Codeforces Round 321 (Div. 2)
E
Kefa and Watch
Codeforces
2500
原题
← D→
翻译中…

One day Kefa the parrot was walking down the street as he was on the way home from the restaurant when he saw something glittering by the road. As he came nearer he understood that it was a watch. He decided to take it to the pawnbroker to earn some money.

翻译中…

The pawnbroker said that each watch contains a serial number represented by a string of digits from $0$ to $9$, and the more quality checks this number passes, the higher is the value of the watch. The check is defined by three positive integers $*l*$, $*r*$ and $*d*$. The watches pass a check if a substring of the serial number from $*l*$ to $*r*$ has period $*d*$. Sometimes the pawnbroker gets distracted and Kefa changes in some substring of the serial number all digits to $*c*$ in order to increase profit from the watch.

翻译中…

The seller has a lot of things to do to begin with and with Kefa messing about, he gave you a task: to write a program that determines the value of the watch.

翻译中…

Let us remind you that number $*x*$ is called a period of string $*s*$ ($1 ≤ *x* ≤ |*s*|$), if $*s*_{*i*}  =  *s*_{*i* + *x*}$ for all $*i*$ from 1 to $|*s*|  -  *x*$.

翻译中…

Input

翻译中…

The first line of the input contains three positive integers $*n*$, $*m*$ and $*k*$ ($1 ≤ *n* ≤ 10^{5}$, $1 ≤ *m* + *k* ≤ 10^{5}$) — the length of the serial number, the number of change made by Kefa and the number of quality checks.

翻译中…

The second line contains a serial number consisting of $*n*$ digits.

翻译中…

Then $*m* + *k*$ lines follow, containing either checks or changes.

翻译中…

The changes are given as 1 $*l*$ $*r*$ $*c*$ ($1 ≤ *l* ≤ *r* ≤ *n*$, $0 ≤ *c* ≤ 9$). That means that Kefa changed all the digits from the $*l*$-th to the $*r*$-th to be $*c*$.

翻译中…

The checks are given as 2 $*l*$ $*r*$ $*d*$ ($1 ≤ *l* ≤ *r* ≤ *n*$, $1 ≤ *d* ≤ *r* - *l* + 1$).

翻译中…

Output

翻译中…

For each check on a single line print "YES" if the watch passed it, otherwise print "NO".

翻译中…

Note

翻译中…

In the first sample test two checks will be made. In the first one substring "12" is checked on whether or not it has period 1, so the answer is "NO". In the second one substring "88", is checked on whether or not it has period 1, and it has this period, so the answer is "YES".

翻译中…

In the second statement test three checks will be made. The first check processes substring "3493", which doesn't have period 2. Before the second check the string looks as "334334", so the answer to it is "YES". And finally, the third check processes substring "8334", which does not have period 1.

翻译中…

样例

Input #1
3 1 2
112
2 2 3 1
1 1 3 8
2 1 2 1
Output #1
NO
YES
InputCopy OutputCopy
Input #2
6 2 3
334934
2 2 5 2
1 4 4 3
2 1 6 3
1 2 3 8
2 3 6 1
Output #2
NO
YES
NO
InputCopy OutputCopy
题目信息
题号
580E
时间限制
1.5 s
内存限制
256 MB
标签
数据结构
哈希
字符串

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。