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崩溃了不知道为什么就AC了.什么原理 int main() { int n,i,j,t,k,a[10001]; scanf("%d",&n); while(n--) { scanf("%d",&i); for(j=1;j<=i;j++) scanf("%d",&a[j]); k=0; for(j=1;j<=i;j++) { if(a[j]!=j) { t=a[a[j]]; a[a[j]]=a[j]; a[j]=t; j--; k++; } } printf("%d\n",k); } return 0; } Followed by:
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