[HDU3709]Balanced Number 试题描述 A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box with weight indicated by the digit. When a pivot is placed at some digit…

题目链接:https://vjudge.net/problem/HDU-3709 Balanced Number Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 6615    Accepted Submission(s): 3174 Problem Description A balanced number is a non-nega…

Balanced Number Problem Description A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box with weight indicated by the digit. When a pivot is placed at some…

 Balanced Number Time Limit:3000MS     Memory Limit:0KB     64bit IO Format:%lld & %llu Description A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box wi…

A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box with weight indicated by the digit. When a pivot is placed at some digit of the number, the distance f…

A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box with weight indicated by the digit. When a pivot is placed at some digit of the number, the distance f…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3709 题目大意就是求给定区间内的平衡数的个数 要明白一点:对于一个给定的数,假设其位数为n,那么可以有n个不同的位作为支点,但每次只能有一个支点 定义dp[len][pos][k],len表示当前还需处理的位数,pos表示当前的所选的支点的位置,k表示计算到当前的力矩之和(即从最高位到第len+1位) 容易知道如果在某一个len>1的位置k已经小于0,那么就可以直接剪枝 代码如下 : #includ…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3709 题目大意: 求区间 \([x, y]\) 范围内"平衡数"的数量. 所谓平衡数是指:以某一位为支点,它左边的所有位的数乘以它到支点的距离之和等于它右边的所有位的数乘以它到支点的距离之和. 比如, \(4139\) 是平衡数,因为以 \(3\) 为支点, 左边的每一位数与距离的乘积和为 \(4 \times 2 + 1 \times 1 = 9\): 右边的每一位数与距离的乘积和为 \…

Problem Description A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box with weight indicated by the digit. When a pivot is placed at some digit of the nu…

链接: https://vjudge.net/problem/HDU-3709 题意: A balanced number is a non-negative integer that can be balanced if a pivot is placed at some digit. More specifically, imagine each digit as a box with weight indicated by the digit. When a pivot is placed…