During Upsolving, I have seen that some problems can be solved using the prefix sum method way more easily and efficiently. Which topic is new for me. So, I tried practicing it from cses problemset but it has only 3-4 problems related to prefix sum and codeforces doesn't have any ...
http://www.spoj.com/problems/FUNFACT/ (4) //VERY NICE — Sterling Approximation↵↵http://codeforces.com/contest/16/problem/C (3) //[or math][simple formula check]↵↵http://codeforces.com/contest/21/problem/C (3) //[NICE][prefix-sum+lower_bound]↵↵http://...
Euler();62cin >>n;63intx;64LL sum =0;65for(inti =1; i <= n; i++)66{67cin >>x;68que[x].push(i);69cnt[x]++;70sum +=x;71}72cnt1 = cnt[1], cnt2 = cnt[2];73LL pre =0;74for(inti =0; i < tot && prime[i] <= sum; i++)75{76LL tmp = prime[i] -pre;...
Codeforces1485F - Copy or Prefix Sum 题目链接 参考题解链接 思路 最基本的dpdp状态转移方程都能推。 dp[i][j]:dp[i][j]:到第ii个数,前缀和为jj的所有方案数。 考虑第aiai的两种选择方式: 1、当ai=biai=bi时,前缀和为jj时: dp[i][j]=dp[i−1][j−bi](−inf≤j≤inf)dp[i][j]=...
C. Minimizing the Sum D. Shop Game E. Unique Array F. Card Pairing Educational Codeforces Round 164 (Rated for Div. 2) A. Painting the Ribbon B. Make It Ugly C. Long Multiplication D. Colored Balls E. Chain Reaction F. Unique Strings ...
https://mrsrz.github.io/CF1303G/ mrsrz added Gitalk https://mrsrz.github.io/CF1303G/ labels Sep 27, 2020 Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment Assignees No one assigned Labels Gitalk https://mrsrz.github.io/CF1303G/ ...
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Samples 输入数据 1 4 4 2 3 2 4 1 1 3 3 7 Copy 输出数据 1 36 Copy Note The best path in the first example is from vertex333to vertex111. It gives the sequence[3,3,7,1][3, 3, 7, 1][3,3,7,1], and the sum of prefix sums is363636....
Angel_Kitty 2018/04/09 2.2K0 [Atcoder][CF]简单题选做练习笔记 dpsum 板刷题单:https://www.luogu.com.cn/training/2018#problems Clouder0 2022/09/23 5990 ShenduCC LV.1 关注 文章 674 获赞 3K 专栏 1 作者相关精选 换一批 LeetCode Weekly Contest 281 LeetCode weekly contest 278 (amazon pay...
Codeforces部门2,A # And a2oj Ladder 4 some problems Ladder URL: http://a2oj.com/Ladder.jsp?ID=4 难度等级:2 问题提示: 1- 4A. Watermelon: http://codeforces.com/problemset/problem/4/A 2- 71A. Way Too Long Words: http://codeforces.com/problemset/problem/71/A 3- 118A. String Tas...