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说下一种解法 329ms遍历位置1~n 当位置i的值a[i]!=i时说明不对 找到值为i的位置j 即a[j]==i 交换a[i]与
a[j] 同时总交换数sum++
核心代码如下
int swaps(int n)
{
int sum=0;
for(int i=1;i<n;i++)
{
if(a[i]!=i)
{
sum++;
int j;
for(j=i+1;j<=n;j++)
if(a[j]==i)break;
swap(a[i],a[j]);
}
}
return sum;
}
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