Submission #130991

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
130991	2019-07-16T11:05:29 Z	sebinkim	Snake (CEOI08_snake)	C++14	85 / 100	5 ms	384 KB

snake

#include <bits/stdc++.h>

#include "snakelib.h"

using namespace std;

int main()
{
	int i, k, d, s1, s2, e1, e2, m1, m2;
	char a1, a2;
	
	k = get_speed();
	
	s1 = 0; e1 = 12121;
	s2 = 0; e2 = 12121;
	
	for(i=0; i<13; i++){
		e1 = min(12121, e1 + k);
		e2 = min(12121, e2 + k);
		
		if(max(s1, s2) <= min(e1, e2)){
			s1 = s2 = min(s1, s2);
			e1 = e2 = max(e1, e2);
			m1 = (s1 * 2 + e1) / 3;
			m2 = (s1 + e1 * 2) / 3;
			
			ask_snake(m1, m2, &a1, &a2);
			
			if(a1 == 'b' && a2 == 'f'){
				s1 = s2 = m1 + 1;
				e1 = e2 = m2 - 1;
			}
			else if(a1 == 'f') e1 = e2 = m1 - 1;
			else if(a2 == 'b') s1 = s2 = m2 + 1;
			else{
				if(a1 == 's') e1 = m1;
				else s1 = m1 + 1, e1 = m2;
				if(a2 == 's') s2 = m2;
				else s2 = m1, e2 = m2 - 1;
			}
		}
		else{
			m1 = (s1 + e1) / 2;
			m2 = (s2 + e2) / 2;
			
			ask_snake(m1, m2, &a1, &a2);
			
			if(a1 == 'b') s1 = m1 + 1;
			else e1 = m1 - 1;
			
			if(a2 == 'f') e2 = m2 - 1;
			else s2 = m2 + 1;
		}
	}
	
	tell_length(s2 + e2 - s1 - e1 >> 1);
}

Compilation message

snake.cpp: In function 'int main()':
snake.cpp:56:27: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
  tell_length(s2 + e2 - s1 - e1 >> 1);
              ~~~~~~~~~~~~~^~~~
snake.cpp:9:12: warning: unused variable 'd' [-Wunused-variable]
  int i, k, d, s1, s2, e1, e2, m1, m2;
            ^

Subtask #1

85.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
2	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
3	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
4	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
5	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
6	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
7	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
8	Incorrect	1 ms	248 KB	your estimate differs too much (3 units)
9	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
10	Incorrect	2 ms	256 KB	your estimate differs too much (5 units)
11	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
12	Incorrect	5 ms	384 KB	your estimate differs too much (1 units)
13	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
14	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
15	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
16	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
17	Correct	3 ms	248 KB	Output is correct: estimate ok. 13 calls needed
18	Correct	2 ms	300 KB	Output is correct: estimate ok. 13 calls needed
19	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
20	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed