Submission #522123

#	Time	Username	Problem	Language	Result	Execution time	Memory
522123		new_acc	Combo (IOI18_combo)	C++14	100 / 100	35 ms	536 KiB

combo

#include<bits/stdc++.h>
#include "combo.h"
#define ll long long
#define fi first
#define se second
using namespace std;
const size_t N=2e3+10;
string s;
/*size_t press(string p){
	size_t res=0;
	for(size_t i=0;i<p.size();i++){
		size_t j=i;
		while(j-i<s.size()&&j<p.size()&&p[j]==s[j-i]) j++;
		res=max(res,j-i);
	}
	return res;
}*/
string guess_sequence(int n){
	string curr="";
	string k1,k2,k3;
	int xd=press("AB");
	if(xd>=1){
		xd=press("B");
		if(xd==1) curr+="B",k1="X",k2="Y",k3="A";
		else curr+="A",k1="X",k2="Y",k3="B";
	}else{
		xd=press("X");
		if(xd==1) curr+="X",k1="B",k2="Y",k3="A";
		else curr+="Y",k1="X",k2="B",k3="A";
	}
	size_t i;
	for(i=2;(int)i<=n-2;){
		size_t x=press(curr+k1+k2+k3+curr+k1+k1+k3+curr+k2+k1+k3);
		if(x==0+curr.size()){curr+=k3,i++;continue;}
		if(x==1+curr.size()){
			size_t x2=press(curr+k1+curr+k2+k2+k3+curr+k2+k3+k3+curr+k2+k2+k1);
			if(x2==curr.size()+1){curr+=k1+k3;i+=2;continue;}
			if(x2==curr.size()+2){
				size_t x3=press(curr+k2+k3+k1);
				if(x3==curr.size()+1) curr+=k2+k2+k2;
				else{
					if(x3==curr.size()+2) curr+=k2+k3+k2;
					else curr+=k2+k3+k1;
				}
				i+=3;
				continue;
			}
			size_t x3=press(curr+k2+k2+k3);
			if(x3==curr.size()+1) curr+=k2+k3+k3;
			else{
				if(x3==curr.size()+2) curr+=k2+k2+k1;
				else curr+=k2+k2+k3;
			}
			i+=3;
			continue;
		}
		if(x==2+curr.size()){
			size_t x2=press(curr+k2+k1+curr+k1+k2+k1+curr+k1+k2+k2);
			if(x2==curr.size()+1){
				size_t x3=press(curr+k1+k1+k1);
				if(x3==curr.size()+2) curr+=k1+k1+k2;
				else curr+=k1+k1+k1;
				i+=3;
				continue;
			}
			if(x2==curr.size()+2){
				size_t x3=press(curr+k2+k1+k1);
				if(x3==curr.size()+2) curr+=k2+k1+k2;
				else curr+=k2+k1+k1;
			}else{
				size_t x3=press(curr+k1+k2+k1);
				if(x3==curr.size()+2) curr+=k1+k2+k2;
				else curr+=k1+k2+k1;
			}
			i+=3;
			continue;
		}else{
			size_t x2=press(curr+k1+k2+k3);
			if(x2==curr.size()+3){curr+=k1+k2+k3;i+=3;continue;}
			x2=press(curr+k1+k1+k3);
			if(x2==curr.size()+3) curr+=k1+k1+k3;
			else curr+=k2+k1+k3;
			i+=3;
			continue;
		}
	}
	if((int)curr.size()==n-2){
		size_t x=press(curr+k1+k2+curr+k2+k2);
		if(x==curr.size()) curr+=k3;
		else{
			if(x==curr.size()+2){
				size_t x2=press(curr+k1+k2);
				if(x2==curr.size()+2) curr+=k1+k2;
				else curr+=k2+k2;
			}else{
				size_t x2=press(curr+k1+k1+curr+k2+k1);
				if(x2==curr.size()+2){
					size_t x3=press(curr+k1+k1);
					if(x3==curr.size()+2) curr+=k1+k1;
					else curr+=k2+k1;
				}else{
					size_t x3=press(curr+k1);
					if(x3==curr.size()+1) curr+=k1+k3;
					else curr+=k2+k3;
				}
			}
		}
	}
	if((int)curr.size()==n-1){
		size_t x=press(curr+k1);
		if(x==curr.size()+1) curr+=k1;
		else{
			x=press(curr+k2);
			if(x==curr.size()+1) curr+=k2;
			else curr+=k3;
		}
	}
	return curr;
}
/*int main(){
	cin>>s;
	cout<<guess_sequence(s.size())<<"\n";
	return 0;
}*/

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95