Submission #496350

#	Time	Username	Problem	Language	Result	Execution time	Memory
496350		triplem5ds	Password (RMI18_password)	C++14	100 / 100	258 ms	684 KiB

password

/// Zengy MANGA
#pragma GCC optimize("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("avx,avx2,fma")

#include "bits/stdc++.h"

using namespace std;

#define pb push_back
#define F first
#define S second
#define f(i, a, b)  for(int i = a; i < b; i++)
#define all(a)  a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define sz(x) (int)(x).size()
#define mp(x,y) make_pair(x,y)
#define popCnt(x) (__builtin_popcountll(x))

using ll = long long;
using ii = pair<int,int>;
using ull = unsigned long long;
using db = long double;

const int N = 2e5+5, LG = 18, MOD = 998244353;
const long double PI = acos(-1);

int query(string s);

using is = pair<int, string>;

priority_queue<is, vector<is>, greater<is>> pq;

string mrg(string s1, string s2) {
    swap(s2,s1);
    for(int i = s1.size(); i > 0 && s2.size(); --i) {
        for(int j = 1; j <= s2.size() + 1; j++) {
            if(j > s2.size()) {
                s1 = s1.substr(0,i) + s2 + s1.substr(i);
                s2 = "";
                break;
            }
            if(query(s1.substr(0,i) + s2.substr(s2.size()-j) + s1.substr(i)) != s1.size() + j) {
                s1 = s1.substr(0,i) + s2.substr(s2.size()-(j-1)) + s1.substr(i);
                f(k,0,j-1)s2.pop_back();
                break;
            }
        }
    }
    return s2+s1;
}

string guess(int n, int s) {

    f(i,0,s) {
        string str = string(query(string(n, 'a' + i)), 'a' + i);
        if(str.size())
        pq.push(make_pair(str.size(), str));
    }

    while(sz(pq) > 1) {

        auto cur1 = pq.top().second; pq.pop();
        auto cur2 = pq.top().second; pq.pop();

        string ans = mrg(cur1, cur2);

        pq.push(mp(sz(ans), ans));
    }

    return pq.top().second;
}

Compilation message (stderr)

password.cpp: In function 'std::string mrg(std::string, std::string)':
password.cpp:37:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         for(int j = 1; j <= s2.size() + 1; j++) {
      |                        ~~^~~~~~~~~~~~~~~~
password.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |             if(j > s2.size()) {
      |                ~~^~~~~~~~~~~
password.cpp:43:78: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |             if(query(s1.substr(0,i) + s2.substr(s2.size()-j) + s1.substr(i)) != s1.size() + j) {
      |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~

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