#include<bits/stdc++.h>
using namespace std;
const int N = 5010;
int cnt[N];
char a[N], b[N];
int query(string q)
string guess(int n, int s) {
vector<pair<int, char> > lst;
for(int j = 0; j < s; j++) {
char c = j + 'a';
string ask;
for(int i = 1; i <= n; i++) ask.push_back(c);
lst.emplace_back(query(ask), c);
}
sort(lst.begin(), lst.end());
int m; char c;
tie(m, c) = lst[0];
for(int i = 1; i <= m; i++) a[i] = c;
lst.erase(lst.begin());
for(auto &it : lst) {
int num; char c;
tie(num, c) = it;
for(int i = 0; i <= m; i++) {
string ask;
for(int j = 1; j <= i; j++) ask.push_back(a[j]);
cnt[i] = 0;
while (num > 0) {
ask.push_back(c);
string tmp;
for(int j = i + 1; j <= m; j++) tmp.push_back(a[j]);
if (query(ask + tmp) > m + cnt[i]) cnt[i]++, num--;
else break;
}
}
int m2 = 0;
for(int i = 0; i <= m; i++) {
if (i) b[++m2] = a[i];
while (cnt[i]--) b[++m2] = c;
}
for(int i = 1; i <= m2; i++) a[i] = b[i];
m = m2;
}
string ret;
for(int i = 1; i <= m; i++) ret.push_back(a[i]);
return ret;
}
Compilation message
password.cpp:9:1: error: expected initializer before 'string'
9 | string guess(int n, int s) {
| ^~~~~~
