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#include<bits/stdc++.h> 
using namespace std;
 
int main() {
	int t;
	cin >> t;
    cin.ignore(numeric_limits<streamsize>::max(), '\n');
	while(t--) {
		string s1, s2;
		getline(cin, s1);
		getline(cin, s2);
		int s1_sz = s1.size();
		int s2_sz = s2.size();
 
		if(s1_sz != s2_sz) {
			cout << "NO\n";
			continue;
		}
 
		if(!s1.compare(s2)) {
			cout << "YES\n";
			continue;
		}
 
		if(s1_sz % 2 != 0) {
			cout << "NO\n";
			continue;
		}
 
		int mid = s1_sz / 2;
 
		if(!s1.substr(0, mid).compare(s2.substr(mid, s2_sz)) && !s2.substr(0, mid).compare(s1.substr(mid, s1_sz))) {
			cout << "YES\n";
		}
		else {
			cout << "NO\n";
		}
	}	
}

Runtime error #stdin #stdout 0s 4176KB

stdin

copy

Standard input is empty

stdout

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https://ideone.com/ETY1Os

language:

C++ (gcc 8.3)

created:

visibility:

public

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