#include<bits/stdc++.h>
using namespace std;
#define fori(i, a, b) for(int i = (int) (a); i <= (int) (b); i++)
#define ford(i, a, b) for(int i = (int) (a); i >= (int) (b); i--)
#define fi first
#define se second
#define all(x) begin(x), end(x)
#define ii pair<int, int>
#define pb push_back
#define pf push_front
#define em emplace
#define ef emplace_front
#define eb emplace_back
#define om pop
#define of pop_front
#define ob pop_back
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
#define rand rng
#define endl '\n'
#define sp ' '
#define int long long
const int maxn = 1e5 + 5, inf = LLONG_MAX / 100ll;
int cnt[26];
int query(string str);
string handle(int l, int r) {
if(l == r) {
string re;
char c = char(l + 'a');
fori(i, 1, cnt[l]) re.push_back(c);
//cout << re << endl;
return re;
}
else {
int m = l + r >> 1;
string L = handle(l, m);
string R = handle(m + 1, r);
int q_num = 0, len = L.size() + R.size();
int ptr = 0;
for(char C: R) {
while(1) {
if(ptr == L.size()) {
L.insert(ptr, 1, C);
ptr++;
break;
}
string tempL = L; tempL.insert(ptr, 1, C);
++q_num; assert(q_num <= len);
if(query(tempL) == tempL.size()) {
L = tempL; ptr++;
break;
}
else {
ptr++;
}
}
}
//cout << L << endl;
return L;
}
}
string guess(int n, int s) {
fori(i, 0, s - 1) {
char c = char(i + 'a');
string q;
fori(j, 1, n) q.push_back(c);
cnt[i] = query(q);
}
return handle(0, s - 1);
}
Compilation message
password.cpp: In function 'std::string handle(long long int, long long int)':
password.cpp:35:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
35 | int m = l + r >> 1;
| ~~^~~
password.cpp:42:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
42 | if(ptr == L.size()) {
| ~~~~^~~~~~~~~~~
password.cpp:49:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
49 | if(query(tempL) == tempL.size()) {
| ~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccdQCXdF.o: in function `main':
grader.cpp:(.text.startup+0x66): undefined reference to `guess[abi:cxx11](int, int)'
collect2: error: ld returned 1 exit status
