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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; } Followed by:
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