
Recursivitate
Authored by Laurentiu Lambrinoc
Computers
11th Grade
Used 1+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Subprogramele f1, f2 și f3 sunt definite mai jos.
int f1(int n) { return n*(n+1)/2; }
int f2(int n) { if(n!=0) return n+f2(n-1); return 0; }
int f3(int n) { if(n==0) return 0; if(n%2==1) return n+f3(n-1); return n*n/4+2*f3(n/2); }
Pentru n=24, se obține aceeași valoare la apelul subprogramelor:
f1 și f2
f1 și f3
f2 și f3
a. f1, f2 și f3
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Subprogramul f este definit alăturat. Indicați valoarea f(3,2).
int f(int x, int y) { int z; if (y==0) return 1; z=f(x,y/2); if (y%2!=0) return z*z*x; return z*z; }
1
2
9
18
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Subprogramul f este definit alăturat. Indicați valoarea lui f(2023).
int f(int n) { if(n==0) return 0; if(n%10==2) return f(n/10)*10+3; return f(n/10)*10+2; }
3232
2303
3332
5355
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Subprogramul f este definit alăturat. Indicați valoarea f(35,3).
int f(int n,int k) { if(n==0 || k==0) return 0; return n%k+10*f(n/k,k); }
33
355
102
1022
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Subprogramul f este definit alăturat. Indicați un apel în urma căruia în șirul afișat există două valori egale cu 23.
void f(int m, int n) { cout<<(m+n)/2><<' '; if(m<=n) f(m+1,n-2); }
f(20,23);
f(20,26);
f(21,25);
f(21,27);
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Subprogramul f este definit alăturat. Indicați valoarea parametrului x pentru care f(x,3) are valoarea 2022. int f(int n,int p) { if(n==0) return 0; else if(p==0) return n*10+2; else return f(n/10,p-1); }
120234
122023
220223
202345
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Subprogramul f este definit alăturat.
int f(int st,int dr,int v[]) { if(st==dr) if(v[st]==st)return 1; else return 0; else return f(st,(st+dr)/2,v) + f(1+(st+dr)/2,dr,v); }
Știind că variabila x memorează un tablou unidimensional cu elementele (7,1,2,5,4), în această ordine, numerotate de la 0 la 4, indicați valoarea f(0,4,x).
2
3
4
5
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