Submission #945707

#	Time	Username	Problem	Language	Result	Execution time	Memory
945707		jakebrain88	Snake (CEOI08_snake)	C++17	17.50 / 100	1 ms	500 KiB

snake

#include "snakelib.h"
#include<bits/stdc++.h>
using namespace std;
int k;
char a1, a2;
int main(){
	int l,r,minLen,maxLen,mid1,mid2;
    k= get_speed();
    minLen=1;maxLen=12122;
    l=0;r=12122;    
    for(int i=1;i<=30;++i){
		mid1 = l + (r-l)/3;
		mid2=r - (r-l)/3;
		ask_snake(mid1,mid2,&a1,&a2);
        if(a1=='f'){
        	if(a2=='f') maxLen=mid2-l,r=mid2+k-1;
        	if(a2=='s')minLen=mid2-mid1+2,maxLen=mid2-l,r=mid2+k;
        	if(a2=='b')minLen=mid2-mid1+3,r+=k;        	
		}
		if(a1=='s'){
			if(a2=='s'){
				tell_length(minLen=r-l+1);
				
				return 0;
			}
			l=mid1;
			if(a2=='f')maxLen=mid2-l,r=mid2+k-1;
			if(a2=='b')maxLen=r-mid1+1,r=mid2+k;
			
		}
		
		if(a1=='b'){
			l=mid1+1;
			if(a2=='f')maxLen=mid2-mid1-1,r=mid2+k-1;
        	if(a2=='s')maxLen=mid2-mid1,r=mid2+k;
        	if(a2=='b')minLen=r-mid1+1,r+=k;  
		}
    }
    int guess=(maxLen+minLen)/2;
    tell_length(guess);
    return 0;
}

• Subtask 1: 17.5 / 100