(应用排序算法编程7.2.1)UVA 10327 Flip Sort(使用冒泡排序来求逆序对)

/* * UVA_10327.cpp * *  Created on: 2013年11月1日 *      Author: Administrator */#include <iostream>#include <cstdio>using namespace std;const int maxn = 1010;int main(){int a[maxn];int n;while(scanf("%d",&n)!=EOF){int i;for(i = 1 ; i <= n ; ++i){scanf("%d",&a[i]);}bool flag = true;int ans = 0;while(flag){//只要序列中出现逆序对,就不断的从前往后扫flag = false;for(i = 1 ; i < n ; ++i){if(a[i] > a[i+1]){int temp = a[i+1];//这三行也可以换成swap(a[i],a[i+1])a[i+1] = a[i];a[i] = temp;ans++;flag = true;}}}printf("Minimum exchange operations : %d\n",ans);}return 0;}