Submission #1228803

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Source Code Expand

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<math.h>


using namespace std;
#define out(s) cout<<(s)<<endl;
using ll = long long;

int main()
{
	string A, B, C;
	cin >> A >> B >> C;
	char next = 'a';
	while (true) {
		if (next == 'a') {
			if (A.size() == 0)break;
			next = A[0];
			A = A.substr(1);
		}
		else if (next == 'b') {
			if (B.size() == 0)break;
			next = B[0];
			B = B.substr(1);
		}
		else {
			if (C.size() == 0)break;
			next = C[0];
			C = C.substr(1);
		}
	}
	next = toupper(next);
	out(next);
	return 0;
}

Submission Info

Judge Result