倘若存在 1,那么答案是 \(n-cnt_1\). 否则,设最短的公约数为 1 的区间长度为 \(minlen\),答案是 \(minlen-1+n-1\). #include <iostream> #include <cstdio> using namespace std; int n, ans, gcd[2005][2005], cnt; int getGcd(int x, int y){ return !y?x:getGcd(y, x%y); } int getAns(){…
C. Pride time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacent elements from a, sa…
C. Pride time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacentelements from a, say…
You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacent elements from a, say xand y, and replace one of them with gcd(x, y), where gcd denotes the greatest common divisor. What is the minimum nu…
题目连接 : http://codeforces.com/problemset/problem/891/A You have an array a with length n, you can perform operations. Each operation is like this: choose two adjacent elements from a, say x and y, and replace one of them with gcd(x, y), where gcd deno…
Text My daughter, Jane, never dreamed of receiving a letter from a girl of her own age in Holland. Last year,we were traveling across the Channel and Jane put a piece of paper with her name an address on it into a bottle. She throw the bottle into th…
