Submission #854152

#	Time	Username	Problem	Language	Result	Execution time	Memory
854152		TimDee	Password (RMI18_password)	C++17	30 / 100	50 ms	1224 KiB

password

//  Esti <3

//\
     šťastia pre nás :)
//   you're already the best
//             _
//   ^ ^      //
// >(O_O)<___//
//   \ __ __  \
//    \\ \\ \\\\
 
#include <bits/stdc++.h>
using namespace std;
 
//#pragma GCC optimize("O3","unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
 
#pragma GCC optimize("O3")
#pragma GCC target("popcnt")

using ll = long long;
//#define int long long
#define forn(i,n) for(int i=0; i<(n); ++i)
#define pb push_back
#define pi pair<int,int>
#define f first
#define s second 
#define vii(a,n) vector<int> a(n); forn(i,n) cin>>a[i];
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
 
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
const int inf = 1e18;
const int mod = 998244353;
 
// \
\
:smiling_face_with_3_hearts: :smiling_face_with_3_hearts:  :smiling_face_with_3_hearts:  
 
//vidime sa veľmi skoro, moje slnko

string pass;

int query(string s);

int Q=0;
void insert(string&s, int i, char c) {
    s+=c;
    for (int j=s.size()-1; j>i; --j) {
        swap(s[j],s[j-1]);
    }
}
void erase(string&s, int i) {
    for (int j=i; j+1 < s.size(); ++j) swap(s[j], s[j+1]);
    s.pop_back();
}

string merge(string f, string s) {
    int p=f.size();
    int n=s.size()-1;
    int old = query(f);
    while (n>=0 && p>=0) {
        insert(f,p,s[n]);
        int x = query(f);
        if (x > old) {
            old = x;
            --n;
        } else {
            erase(f,p);
            --p;
        }
    }
    while (n>=0) insert(f,0,s[n--]);
    return f;
}

string guess(int n, int s) {

    vector<int> cnt(s,0);
    for(char c='a'; c<(char)('a'+s); ++c) {
        string str;
        forn(i,n) str+=c;
        int x = query(str);
        cnt[c-'a']=x;
    }
    vector<pi> v;
    forn(i,s) if (cnt[i]) v.pb({cnt[i],i});
    sort(all(v));
    
    vector<string> a;
    for(auto&x:v) a.pb(string(x.f,(char)('a'+x.s)));

    while (a.size()>1) {
        vector<string> b;
        int n=a.size();
        for(int i=0; i+1<n; i+=2) {
            //cout<<a[i]<<" & "<<a[i+1]<<": ";
            auto z = merge(a[i],a[i+1]);
            //cout<<z<<'\n';
            b.pb(z);
        }
        if (n&1) b.pb(a[n-1]);
        a=b;
    }
    return a[0];

}

Compilation message (stderr)

password.cpp:3:1: warning: multi-line comment [-Wcomment]
    3 | //\
      | ^
password.cpp:9:1: warning: multi-line comment [-Wcomment]
    9 | //   \ __ __  \
      | ^
password.cpp:36:1: warning: multi-line comment [-Wcomment]
   36 | // \
      | ^
password.cpp:33:17: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   33 | const int inf = 1e18;
      |                 ^~~~
password.cpp: In function 'void erase(std::string&, int)':
password.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     for (int j=i; j+1 < s.size(); ++j) swap(s[j], s[j+1]);
      |                   ~~~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20