题解 | 字符串操作
字符串操作
https://www.nowcoder.com/practice/06a5336b64e3481fbbcc1f7d5cba548d
# 读取数据
n,m = map(int,input().strip().split())
s = list(input().strip())
# 进行三次操作
for _ in range(m):
star,end,s1,s2 = input().strip().split(" ")
for i in range(int(star)-1, int(end)):
if s[i] == str(s1):
s[i] = str(s2)
print("".join(s))
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