백준 - 25304번 영수증

코드

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int total = Integer.parseInt(br.readLine());

        int n = Integer.parseInt(br.readLine());

        StringTokenizer st;
        
        int sum = 0;

        for (int i = 0; i < n; i++) {
            st = new StringTokenizer(br.readLine());

            int a = Integer.parseInt(st.nextToken());
            int b = Integer.parseInt(st.nextToken());
            
            sum += a*b;
        }

        System.out.println(sum == total ? "Yes" : "No");
    }
}