Submission #901797

#	Time	Username	Problem	Language	Result	Execution time	Memory
901797		omsincoconut	Password (RMI18_password)	C++17	10 / 100	343 ms	944 KiB

password

#include <bits/stdc++.h>

using namespace std;

int query(string str);

inline void pushstr(string &q, string &s, int l, int r) {
    for (int i = l; i <= r; i++) q.push_back(s[i]);
}

inline void pushstr(string &q, char c, int n) {
    for (int i = 0; i < n; i++) q.push_back(c);
}

string guess(int n, int s) {
    string ret;
    int ct[s];
    for (char c = 'a'; c < 'a'+s; c++) {
        string q;
        pushstr(q, c, n);
        ct[c-'a'] = query(q);
    }
    for (char c = 'a'; c < 'a'+s; c++) {
        for (int i = 0; i <= ret.size(); i++) {
            int l = 0, r = ct[c-'a']+1;
            while (r-l > 1) {
                int mid = (l+r)/2;
                string q;
                pushstr(q, ret, 0, i-1);
                pushstr(q, c, mid);
                pushstr(q, ret, i, ret.size()-1);
                if (query(q) == q.size()) l = mid;
                else r = mid;
            }
            string nret;
            pushstr(nret, ret, 0, i-1);
            pushstr(nret, c, l);
            pushstr(nret, ret, i, ret.size()-1);
            ret = nret;
            ct[c-'a'] -= l;
        }
    }
    return ret;
};

Compilation message (stderr)

password.cpp: In function 'std::string guess(int, int)':
password.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for (int i = 0; i <= ret.size(); i++) {
      |                         ~~^~~~~~~~~~~~~
password.cpp:32:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                 if (query(q) == q.size()) l = mid;
      |                     ~~~~~~~~~^~~~~~~~~~~

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