdin);
//         freopen("blank.out", "w", stdout);
//     }
    
//     // cout << 1; return 0;

//     ll n = 1;

//     // cin >> n;

//     while(n) {
//         solve();
//         n --;
//         cout << "\n";
//     }
 
//     // cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
// }

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:23:20: error: cannot convert 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'char'
   23 |             ans.pb(ans);
      |                    ^~~
      |                    |
      |                    std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/10/string:55,
                 from /usr/include/c++/10/bits/locale_classes.h:40,
                 from /usr/include/c++/10/bits/ios_base.h:41,
                 from /usr/include/c++/10/ios:42,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from combo.cpp:1:
/usr/include/c++/10/bits/basic_string.h:1320:24: note:   initializing argument 1 of 'void std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::push_back(_CharT) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>]'
 1320 |       push_back(_CharT __c)
      |                 ~~~~~~~^~~
combo.cpp:29:17: error: 'std::string' {aka 'class std::__cxx11::basic_string<char>'} has no member named 'pp'
   29 |             ans.pp();
      |                 ^~
combo.cpp:22:19: warning: unused variable 'x' [-Wunused-variable]
   22 |         for(auto& x : temp){
      |                   ^