[C언어] 백준 : 공 (1547번)

#include <stdio.h>
int main()
{
    int m, x, y;
    int temp;
    int ball = 1;
    scanf("%d", &m);
    for (int i = 0; i < m; i++) {
        scanf("%d %d", &x, &y);
        if (x == ball) {
            ball = y;
        }
        else if (y == ball) {
            ball = x;
        }
    }
    printf("%d", ball);
    return 0;
}