Sort it
时间限制:1000 ms | 内存限制:65535 KB
难度:2
- 描述
- You want to processe a sequence of n distinct integers by swapping two adjacent sequence elements until the sequence is sorted in ascending order. Then how many times it need.
For example, 1 2 3 5 4, we only need one operation : swap 5 and 4.- 输入
- The input consists of a number of test cases. Each case consists of two lines: the first line contains a positive integer n (n <= 1000); the next line contains a permutation of the n integers from 1 to n.
- 输出
- For each case, output the minimum times need to sort it in ascending order on a single line.
- 样例输入
-
3 1 2 3 4 4 3 2 1
- 样例输出
-
0 6
- 来源
- ZJFC 2009-3 Programming Contest
- 上传者
好久以前没做出来的题,清理一下,的确是有点水
#include<stdio.h> #include<string.h> #include<algorithm> using namespace std; #define MAX 100100 int num[MAX]; int main() { int n; while(scanf("%d",&n)!=EOF) { for(int i=0;i<n;i++) scanf("%d",&num[i]); int sum=0; int t; for(int i=0;i<n;i++) { for(int j=i+1;j<n;j++) { if(num[i]>num[j]) { t=num[i],num[i]=num[j],num[j]=t; sum++; } } } printf("%d ",sum); } return 0; }