交互题就是程序与电脑代码的交互. 比如没有主函数的程序,而spj则给你一段主函,就变成了一个整体函数. 还有一种就是程序和spj之间有互动,这个用到fflush(stdout);这个函数就可以实现交互了 fflush(stdin) 作用:清理标准输入流,把多余的未被保存的数据丢掉 fflush(stdout) 作用:清空输出缓冲区,并把缓冲区内容输出 CF1103B Game with modulo 题意:有一个需要你猜的数a,你每次可以猜两个数,如果x%a>=y%a,则返回x,否则返回y.你最…

题目大意:交互题,有一个数$a(a\leqslant10^9)$,需要猜出它的值,一次询问为你两个数字$x,y(x,y\in[0,2\times10^9])$: 若$x\bmod a\geqslant y\bmod a$,返回字符$x$ 若$x\bmod a< y\bmod a$,返回字符$y$ 你最多询问$60$次 题解:$60$,差不多是$2\log_2n$. 令$x=ka+b(k\in\mathbb{N},0\leqslant b<a)$,$2x=(2k+[2b\geqslant a])…

简易中文题目 猜一个数字 \(a\),而你可以向机器提问一对 \((x,y)\) ,如果 \(x\bmod a\ge y \bmod a\) 机器返回字符串 x,反之返回字符串 y . 询问不能超过 \(60\) 次,请你猜出 \(a\) . 解析 一道十分巧妙的数学题+交互题(人生第二道交互题). 考虑我们询问的数对是 \((x,2x)\) ,那么就有: \(a>2x\) ,那么 \(x\bmod a < 2x\bmod a\) \(x< a \le 2x\) ,那么 \(2x\bmo…

B. Modulo Sum time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a sequence of numbers a1, a2, ..., an, and a number m. Check if it is possible to choose a non-empty subsequence…

题目链接: B. Modulo Sum time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given a sequence of numbers a1, a2, ..., an, and a number m. Check if it is possible to choose a non-empty subse…

Raising Modulo Numbers Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 6373   Accepted: 3760 Description People are different. Some secretly read magazines full of interesting girls' pictures, others create an A-bomb in their cellar, oth…

B. Modulo Sum Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/577/problem/B Description You are given a sequence of numbers a1, a2, ..., an, and a number m. Check if it is possible to choose a non-empty subsequence aij such…

Raising Modulo Numbers Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 5477   Accepted: 3173 Description People are different. Some secretly read magazines full of interesting girls' pictures, others create an A-bomb in their cellar, oth…

POJ1995 Raising Modulo Numbers 计算(A1B1+A2B2+ ... +AHBH)mod M. 快速幂,套模板 /* * Created: 2016年03月30日 23时01分45秒 星期三 * Author: Akrusher * */ #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <ctime> #…

Raising Modulo Numbers Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 5934   Accepted: 3461 Description People are different. Some secretly read magazines full of interesting girls' pictures, others create an A-bomb in their cellar, oth…