Submission #773125

#	Time	Username	Problem	Language	Result	Execution time	Memory
773125		aykhn	Password (RMI18_password)	C++14	Compilation error	0 ms	0 KiB

password

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

// author: aykhn

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;

#define TC int t; cin >> t; while (t--) _();
#define OPT ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#define ordered_setp tree<pii, null_type,less<pii>, rb_tree_tag,tree_order_statistics_node_update>
#define all(v) v.begin(), v.end()
#define pii pair<int, int>
#define mpr make_pair
#define eb emplace_back
#define new int32_t
#define pb push_back
#define ts to_string
#define int ll
#define fi first
#define se second
#define ins insert
#define inf 0x3F3F3F3F
#define infll 0x3F3F3F3F3F3F3F3FLL
#define bpc __builtin_popcount

int query(string str);

string guess(int n, int s)
{
    string ans = "";
    int prev;

    string x = "a";
    for (int i = 0; i < s; i++)
    {
        ans = x + ans;
        int X = query(ans);
        prev = max(X, prev);
        if (!X) ans = ans.substr(1, (int)(ans.length()) - 1);

        for (int j = 1; j <= ans.length(); j++)
        {
            string asd = ans.substr(0, j);
            string assd = ans.substr(j, (int)ans.length() - j);
            ans = asd;
            asd += x;
            asd += assd;
            int y = query(ans);
            if (y <= prev)
            {
                asd = ans.substr(0, j);
                assd = ans.substr(j + 1, (int)ans.length() - j - 1);
                ans = asd + assd;
            }
        }

        x[0]++;
    }

    return ans;
}

Compilation message (stderr)

password.cpp: In function 'std::string guess(ll, ll)':
password.cpp:46:27: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |         for (int j = 1; j <= ans.length(); j++)
      |                         ~~^~~~~~~~~~~~~~~
password.cpp:36:9: warning: 'prev' may be used uninitialized in this function [-Wmaybe-uninitialized]
   36 |     int prev;
      |         ^~~~
/usr/bin/ld: /tmp/ccsWPKNJ.o: in function `main':
grader.cpp:(.text.startup+0x66): undefined reference to `guess[abi:cxx11](int, int)'
collect2: error: ld returned 1 exit status