import sys

def main():
    data = sys.stdin.read().split()
    ptr = 0
    N = int(data[ptr])
    ptr += 1
    M = int(data[ptr])
    ptr += 1
    # 读取M条边，但不需要处理
    for _ in range(M):
        ptr += 3
    print(N)

if __name__ == "__main__":
    main()