题目要求找到在[1, n]范围内，经过k次特定操作（将数字变为二进制1的个数）后变成1的特殊数字的数量。通过递推关系和数位DP方法解决，最终对结果取模10^9 + 7。"
62459549,6283203,React-lazyload：实现高效懒加载的秘籍,"['前端开发', 'React', '性能优化', '图片懒加载', '资源管理']
C. Travelling Salesman and Special Numbers
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output
The Travelling Salesman spends a lot of time travelling so he tends to get bored. To pass time, he likes to perform operations on numbers. One such operation is to take a positive integer x and reduce it to the number of bits set to 1 in the binary representation of x. For example for number 13 it's true that&
最低0.47元/天 解锁文章
扫一扫
464
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
