排序单链表反转
//insertsort
void InsertSort(int a[],int n){int j;for(int i = 2;i <= n;i ++){if(a[i] < a[i-1]){a[0] = a[i];for(j = i - 1;a[j] > a[0];j--){if(a[j+1] < a[j]){a[j+1] = a[j];}}a[j+1] = a[0];}}
}
//下屆
void lowerBound(int *a, int left, int right, int v){int mid;while(left < right){mid = (left + right) / 2;if(v <= a[mid]) right = mid;else left = mid + 1;}return left;
}//上界
void upperBound(int *a, int left, int right, int v){int mid;while(left < right){mid = (left + right) / 2;if(v >= a[mid]) left = mid + 1;else right = mid;}
}void BubbleSort(int a[], int n){for(int i = 0;i < n -1 ;i ++){for(int j = n-1;j > ilj--){if(a[j] < a[j-1]){swap(a[j],a[j-1]);flag = true;}}if(!flag) break;}
}int Partition(int a[], int low, int high){int pivot = a[low];while(low < high){while(low < high && a[high] <= pivot) high --;a[low] = a[high];while(low < high && a[low] >= pivot) low ++;a[high] = a[low];}a[low] = pivot;return low;
}void QuickSort(int a[], int low, int high){int position = Partition(a,low,high);QuickSort(a,low,position-1);QuickSort(a,position+1,high)
}void SelectSort(int a[], int n){for(int i = 0;i < n-1;i++){min = i;for(int j = i+1;j < n;j++){if(a[j] < a[min]){min = j;}}if(min != i) swap(a[i],a[min]);}
}int b[Max];
void Merge(int *a, int low, int mid, int high){for(int i = low, i <= high;i ++)b[i] = a[i];int k = low, r = mid+1;while(k <= mid && r <= high){if(b[k] < b[r]){a[k] = b[k++];}else{a[k++] = b[r++];}}while( k <= mid) a[k] = b[k++];while( r <= high) a[k++] = b[r++];
}void MergeSort(int *a, int low,int high){if(low < high){int mid = (low + high) / 2;MergeSort(a,low,mid);MergeSort(a,mid+1,high);Merge(a,low,mid,high)}
}void BuildMaxHeap(int a[], int len){for(int i = len/2;i > 0;i --)AjustDown(a,i,len);
}void AjustDown(int a[], int k, int len){a[0] = a[k];for(int i = 2 * k;i <= len;i *= 2){if(i < len && a[i] < a[i+1]) i ++;if(a[0] > a[i]) break;else{a[k] = a[i];k = i;}}a[k] = a[0];
}void HeapSort(int a[], int len){BuildMapHeap(a,len);for(int i = len ;i > 0;i--){swap(a[i],a[1]);AjustDown(a,1,i-1);}
}ListNode* ReverseList(ListNode *head){ListNode *pNode = head;ListNode *pPrev = NULL;while(pNode != NULL){ListNode *pNext = pNode->next;pNode->next = pPrev;pPrev = pNode;pNode = pNext;}return pPrev;
}
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