From now on, I will add some topic wise problems which I face regularly. I think it will help new commers like me. Thank you :)
1.Cumulative sum/ prefix sum :
(https://codeforces.me/problemset/problem/363/B)
(https://codeforces.me/problemset/problem/313/B)
(https://codeforces.me/problemset/problem/1363/B)
(https://codeforces.me/problemset/problem/433/B)
(https://codeforces.me/problemset/problem/296/C)
(https://codeforces.me/problemset/problem/816/B)
(https://codeforces.me/problemset/problem/1341/B)
(https://codeforces.me/problemset/problem/961/B)
(https://codeforces.me/problemset/problem/276/C)
(https://codeforces.me/problemset/problem/1678/B1)
(https://codeforces.me/problemset/problem/1678/B1)
(https://www.spoj.com/problems/CSUMQ/en/)
(https://www.spoj.com/problems/RANGESUM/en/)
(https://www.codechef.com/problems/QUALPREL)
(https://www.codechef.com/problems/PTMSSNG)
(https://www.codechef.com/problems/MEX)
(https://www.codechef.com/problems/PTMSSNG)
(https://www.eolymp.com/en/problems/6959)
(https://onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=924)
Here are some Binary search related problems
2.Binary Search
(https://codeforces.me/problemset/problem/474/B)
(https://lightoj.com/problem/points-in-segments)
(https://lightoj.com/problem/counting-triangles)
(https://lightoj.com/problem/points-in-segments-ii)
(https://lightoj.com/problem/crossed-ladders)
Thank you :)