qq_51737737的博客

C. Sequence 题意：给定一个序列，每次操作可以把某个数+1或-1。要求把序列变成非降数列的最小操作数。 //#pragma GCC optimize(2) //#pragma GCC optimize(3,"Ofast","inline") #include<bits/stdc++.h> #define int long long #define fi first #define se second #define pii pair<int,int> #define IOS

数据备份 题意：在数组中选择k个数使得和最小，且不能相邻。 //#pragma GCC optimize(2) //#pragma GCC optimize(3,"Ofast","inline") #include<bits/stdc++.h> #define int long long #define fi first #define se second #define pii pair<int,int> #define IOS ios::sync_with_stdio(false