Submission #1688604

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Source Code Expand

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<string>
#include<cmath>
#include<vector>
#include<functional>
#include<stack>
#include<utility>
#include<map>

using namespace std;

int main() {
	int an = 0, bn = 0, cn = 0;
	char cur = 'a';
	string A, B, C;
	cin >> A >> B >> C;
	while (1) {
		switch (cur){
		case 'a':
			if (an == A.length()) {
				cout << "A" << endl;
				return 0;
			}
			cur = A[an];
			an++;
			break;
		case 'b':
			if (bn == B.length()) { 
				cout << "B" << endl; 
				return 0;
			}
			cur = B[bn];
			bn++;
			break;
		case 'c':
			if (cn == C.length()) {
				cout << "C" << endl;
				return 0;
			}
			cur = C[cn];
			cn++;
			break;
		}
	}
	return 0;
}

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