Am adaugat materialele din săpt trecute.

python/laborator/lab4/1.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Wed Mar 11 14:12:41 2026
+
+@author: alex
+"""

python/laborator/lab4/2.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 14:16:54 2026
+
+@author: alex
+"""
+
+#Lab 4
+
+note = [7, 8, 9, 10]
+puncte = [(1,2), (3,4, (5,6))]
+print(note[0])
+print(note[-1])
+print(note[-2])
+
+v = [10, 20, 30, 40, 50, 60, 70, 80]
+print(v[2:5])
+print(v[:5])
+print(v[::2])
+print(v[::-1])
+
+note = [7,8,9,10]
+
+for i, val in enumerate(note):
+    print(f"{i}  {val}")

python/laborator/lab4/untitled2.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 14:28:27 2026
+
+@author: alex
+"""
+
+def inverseaza(lista):
+    lung = len(lista)
+    inv = []
+    for i in range(0,lung):
+        inv.append(lista[lung-1-i])
+    return inv
+lista = [1,3,4,2,5,6]
+print(lista)
+lista = inverseaza(lista)
+print(lista)
+
+def inverseaza_2(lista):
+    lista_2 = []
+    for n in lista:
+        lista_2.insert(0,n)
+    return lista_2
+
+lista = inverseaza_2(lista)
+print(lista)

python/laborator/lab4/untitled3.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 14:38:04 2026
+
+@author: alex
+"""
+
+#def comune(A,B):
+#    intrare = ""
+#    print("adauga in A: ")
+#    while intrare != -1:
+#        intrare = input()
+#        A.append(intrare)
+#    print("adauga in B: ")
+#    A = int(A)
+#    while intrare != -1:
+#        intrare = input()
+#        B.append(intrare)
+#    B = int(B)
+#    print(A)
+#    print(B)
+#
+#A = []
+#B = []
+#comune(A,B)
+
+def comune(A,B):
+    A = set(A)
+    B = set(B)
+    intersectia = A & B
+    intersectia = list(intersectia)
+    intersectia.sort()
+    return intersectia
+
+A = [1,2,3,4,4]
+B = [3,4,5,6,7]
+C = comune(A,B)
+print(C)

python/laborator/lab4/untitled4.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 14:49:16 2026
+
+@author: alex
+"""
+# Scrie o functie rotire lista k care roteste lista circular la dreapta cu n elemente
+def rotire(lista, k):
+    lista_2 = []
+    for i in lista:
+        lista_2=lista[k+1:] + lista[:-k]
+    return lista_2
+
+lista =[1,2,3,4,5]
+lista = rotire(lista,2)
+print(lista)

python/laborator/lab4/untitled5.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 14:55:47 2026
+
+@author: alex
+"""
+
+def inverseaza_dict(d):
+    d_2 = dict()
+    for k, el in d.items():
+        d_2[el]=k
+    return d_2
+D = {"a":1 , "b":2, "c":3}
+D = inverseaza_dict(D)
+print(D)

python/laborator/lab4/untitled6.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 15:06:25 2026
+
+@author: alex
+"""
+def cel_mai_frecvent(lista):
+    frec = [0] * (max(lista) + 1)
+
+    for n in lista:
+        frec[n] += 1
+
+    maxim = 0
+    for i in range(len(frec)):
+        if frec[i] > maxim:
+            maxim = frec[i]
+            el = i
+
+    return el
+
+lista = [1, 3, 2, 3, 1, 3, 2]
+print(max(lista))
+print(cel_mai_frecvent(lista))

python/laborator/lab4/untitled7.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 15:24:08 2026
+
+@author: alex
+"""
+
+def cel_mai_frecvent(lista):
+    frec = [0] * (max(lista) + 1)
+
+    for n in lista:
+        frec[n] += 1
+
+    maxim = 0
+    for i in range(len(frec)):
+        if frec[i] > maxim:
+            maxim = frec[i]
+            el = i
+
+    return el
+
+
+def frecventa(lista):
+    rezultat = {}
+    for x in lista:
+        if x in rezultat:
+            rezultat[x] += 1
+        else:
+            rezultat[x] = 1
+    return rezultat
+
+
+lista = [1, 3, 2, 3, 1, 3, 2]
+print(max(lista))
+print(cel_mai_frecvent(lista))
+note = [7,8,9,7,10,8,7,9,9,10,1]
+freq = frecventa(note)
+print(freq)
+for nota,cnt in sorted(freq.items()):
+    print(f"Nota {nota}: aparede {cnt} ori")

python/laborator/lab4/untitled8.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Mar 13 15:34:19 2026
+
+@author: alex
+"""
+
+def f(x):
+    return x*x -3*x +2
+tabel = {}
+for x in range(-3,6):
+    tabel[x] = f(x)
+#afisare tabel
+
+print(f"{'x':>5} | {'f(x)':>6}")
+print("-" * 15)
+for x, val in tabel.items():
+    print(f"{x:>5} | {val:>6}")
+
+radacini = [x for x,val in tabel.items() if val == 0]
+print(f"\nRadacini in [-3,5]: {radacini}")