#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
using namespace std;
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<pl> vpl;
typedef vector<ld> vld;
typedef pair<ld, ld> pld;
typedef vector<pi> vpi;
//typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
template<typename T>
ostream &operator<<(ostream &os, vector<T> &a) {
os << "[";
for (int i = 0; i < ll(a.size()); i++) { os << a[i] << ((i != ll(a.size() - 1) ? " " : "")); }
os << "]\n";
return os;
}
#define all(x) x.begin(),x.end()
#define YES out("YES")
#define NO out("NO")
#define out(x){cout << x << "\n"; return;}
#define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL);cout.tie(NULL)
#define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";}
#define pb push_back
#define umap unordered_map
template<typename T1, typename T2>
istream &operator>>(istream &is, pair<T1, T2> &p) {
is >> p.first >> p.second;
return is;
}
template<typename T1, typename T2>
ostream &operator<<(ostream &os, pair<T1, T2> &p) {
os << "" << p.first << " " << p.second << "";
return os;
}
void usaco(string taskname) {
string fin = taskname + ".in";
string fout = taskname + ".out";
const char *FIN = fin.c_str();
const char *FOUT = fout.c_str();
freopen(FIN, "r", stdin);
freopen(FOUT, "w", stdout);
}
template<typename T>
void read(vector<T> &v) {
int n = v.size();
for (int i = 0; i < n; i++)
cin >> v[i];
}
template<typename T>
vector<T> UNQ(vector<T> a) {
vector<T> ans;
for (T t: a)
if (ans.empty() || t != ans.back())
ans.push_back(t);
return ans;
}
ll ceil(ll a, ll b) {
ll ans = a / b;
if (a % b)ans++;
return ans;
}
ld log(ld a, ld b) { return log(b) / log(a); }
ll power(ll base, ll exp, ll M = 1e18) {//(base^exp)%M
ll ans = 1;
while (exp) {
if (exp % 2 == 1)ans = ((ans % M) * (base % M)) % M;
base = ((base % M) * (base % M)) % M;
exp /= 2;
}
return ans;
}
string to_base(int n, int new_base) {
string s;
int nn = n;
while (nn) {
s += to_string(nn % new_base);
nn /= new_base;
}
reverse(all(s));
return s;
}
ll gcd(ll a, ll b) {
if (a < b)swap(a, b);
if (b == 0)return a;
return gcd(b, a % b);
}
ll lcm(ll a, ll b) {
ll x = (a / gcd(a, b));
return b * x;
}
vl generate_array(ll n, ll mn = 1, ll mx = 1e18 + 1) {
if (mx == 1e18 + 1)
mx = n;
vl ans(n);
for (int i = 0; i < n; i++)
ans[i] = (mn + rand() % (mx - mn + 1));
return ans;
}
string substr(string s, int l, int r) {
string ans;
for (int i = l; i <= r; i++)
ans += s[i];
return ans;
}
int query(string);
int next_diff(string& s,int ix){
if(ix+1<s.size() && s[ix+1]!=s[ix])
return ix;
for(int i=ix+1; i<s.size(); i++)
if(s[i]!=s[ix])
return i;
return s.size();
}
void _insert(char c,string& ans){
int l=-1,r=ans.size()-1,pos=-1;
while(l<=r){
int m=(l+r)/2;
if(m==ans.size()-1){
if(query(ans+string(1,c))==ans.size()+1)
pos=ans.size()-1;
break;
}
string cur=ans.substr(0,m+1)+string(1,c)+ans.substr(m+1,ans.size()-(m+1));
string nxt=ans.substr(0,m+2)+string(1,c)+ans.substr(m+2,ans.size()-(m+2));
if(query(cur)>next_diff(cur,m+1))
pos=m,l=m+1;
else
r=m-1;
}
ans=ans.substr(0,pos+1)+string(1,c)+ans.substr(pos+1,ans.size()-(pos+1));
}
string guess(int n,int AB){
vi cnt(26);
int sum=0;
for(int i=0; i<AB; i++){
int l=1,r=n-sum,ans=0;
while(l<=r){
int m=(l+r)/2;
if(query(string(m,('a'+i)))==m)
ans=m,l=m+1;
else
r=m-1;
}
cnt[i]=ans;
sum+=ans;
}
string ans;
int mx=0;
for(int i=0; i<26; i++)
if(cnt[i]>ans.size())
ans=string(cnt[i],i+'a'),mx=i;
for(int i=0; i<26; i++){
if(mx==i)
continue;
for(int j=0; j<cnt[i]; j++)
_insert(i+'a',ans);
}
return ans;
}
/*
10 10
aababcacbd
*/
Compilation message
password.cpp: In function 'int next_diff(std::string&, int)':
password.cpp:136:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
136 | if(ix+1<s.size() && s[ix+1]!=s[ix])
| ~~~~^~~~~~~~~
password.cpp:138:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
138 | for(int i=ix+1; i<s.size(); i++)
| ~^~~~~~~~~
password.cpp: In function 'void _insert(char, std::string&)':
password.cpp:150:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
150 | if(m==ans.size()-1){
| ~^~~~~~~~~~~~~~
password.cpp:151:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
151 | if(query(ans+string(1,c))==ans.size()+1)
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
password.cpp: In function 'std::string guess(int, int)':
password.cpp:185:18: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
185 | if(cnt[i]>ans.size())
password.cpp: In function 'void usaco(std::string)':
password.cpp:57:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
57 | freopen(FIN, "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~
password.cpp:58:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
58 | freopen(FOUT, "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
200 KB |
Execution killed with signal 13 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
200 KB |
Returned early from guess() after 145 queries. |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
86 ms |
424 KB |
Returned early from guess() after 7212 queries. |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
200 KB |
Execution killed with signal 13 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
200 KB |
Execution killed with signal 13 |
| 2 |
Halted |
0 ms |
0 KB |
- |
