[OPT] TP 5

This commit is contained in:
Suwako Moriya 2020-12-02 22:40:55 +01:00
parent 2ceee1fa2c
commit 81f23fb737
Signed by: SuwakoMmh
GPG Key ID: A27482B806F13CD5
13 changed files with 427 additions and 10 deletions

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S'il y a reconstruction, dans le pire des cas, cette reconstruction s'effectue sur l'arbre entier en $O(n)$ puis puisque la reconstruction crée un arbre dont tous les noeuds sont équilibrés, il n'y aura donc pas d'autre reconstruction. Ainsi en notant $C_h$ la complexité d'un appel entrainant une reconstruction, on a : $$C_h = O(n) + c_h = O(n) + O(lg(n)) = O(n)$$
CQFD (ça va, c'est pas si pénible que ça les maths (de ce niveau là en tout cas))
\end{enumerate}
\end{document}

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\documentclass[a4paper,10pt]{article}
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\title{Questions du TP 5}
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\begin{document}
\maketitle
\section{Graphes définis par listes d'adjacences}
\begin{enumerate}
\item Si le graphe n'est est orienté, au lieu d'ajouter \textbf{j} à \textbf{g.(i)} et \textbf{i} à \textbf{g.(j)}, on se contente d'ajouter j à g.(i).
\item De même, au lieu de retirer \textbf{j} de \textbf{g.(i)} et \textbf{i} de \textbf{g.(j)}, on se contente de retirer \textbf{j} de \textbf{g.(i)}.
\item Ici on a \textbf{ajoute\_sommet : int $\rightarrow$ int $\rightarrow$ graphe1 $\rightarrow$ graphe1}, or l'appel d'exemple est \textbf{ajoute\_sommet g}. On supposera que \textbf{ajoute\_sommet} est du type : \textbf{graphe1 $\rightarrow$ graphe1}.
\end{enumerate}
\end{document}

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type graphel = int list array;;
let ajoute_arete i j (g:graphel) =
let rec ajoute k l = match l with
| [] -> [k]
| h::t when h=k -> h::(ajoute k t)
| h::t -> l in
g.(i) <- ajoute j g.(i);
g.(j) <- ajoute i g.(j);;
let supprime_arete i j (g:graphel) =
let rec retire k l = match l with
| h::t when h=k -> t
| h::t -> h::(retire k t)
| _ -> l in
g.(i) <- retire j g.(i);
g.(j) <- retire i g.(j);;
let ajoute_sommet (g:graphel) =
let n = Array.length g in
let g2 = Array.make (n+1) [] in
for i = 0 to n-1 do
g2.(i) <- g.(i)
done;
g2;;
let supprime_sommet i (g:graphel) =
let n = Array.length g in
let g2 = Array.make (n-1) [] in
let rec parcours l = match l with
| [] -> []
| h::t when h=i -> parcours t
| h::t when h<i -> h::(parcours t)
| h::t when h>i -> (h-1)::(parcours t) in
for j = 0 to n-2 do
if j < i then
g2.(j) <- parcours g.(j)
else
g2.(j) <- parcours g.(j+1)
done;
g2;;
type graphem = int array array;;
let ajoute_aretem i j (g:graphem) =
g.(i).(j) <- 1;
g.(j).(i) <- 1;;
let supprime_aretem i j (g:graphem) =
g.(i).(j) <- 0;
g.(j).(i) <- 0;;
let ajoute_sommetm (g:graphem) =
let n = Array.length g in
let g2 = Array.make_matrix n n 0 in
for i = 0 to n-1 do
for j = 0 to n-1 do
g2.(i).(j) <- g.(i).(j)
done
done;
g2;;
let supprime_sommetm k (g:graphem) =
let n = Array.length g in
let g2 = Array.make_matrix (n-1) (n-1) 0 in
for i = 0 to n-2 do
for j = 0 to n-2 do
let a = if i < k then i else i+1 in
let b = if j < k then j else j+1 in
g2.(i).(j) <- g.(a).(b)
done
done;
g2;;
let conversion_lm (g:graphel) =
let n = Array.length g in
let g2 = Array.make_matrix n n 0 in
for i = 0 to n-1 do
let ajoute j = ajoute_aretem i j g2 in
List.map ajoute g.(i)
done;
g2;;
let conversion_ml (g:graphem) =
let n = Array.length g in
let g2 = Array.make n [] in
for i = 0 to n-1 do
for j = 0 to n-1 do
if g.(i).(j) = 1 then
ajoute_arete i j g2
else ()
done
done;
g2;;

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