DCP-300: Shan and String Back to All Problems

Hard Data Structures > Segment Tree/Interval Tree


There is a little boy name Shan. One day he came up with a problem. Now you have to solve that problem. You will be given a Binary string S which contain either 0 or 1. Now you have to do two types of task. 1 x :- Change the value at x'th position. If the value is 1 then change it to 0 Or, if the value is 0 then change it to 1. (Toggle operation) 2 x y :- Find number of 1's block between two indexes x and y (inclusive). **A block of 1's is a maximal consecutive substring that only contains 1.** Input: ------- The first line of input contains integers N and M. N is the length of the string and M is the number of tasks to do. The Next line contains a string S. The Next M line contains a task either task 1 or 2. **( 1<=N<=100000 , 1<=M<=100000, 1<=x<=y<=N )** Output: ------- For each second type of task you have to output one integer representing it's result. Sample Input ------------ 10 5 1101011101 2 1 10 2 7 10 1 8 2 7 10 2 2 8 Sample Output ------------- 4 2 2 3


Problem Setter:

S.M. SHAHEEN SHA

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Problem Limits

Language Time Limit (seconds)
C 2.00
C++ 2.00
C++14 2.00
C# 3.00
Go 3.00
Java 3.00
JavaScript 3.00
Objective-C 3.00
Perl 3.00
PHP 3.00
Python 3.00
Python3 3.00
Ruby 3.00
VB.Net 3.00

Problem Stats

47/100

Solve/Submission

Ranking

# User Language Timing
01 Morass Cpp14 0.02s
02 Nezz Cpp 0.03s
03 njrafi Cpp14 0.03s
04 feodorv Cpp14 0.03s
05 jahid_ict Cpp14 0.04s
06 last_man Cpp14 0.04s
07 ksohan Cpp14 0.04s
08 GustavoCandido Cpp14 0.04s
09 heiseish Cpp 0.05s
10 Robbinb1993 Cpp14 0.05s
11 Nirjhor Cpp14 0.05s
12 khatribiru Cpp14 0.05s
13 ____ Cpp14 0.05s
14 fsshakkhor Cpp14 0.05s
15 Sarwar05 Cpp14 0.06s
16 mamun4122 Cpp14 0.06s
17 sahedsohel Cpp14 0.06s
18 rubabredwan Cpp14 0.06s
19 Jisancse Cpp 0.06s
20 tariqiitju Cpp 0.06s
21 Protap_Ghose Cpp14 0.06s
22 ehsan_sshuvo96 Cpp 0.06s
23 sayedgkm Cpp14 0.06s
24 Tahmid Cpp 0.07s
25 Rajib_119 Cpp14 0.07s
26 _dipu Cpp14 0.07s
27 adamantium Cpp14 0.07s
28 imAnik Cpp14 0.07s
29 Double_O Cpp14 0.08s
30 as_couple Cpp14 0.09s
31 acraider Cpp14 0.10s
32 skmonir Cpp14 0.11s
33 seyedssz Cpp14 0.12s
34 nasib_mbstu Cpp 0.13s
35 Digonta Cpp 0.15s
36 I_See_You Cpp14 0.20s
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