From f279107065146a4940f5e73602a1c3c09e58b31d Mon Sep 17 00:00:00 2001 From: Santo Cariotti Date: Sun, 18 Oct 2020 18:56:43 +0200 Subject: chore: name of first year folder --- I_anno/Programmazione_2/algorithms/binarysearch.cc | 33 -------------- I_anno/Programmazione_2/algorithms/cbrt.cc | 37 --------------- .../Programmazione_2/algorithms/insertionsort.cc | 42 ----------------- I_anno/Programmazione_2/algorithms/log.cc | 25 ----------- I_anno/Programmazione_2/algorithms/mergesort.cc | 52 ---------------------- I_anno/Programmazione_2/algorithms/pow.cc | 25 ----------- I_anno/Programmazione_2/algorithms/quicksort.cc | 38 ---------------- .../Programmazione_2/algorithms/selectionsort.cc | 46 ------------------- I_anno/Programmazione_2/algorithms/sqrt.cc | 46 ------------------- 9 files changed, 344 deletions(-) delete mode 100644 I_anno/Programmazione_2/algorithms/binarysearch.cc delete mode 100644 I_anno/Programmazione_2/algorithms/cbrt.cc delete mode 100644 I_anno/Programmazione_2/algorithms/insertionsort.cc delete mode 100644 I_anno/Programmazione_2/algorithms/log.cc delete mode 100644 I_anno/Programmazione_2/algorithms/mergesort.cc delete mode 100644 I_anno/Programmazione_2/algorithms/pow.cc delete mode 100644 I_anno/Programmazione_2/algorithms/quicksort.cc delete mode 100644 I_anno/Programmazione_2/algorithms/selectionsort.cc delete mode 100644 I_anno/Programmazione_2/algorithms/sqrt.cc (limited to 'I_anno/Programmazione_2/algorithms') diff --git a/I_anno/Programmazione_2/algorithms/binarysearch.cc b/I_anno/Programmazione_2/algorithms/binarysearch.cc deleted file mode 100644 index c9b4cd7..0000000 --- a/I_anno/Programmazione_2/algorithms/binarysearch.cc +++ /dev/null @@ -1,33 +0,0 @@ -#include - -using namespace std; - -bool bs(int a[], int i, int j, int x) { - if(j x) - return bs(a, i, mid-1, x); - return bs(a, mid+1, j, x); -} - -bool bs2(int a[], int i, int j, int x) { - while(i <= j) { - int mid = i+(j-i)/2; - if(a[mid] == x) return true; - if(a[mid] < x) - i = mid+1; - else - j = mid-1; - } - return false; -} - -int main() { - int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; - for(int i = 0; i < 12; ++i) - cout << i << ' '< - -using namespace std; - -int cbrt(int n) { - int i = 0; - int j = n; - int q = (i+j)/2; - while(q*q*q != n) { - q = (i+j)/2; - if(q*q*q < n) - i=q; - else - j=q; - } - return q; -} - -double cbrt2(int n) { - int i = 1; - while(i*i*i <= n) - ++i; - // precision - - --i; - while(i*i*i < n) - i+=0.000001; - - return i; -} - -int main() { - int i; - cin >> i; - cout << i << ' ' << cbrt(i) << endl; - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/insertionsort.cc b/I_anno/Programmazione_2/algorithms/insertionsort.cc deleted file mode 100644 index 9b309d6..0000000 --- a/I_anno/Programmazione_2/algorithms/insertionsort.cc +++ /dev/null @@ -1,42 +0,0 @@ -#include - -using namespace std; - -void insertionsort(int a[], int n) { - for(int i = 1; i < n; ++i) { - int j = i-1; - int key = a[i]; - while(j > -1 && a[j] > key) { - swap(a[j+1], a[j]); - --j; - } - a[j+1] = key; - } -} - -void insertionsort_rec(int a[], int n) { - if(n < 2) return; - insertionsort_rec(a, n-1); - - int key = a[n-1]; - int j = n-2; - - while(j > -1 && a[j] > key) { - swap(a[j+1], a[j]); - --j; - } - - a[j+1] = key; - -} - -int main() { - int arr[10] = {3, 450, 12, 4, -1, 0, 24, 95, 123, 0}; - for(int i = 0; i < 10; ++i) - cout << *(arr+i) << ' '; - cout << endl; - insertionsort_rec(arr, 10); - for(int i = 0; i < 10; ++i) - cout << *(arr+i) << ' '; - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/log.cc b/I_anno/Programmazione_2/algorithms/log.cc deleted file mode 100644 index 1e49a2e..0000000 --- a/I_anno/Programmazione_2/algorithms/log.cc +++ /dev/null @@ -1,25 +0,0 @@ -#include - -using namespace std; - -double log(double n) { - if(n <= 2) return 1.0; - return 1.0 + log(n/2); -} - -int log2(double n) { - int a = 1; - - while(n > 2) { - n /= 2; - ++a; - } - - return a; -} - -int main() { - for(int i = 0; i < 25; ++i) - cout << i << ' ' << log(i) << ' ' << log2(i) << endl; - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/mergesort.cc