Submission #1054430

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054430		matere	Password (RMI18_password)	C++14	Compilation error	0 ms	0 KiB

password

// Sample grader for contestants' use.
//
// Usage: place your input data in the file password.in in the format
//
// line 1: N S
// line 2: hidden_password
//
// Then compile this grader together with your implementation.
// Run the binary to see your guessing strategy at work!
// Set DEBUG to 1 to print all queries.
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
#include <stdlib.h>
#include <assert.h>
#include <bits/stdc++.h>

using namespace std;

#define DEBUG 0
#define MAX_QUERIES 50000
#define MAX_N 5000
#define MAX_SIGMA 26

static string password;
static int n, s, numQueries;
static stringstream msg;

static void end(int success) {
    cout << (success ? "SUCCESS! " : "ERROR: ") << msg.str() << endl;
    exit(0);
}

int query(string q) {
    if (++numQueries > MAX_QUERIES) {
        msg << "Could not guess the password with " << MAX_QUERIES << " questions.";
        end(0);
    }

    int len = q.size();

    // validation
    if (len < 1 || len > n) {
        msg << "Query '" << q << "' should have length between 1 and "
            << n << " characters.";
        end(0);
    }

    for (int i = 0; i < len; i++) {
        if (q[i] < 'a' || q[i] >= 'a' + s) {
        msg << "Illegal character '" << q[i] << "' found.";
        end(0);
        }
    }

    // while possible, advance one character in q and find its next
    // occurrence in password
    int i = 0, j = 0, plen = password.size();
    while (i < plen && j < len) {
        while ((i < plen) && (password[i] != q[j])) {
        i++;
        }
        if (i < plen) { /* found a match */
        i++;
        j++;
        }
    }

    if (DEBUG) {
        cout << "Question #" << numQueries << " [" << q << "] answer " << j << endl;
    }
    return j;
}

string guess(int n, int s){
    vector<pair<int,char> >amt;
    for(char i='a';i<='a'+s-1;i++){
        string q="";
        for(int j=1;j<=n;j++){
            q+=i;
        }
        amt.push_back({query(q),i});
    }
    sort(amt.begin(),amt.end());
    // for(pair<int,char>i:amt){
    //     cout<<i.first<<' '<<i.second<<endl;
    // }
    string ans="";
    for(int i=1;i<=n;i++) ans+=amt.back().second;
    set<pair<int,char> >rem;
    for(pair<int,char>i:amt) rem.insert(i);
    for(pair<int,char>i:amt){
        rem.erase(i);
        for(int num=i.first;num>=1;num--){
            string pr="";
            for(int k=1;k<=num;k++) pr+=i.second;
            int raod=0;
            for(pair<int,char> j:rem){
                string qu=pr;
                for(int k=1;k<=j.first;k++){
                    qu+=j.second;
                }
                raod+=query(qu)-num;
            }
            int cur=n-1;
            if(ans[cur]!=amt.back().second) raod++;
            while(raod){
                cur--;
                raod--;
                if(ans[cur]!=amt.back().second) raod++;
            }
            ans[cur]=i.second;
        }
    }
    return ans;
}

int main() {

    // ifstream f("password.in");
    // f >> n >> s >> password;
    // f.close();
    cin >> n >> s >> password;
    assert(n && s && !password.empty());

    string answer = guess(n, s);
    if (DEBUG) {
        cout << "Your answer: [" << answer << "]\n";
    }

    if (answer.compare(password)) {
        msg << "Your answer was [" << answer
            << "] which does not match the password [" << password << "].";
        end(0);
    } else {
        msg << "You guessed the password with " << numQueries << " queries.";
        end(1);
    }

	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccfYNYAb.o: in function `query(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x80): multiple definition of `query(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/ccMTBScc.o:password.cpp:(.text+0x920): first defined here
/usr/bin/ld: /tmp/ccfYNYAb.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccMTBScc.o:password.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status