Language: Java

import java.util.*;
public class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int M = sc.nextInt();
		long K = sc.nextLong();
		long time = 0;
		int[] A = new int[N];
		int[] B = new int[M];
		int count = 0;
		int countA = 0;
		int countB = 0;
		for(int i = 0;i < N;i++){
			A[i] = sc.nextInt();
		}
		for(int i = 0;i < M;i++){
			B[i] = sc.nextInt();
		}
		while(time < K){
			if(countA < N && countB < M){
				if(A[countA] < B[countB]){
					time += A[countA];
					countA++;
				}else if(A[countA] > B[countB]){
					time += B[countB];
					countB++;
				}else{
					subcountA = countA;
					subcountB = countB;
					boolean flg = true; 
					while(flg){
						if(subcountA < N && subcountB < M){
							if(A[subcountA + 1] < B[subcountB + 1]){
								time += A[countA];
								countA++;
								flg = false;
							}else if(A[subcountA + 1] > B[subcountB + 1]){
								time += B[countB];
								countB++;
								flg = false;
							}else{
								subcountA++;
								subcountB++;
							}
						}else if(subcountA == N){
							if(A[subcountA] < B[subcountB + 1]){
								time += A[countA];
								countA++;
								flg = false;
							}else if(A[subcountA] > B[subcountB + 1]){
								time += B[countB];
								countB++;
								flg = false;
							}else{
								subcountB++;
							}
						}else if(subcountB == M){
							if(A[subcountA + 1] < B[subcountB]){
								time += A[countA];
								countA++;
								flg = false;
							}else if(A[subcountA + 1] > B[subcountB]){
								time += B[countB];
								countB++;
								flg = false;
							}else{
								subcountA++;
							}
						}
					}
				}
			}else if(countA == N && countB == M){
				break;
			}else if(countA == N){
				time += B[countB];
				countB++;
			}else{
				time += A[countA];
				countA++;
			}
			count++;
		}
		if(time > K){
			count--;
		}
		System.out.println(count);
	}
}

Compiler output:
Main.java:29: error: cannot find symbol
					subcountA = countA;
					^
  symbol:   variable subcountA
  location: class Main
Main.java:30: error: cannot find symbol
					subcountB = countB;
					^
  symbol:   variable subcountB
  location: class Main
Main.java:33: error: cannot find symbol
						if(subcountA < N && subcountB < M){
						   ^
  symbol:   variable subcountA
  location: class Main
Main.java:33: error: cannot find symbol
						if(subcountA < N && subcountB < M){
						                    ^
  symbol:   variable subcountB
  location: class Main
Main.java:34: error: cannot find symbol
							if(A[subcountA + 1] < B[subcountB + 1]){
							     ^
  symbol:   variable subcountA
  location: class Main
Main.java:34: error: cannot find symbol
							if(A[subcountA + 1] < B[subcountB + 1]){
							                        ^
  symbol:   variable subcountB
  location: class Main
Main.java:38: error: cannot find symbol
							}else if(A[subcountA + 1] > B[subcountB + 1]){
							           ^
  symbol:   variable subcountA
  location: class Main
Main.java:38: error: cannot find symbol
							}else if(A[subcountA + 1] > B[subcountB + 1]){
							                              ^
  symbol:   variable subcountB
  location: class Main
Main.java:43: error: cannot find symbol
								subcountA++;
								^
  symbol:   variable subcountA
  location: class Main
Main.java:44: error: cannot find symbol
								subcountB++;
								^
  symbol:   variable subcountB
  location: class Main
Main.java:46: error: cannot find symbol
						}else if(subcountA == N){
						         ^
  symbol:   variable subcountA
  location: class Main
Main.java:47: error: cannot find symbol
							if(A[subcountA] < B[subcountB + 1]){
							     ^
  symbol:   variable subcountA
  location: class Main
Main.java:47: error: cannot find symbol
							if(A[subcountA] < B[subcountB + 1]){
							                    ^
  symbol:   variable subcountB
  location: class Main
Main.java:51: error: cannot find symbol
							}else if(A[subcountA] > B[subcountB + 1]){
							           ^
  symbol:   variable subcountA
  location: class Main
Main.java:51: error: cannot find symbol
							}else if(A[subcountA] > B[subcountB + 1]){
							                          ^
  symbol:   variable subcountB
  location: class Main
Main.java:56: error: cannot find symbol
								subcountB++;
								^
  symbol:   variable subcountB
  location: class Main
Main.java:58: error: cannot find symbol
						}else if(subcountB == M){
						         ^
  symbol:   variable subcountB
  location: class Main
Main.java:59: error: cannot find symbol
							if(A[subcountA + 1] < B[subcountB]){
							     ^
  symbol:   variable subcountA
  location: class Main
Main.java:59: error: cannot find symbol
							if(A[subcountA + 1] < B[subcountB]){
							                        ^
  symbol:   variable subcountB
  location: class Main
Main.java:63: error: cannot find symbol
							}else if(A[subcountA + 1] > B[subcountB]){
							           ^
  symbol:   variable subcountA
  location: class Main
Main.java:63: error: cannot find symbol
							}else if(A[subcountA + 1] > B[subcountB]){
							                              ^
  symbol:   variable subcountB
  location: class Main
Main.java:68: error: cannot find symbol
								subcountA++;
								^
  symbol:   variable subcountA
  location: class Main
22 errors