b/I_anno/Programmazione_2/algorithms/mergesort.cc deleted file mode 100644 index 68d28cb..0000000 --- a/I_anno/Programmazione_2/algorithms/mergesort.cc +++ /dev/null @@ -1,52 +0,0 @@ -#include - -using namespace std; - -void merge(int A[], int l, int q, int r) { - int i = l; - int j = q+1; - int k = l; - int B[r]; - - while((i <= q) && (j <= r)) { - if(A[i] <= A[j]) - B[k] = A[i++]; - else - B[k] = A[j++]; - - k++; - } - - while(i <= q) - B[k++] = A[i++]; - - while(j <= r) - B[k++] = A[j++]; - - for(k = l; k <= r; ++k) - A[k] = B[k]; -} - -void mergesort(int A[], int l, int r) { - if(l < r) { - int q = (l+r)/2; - mergesort(A, l, q); - mergesort(A, q+1, r); - merge(A, l, q, r); - } -} - - -int main() { - int a[] = {7,1,22,3,2,12,27,31,6}; - for(int i = 0; i < 9; ++i) { - cout << a[i] << ' '; - } - cout << endl; - mergesort(a, 0, 8); - for(int i = 0; i < 9; ++i) { - cout << a[i] << ' '; - } - - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/pow.cc b/I_anno/Programmazione_2/algorithms/pow.cc deleted file mode 100644 index 16cf419..0000000 --- a/I_anno/Programmazione_2/algorithms/pow.cc +++ /dev/null @@ -1,25 +0,0 @@ -#include - -using namespace std; - -int pow(int x, int y) { - int a = 1; - - for(int i = 0; i < y; ++i) - a*=x; - - return a; -} - - -int pow2(int x, int y) { - if(y < 1) return 1; - - return x*pow(x, y-1); -} - -int main() { - cout << pow(2, 5) << endl; - cout << pow2(2, 5) << endl; - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/quicksort.cc b/I_anno/Programmazione_2/algorithms/quicksort.cc deleted file mode 100644 index 795bd7b..0000000 --- a/I_anno/Programmazione_2/algorithms/quicksort.cc +++ /dev/null @@ -1,38 +0,0 @@ -#include - -using namespace std; - -int partition(int A[], int l, int r) { - int x = A[r]; - int i = l-1; - - for(int j = l; j < r; ++j) { - if(A[j] <= x) { - swap(A[++i], A[j]); - } - } - swap(A[++i], A[r]); - return i; -} - -void quicksort(int A[], int l, int r) { - if(l < r) { - int q = partition(A, l, r); - quicksort(A, l, q-1); - quicksort(A, q+1, r); - } -} - -int main() { - int a[] = {7,1,22,3,2,12,27,31,6}; - for(int i = 0; i < 9; ++i) { - cout << a[i] << ' '; - } - cout << endl; - quicksort(a, 0, 8); - for(int i = 0; i < 9; ++i) { - cout << a[i] << ' '; - } - - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/selectionsort.cc b/I_anno/Programmazione_2/algorithms/selectionsort.cc deleted file mode 100644 index 57dcc17..0000000 --- a/I_anno/Programmazione_2/algorithms/selectionsort.cc +++ /dev/null @@ -1,46 +0,0 @@ -#include -#include - -using namespace std; - -void selectionsort(int a[], int n) { - for(int i = 0; i < n-1; ++i) { - int min = i; - for(int j = i+1; j < n; ++j) { - if(a[j] < a[min]) - min = j; - } - - swap(a[min], a[i]); - } -} - -int min_i(int a[], int i, int j) { - if(i == j) return i; - - int k = min_i(a, i+1, j); - return (a[i] < a[k]) ? i : k; -} - -void selectionsort_rec(int* a, int b, int e=0) { - if(b == e) return; - - int key = min_i(a, e, b-1); - if(key != e) - swap(a[key], a[e]); - - selectionsort_rec(a, b, e+1); -} - -int main() { - int arr[] = {3,450,12,4,-1,0,24,95,123,0}; - for(int i = 0; i < 10; ++i) { - cout << *(arr+i) << ' '; - } - cout << endl; - selectionsort_rec(arr, 10); - for(int i = 0; i < 10; ++i) { - cout << *(arr+i) << ' '; - } - return 0; -} diff --git a/I_anno/Programmazione_2/algorithms/sqrt.cc b/I_anno/Programmazione_2/algorithms/sqrt.cc deleted file mode 100644 index aa6b032..0000000 --- a/I_anno/Programmazione_2/algorithms/sqrt.cc +++ /dev/null @@ -1,46 +0,0 @@ -#include - -using namespace std; - -double abs(double n) { - if(n < 0) return -n; - - return n; -} - - -double sq(int n) { - double x = n; - double y = 1; - while(x-y > 0.0000001) { - x = (x+y)/2; - y = n/x; - } - return x; -} - -double sq2_n(double n, double a) { - if(abs(a*a - n) <= 0.000001) { - return a; - } - - return sq2_n(n, (a+n/a)/2); -} - -double sq2(int n) { - return sq2_n(n, n/2); -} - -double sqrt_d(int n) { - double x = 1; - while(abs(x*x-n)>=0.0000001) { - x = ((n/x)+x)/2; - } - return x; -} - -int main() { - cout << sq(81) << endl; - cout << sq2(81) << endl; - return 0; -} -- cgit v1.2.3-18-g5258