A. Taymyr is calling you
Comrade Dujikov is busy choosing artists for Timofey's birthday and is recieving calls from Taymyr from Ilia-alpinist.
Ilia-alpinist calls every n minutes, i.e. in minutes n, 2n, 3n and so on. Artists come to the comrade every m minutes, i.e. in minutes m, 2m, 3m and so on. The day is z minutes long, i.e. the day consists of minutes 1, 2, ..., z. How many artists should be killed so that there are no artists in the room when Ilia calls? Consider that a call and a talk with an artist take exactly one minute.
The only string contains three integers — n, m and z (1 ≤ n, m, z ≤ 104).
Print single integer — the minimum number of artists that should be killed so that there are no artists in the room when Ilia calls.
1 1 10
10
1 2 5
2
2 3 9
1
Taymyr is a place in the north of Russia.
In the first test the artists come each minute, as well as the calls, so we need to kill all of them.
In the second test we need to kill artists which come on the second and the fourth minutes.
In the third test — only the artist which comes on the sixth minute.
题目链接:http://codeforces.com/contest/764/problem/A
分析:此题竟然是求n与m的最小公倍数,我TM是智障了!试了三次,开始以为就是t/(m×n),智障宝宝!
不说太多,都是泪啊!
下面给出AC代码:
1 #include <bits/stdc++.h> 2 using namespace std; 3 int gcd(int a,int b) 4 { 5 return b==0?a:gcd(b,a%b); 6 } 7 int main() 8 { 9 int n,m,t; 10 while(cin>>n>>m>>t) 11 { 12 int x=gcd(n,m); 13 int y=n*m/x; 14 int z=t/y; 15 cout<<z<<endl; 16 } 17 return 0; 18 }
题目链接:http://codeforces.com/contest/764/problem/B
分析:智障宝宝继续犯傻,看了半天,以为规律就是奇偶变换,结果样例都没过,再回头看了下题,傻了眼,原来就是每两项第i项和第n-i+1项交换!
智障宝宝第二摔!
下面给出AC代码:
1 #include <bits/stdc++.h> 2 using namespace std; 3 int a[200005]; 4 int main() 5 { 6 int n; 7 while(cin>>n) 8 { 9 for(int i=1;i<=n;i++) 10 cin>>a[i]; 11 for(int i=1;i<=(n+1)/2;i+=2) 12 { 13 swap(a[i],a[n-i+1]); 14 } 15 for(int i=1;i<=n-1;i++) 16 cout<<a[i]<<" "; 17 cout<<a[n]<<endl; 18 } 19 return 0; 20 }