Submission #130782

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
130782	2019-07-16T05:15:22 Z	김세빈(#3168)	Snake (CEOI08_snake)	C++14	25 / 100	2 ms	380 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();
	
	if(k == 0) k = 1, d = 0;
	else d = 1;
	
	if(k > 1) return 0;
	
	s1 = 0; e1 = 12121 / k;
	s2 = 0; e2 = 12121 / k;
	
	for(i=0; i<13; i++){
		e1 = min(12121 / k, e1 + d);
		e2 = min(12121 / k, e2 + d);
		
		if(s1 == s2 && e1 == e2 && e1 - s1 >= 3){
			m1 = (s1 * 2 + e1) / 3;
			m2 = (s1 + e1 * 2) / 3;
			
			ask_snake(m1 * k, m2 * k, &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 >> 1;
			m2 = s2 + e2 >> 1;
			
			ask_snake(m1 * k, m2 * k, &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 - e1 - 1) * k);
}

Compilation message

snake.cpp: In function 'int main()':
snake.cpp:46:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    m1 = s1 + e1 >> 1;
         ~~~^~~~
snake.cpp:47:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    m2 = s2 + e2 >> 1;
         ~~~^~~~

Subtask #1

25.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
2	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
3	Incorrect	2 ms	376 KB	Unexpected end of file - token expected
4	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
5	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
6	Correct	2 ms	380 KB	Output is correct: estimate ok. 13 calls needed
7	Incorrect	2 ms	248 KB	your estimate differs too much (2 units)
8	Incorrect	2 ms	376 KB	Unexpected end of file - token expected
9	Incorrect	2 ms	376 KB	Unexpected end of file - token expected
10	Incorrect	2 ms	376 KB	Unexpected end of file - token expected
11	Incorrect	2 ms	376 KB	Unexpected end of file - token expected
12	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
13	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
14	Correct	2 ms	376 KB	Output is correct: estimate ok. 13 calls needed
15	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
16	Correct	2 ms	248 KB	Output is correct: estimate ok. 13 calls needed
17	Incorrect	2 ms	248 KB	your estimate differs too much (2 units)
18	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
19	Incorrect	2 ms	248 KB	Unexpected end of file - token expected
20	Incorrect	2 ms	376 KB	Unexpected end of file - token expected