py 为什么输出和测试点一样但wa

doraemon520 @ 2024-10-23 23:09:42

by doraemon520 @ 2024-10-23 23:10:56

n = int(input())
s = input()
ls = []
for i in range(n):
    a = input().split()
    if int(a[0]) == 1:
        s += a[1]
        ls.append(s)
    elif int(a[0]) == 2:
         s = s[int(a[1]):int(a[1])+int(a[2])]
         ls.append(s)
    elif int(a[0]) == 3:
         s = s[:int(a[1])] + a[2] + s[int(a[1]):]
         ls.append(s)
    elif int(a[0]) == 4:
        if a[1] in s:
            for j in range(len(s)-len(a[1])):
                if s[j:j+len(a[1])] == a[1]:
                    ls.append(str(j))
                    break
        else:
            ls.append('-1')

for i in ls:
    print(i)