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B. Last Year's Substring.cpp
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B. Last Year's Substring.cpp
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#include<bits/stdc++.h>
int main()
{
int test;
std::cin>>test;
while(test--)
{
int num;
std::cin>>num;
std::string str;
while(num--)
{
char ch;
std::cin>>ch;
str.push_back(ch);
}
if(str.size()>=4)
{
if(str[0]=='2' && str[1]=='0' && str[str.size()-2]=='2' && str[str.size()-1]=='0')
{
std::cout<<"YES\n";
}
else if(str[0]=='2' && str[1]=='0' && str[2]=='2' && str[str.size()-1]=='0')
{
std::cout<<"YES\n";
}
else if(str[0]=='2' && str[1]=='0' && str[2]=='2' && str[3]=='0')
{
std::cout<<"YES\n";
}
else if(str[0]=='2' && str[str.size()-3]=='0' && str[str.size()-2]=='2' && str[str.size()-1]=='0')
{
std::cout<<"YES\n";
}
else if(str[str.size()-4]=='2' && str[str.size()-3]=='0' && str[str.size()-2]=='2' && str[str.size()-1]=='0')
{
std::cout<<"YES\n";
}
else
{
std::cout<<"NO\n";
}
}
else
{
std::cout<<"NO\n";
}
}
}