제출 #1305871

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1305871		farica	콤보 (IOI18_combo)	C++20	컴파일 에러	0 ms	0 KiB

combo

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <string>

using namespace std;

namespace {

constexpr int MAX_N = 2000;
constexpr int MAX_NUM_MOVES = 8000;

int N;
std::string S;

int num_moves;

void wrong_answer(const char *MSG) {
  printf("Wrong Answer: %s\n", MSG);
  exit(0);
}

}  // namespace

int press(std::string p) {
  if (++num_moves > MAX_NUM_MOVES) {
    wrong_answer("too many moves");
  }
  int len = p.length();
  if (len > 4 * N) {
    wrong_answer("invalid press");
  }
  for (int i = 0; i < len; ++i) {
    if (p[i] != 'A' && p[i] != 'B' && p[i] != 'X' && p[i] != 'Y') {
      wrong_answer("invalid press");
    }
  }
  int coins = 0;
  for (int i = 0, j = 0; i < len; ++i) {
    if (j < N && S[j] == p[i]) {
      ++j;
    } else if (S[0] == p[i]) {
      j = 1;
    } else {
      j = 0;
    }
    coins = std::max(coins, j);
  }
  return coins;
}

#include <bits/stdc++.h>
typedef long long ll;

using namespace std;
using vi = vector<int>;
using pi = pair<int,int>;

string guess_sequence(int N) {
	string ans = "Y";
	int tmp = press("A");
	if(tmp) ans = "A";
	else if(press("B")) ans = "B";
	else if(press("X")) ans = "X";
	vector<char>c({'A', 'B', 'X', 'Y'});
	for(int i=0; i<4; ++i) {
		if(c[i] == ans[0]) {
			c.erase(c.begin()+i);
			break;
		}
	}
	if(N == 1) return ans;
	for(int i=1; i<N-1; ++i) {
		string nw = ans + c[0] + c[0] + ans + c[0] + c[1] + ans + c[0] + c[2] + ans + c[1];
		tmp = press(nw);
		int len = (int)ans.length();
		if(tmp == len+1) ans += c[1];
		else if(tmp == len+2) ans += c[0];
		else ans += c[2];
	}
	for(char ch: c) {
		string nw = ans+ch;
		if(press(nw) == N) {
			ans += ch;
			break;
		}
	}
	return ans;
}

int main() {
  char buffer[MAX_N + 1];
  if (scanf("%s", buffer) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  S = buffer;
  N = S.length();

  num_moves = 0;
  std::string answer = guess_sequence(N);
  if (answer != S) {
    wrong_answer("wrong guess");
    exit(0);
  }
  printf("Accepted: %d\n", num_moves);
  return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/ccmorJaq.o: in function `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x0): multiple definition of `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/ccxssSEP.o:combo.cpp:(.text+0x190): first defined here
/usr/bin/ld: /tmp/ccmorJaq.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccxssSEP.o:combo.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status