Submission #685298

#	Time	Username	Problem	Language	Result	Execution time	Memory
685298		grossly_overconfident	Counting Mushrooms (IOI20_mushrooms)	C++17	Compilation error	0 ms	0 KiB

mushrooms

#include "mushrooms.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> decipher(int a, int b, int c) {
	vector<int> m = { a, 0, b, c };
	int c1 = use_machine(m);
	if (c1 == 0) {
		m = { 0, 0, 0 };
		return m;
	}
	if (c1 == 3) {
		m = { 1, 1, 0 };
		return m;
	}
	if (c1 == 2) {
		m = { b, a, 0, c };
		c1 = use_machine(m);
		if (c1 == 1) {
			m = { 0, 1, 0 };
		}
		else if (c1 == 3) {
			m = { 1, 0, 1 };
		}
		else if (c1 == 2) {
			m = { 1, 1, 1 };
		}
		return m;
	}
	m = { b, 0, c };
	c1 = use_machine(m);
	if (c1 == 0) {
		m = { 1, 0, 0 };
	}
	else if (c1 == 1) {
		m = { 0, 0, 1 };
	}
	else if (c1 == 2) {
		m = { 0, 1, 1 };
	}
	return m;
}

int count_mushrooms(int n) {
	int count = 0;
	int i = 0;
	while (i + 2 <= n - 1) {
		vector<int> take = decipher(i, i + 1, i + 2);
		if (take[0] == 0) {
			++count;
		}
		if (take[1] == 0) {
			++count;
		}
		if (take[2] == 0) {
			++count;
		}
		i += 3;
	}
	if ((n - 1) % 3 == 1) {
		if (use_machine({ n - 1, 0 }) == 0) {
			++count;
		}
	}
	if ((n - 1) % 3 == 2) {
		int take2 = use_machine({ n - 1, 0, n - 2 })
		if (take2 == 0) {
			count += 2;
		}
		else if (take2 == 1) {
			++count;
		}
	}
	return count;
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:67:3: error: expected ',' or ';' before 'if'
   67 |   if (take2 == 0) {
      |   ^~
mushrooms.cpp:66:7: warning: unused variable 'take2' [-Wunused-variable]
   66 |   int take2 = use_machine({ n - 1, 0, n - 2 })
      |       ^~~~~
mushrooms.cpp:70:3: error: expected '}' before 'else'
   70 |   else if (take2 == 1) {
      |   ^~~~
mushrooms.cpp:65:24: note: to match this '{'
   65 |  if ((n - 1) % 3 == 2) {
      |                        ^
mushrooms.cpp:70:12: error: 'take2' was not declared in this scope
   70 |   else if (take2 == 1) {
      |            ^~~~~
mushrooms.cpp:73:2: warning: no return statement in function returning non-void [-Wreturn-type]
   73 |  }
      |  ^
mushrooms.cpp: At global scope:
mushrooms.cpp:74:2: error: expected unqualified-id before 'return'
   74 |  return count;
      |  ^~~~~~
mushrooms.cpp:75:1: error: expected declaration before '}' token
   75 | }
      | ^