제출 #1292459

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1292459		horka	Password (RMI18_password)	C++20	컴파일 에러	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>

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)
{
    string ans="";
    for(int i=0; i<s; i++)
    {
        string van="";
        van+=char('a'+i);
        if(query(van)==0) continue;
        int m=ans.size();
        for(int i=0; i<=m; i++)
        {
            string curr="";
            if(i>0) curr+=ans.substr(0,i);
            curr+=char('a'+i);
            if(i<m) curr+=ans.substr(i,m-i);
            if(query(curr)>m)
            {
                ans=curr;
                break;
            }
        }
    }
    return ans;
}

int main() {

  ifstream f("password.in");
  f >> n >> s >> password;
  f.close();
  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;
}

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/ccWs8ud5.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/ccvn1y84.o:password.cpp:(.text+0x100): first defined here
/usr/bin/ld: /tmp/ccWs8ud5.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccvn1y84.o:password.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status