diff --git a/code/p2e1.c b/code/p2e1.c
new file mode 100644
index 0000000..34fff33
--- /dev/null
+++ b/code/p2e1.c
@@ -0,0 +1,154 @@
+/**
+ * SAE 2.02 - Exploration algorithmique d’un problème
+ * Prtie 2 / Exercice 1
+ * Extrait code C
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+/// - ALGO 1 -----------------------------------------------
+
+void echanger(int tab[], int i, int j) {
+    int tmp;
+    tmp = tab[i];
+    tab[i] = tab[j];
+    tab[j] = tmp;
+}
+
+void algo1(int tab [], int nb) {
+    int echange = 1;
+    int i;
+    int deb = 0, fin = nb-1;
+    while (echange > 0) {
+        echange = 0;
+        for(i = deb; i < fin; i++) {
+            if(tab[i] > tab[i+1]) {
+                echanger(tab, i, i+1);
+                echange++;
+            }
+        }
+        fin--;
+        for(i = fin; i > deb; i--) {
+            if(tab[i] < tab[i-1]) {
+                echanger(tab, i, i-1);
+                echange++;
+            }
+        }
+        deb++;
+    }
+}
+
+
+/// - ALGO 2 -----------------------------------------------
+
+void algo2(int tab[], int nb) {
+    int* cpt;
+    int min = tab[0], max = tab[0];
+    int i, j;
+    for(i = 1; i < nb; i++) {
+        if(min > tab[i]) min = tab[i];
+        if(max < tab[i]) max = tab[i];
+    }
+    cpt = (int *) calloc((max-min+1), sizeof(int));
+    if(cpt == NULL) {
+        printf("pb aloc mémoire \n");
+        exit(1);
+    }
+    for(i = 0; i < nb; i++) {
+        cpt[tab[i]-min]++;
+    }
+    j = 0;
+    for(i = 0; i < max-min+1; i++) {
+        while (cpt[i] != 0) {
+            tab[j] = i + min;
+            j++;
+            cpt[i]--;
+        }
+    }
+    free(cpt);
+}
+
+
+/// - ALGO 3 -----------------------------------------------
+
+int recherchePos(int tab[], int n, int val) {
+    int i;
+    for(i = 0; i < n; i++) {
+        if(val < tab[i]) {
+            return i;
+        }
+    }
+    return i;
+}
+
+void algo3(int tab[], int n) {
+    int i, pos, j, tmp;
+    for(i = 1; i < n; i++) {
+        pos = recherchePos(tab, i, tab[i]);
+        if(pos != i){
+            tmp = tab[i];
+            for(j = i; j > pos; j--) {
+                tab[j] = tab[j-1];
+            }
+            tab[pos] = tmp;
+        }
+    }
+}
+
+
+/// - MAIN --------------------------------------------------
+
+void prtab(int tab[], int n) {
+    for (int i = 0; i < n; i++)
+        printf("%d ", tab[i]);
+}
+
+void tstalgo(char *title, void (*algo)(int[], int), int tab[], int n) {
+
+    double time_spent = 0.0;
+    clock_t begin = clock();
+
+    (*algo)(tab, n);
+
+    clock_t end = clock();
+    time_spent += (double)(end - begin) / CLOCKS_PER_SEC;
+
+    printf("(%f) ", time_spent);
+    printf("%s: ", title);
+    prtab(tab, n);
+    printf("\n");
+}
+
+int main(void) {
+
+#define TABLEN 6
+    int tab1[] = {13, 22, 1, 4, 9, 10};
+    int tab2[] = {1, 2, 4, 6, 9, 10};
+    int tab3[] = {111, 24, 4, 4, 2, 1};
+
+    printf("\n[ TEST ALGO 1 ]:\n");
+    {   // test algo 1
+        int *t1 = tab1, *t2 = tab2, *t3 = tab3;
+        tstalgo("al1t1", algo1, t1, TABLEN);
+        tstalgo("al1t2", algo1, t2, TABLEN);
+        tstalgo("al1t3", algo1, t3, TABLEN);
+    }
+
+    printf("\n\n[ TEST ALGO 2 ]:\n");
+    {   // test algo 2
+        int *t1 = tab1, *t2 = tab2, *t3 = tab3;
+        tstalgo("al2t1", algo2, t1, TABLEN);
+        tstalgo("al2t2", algo2, t2, TABLEN);
+        tstalgo("al2t3", algo2, t3, TABLEN);
+    }
+
+    printf("\n\n[ TEST ALGO 3 ]:\n");
+    {   // test algo 3
+        int *t1 = tab1, *t2 = tab2, *t3 = tab3;
+        tstalgo("al3t1", algo3, t1, TABLEN);
+        tstalgo("al3t2", algo3, t2, TABLEN);
+        tstalgo("al3t3", algo3, t3, TABLEN);
+    }
+}
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diff --git a/code/p2tests b/code/p2tests
new file mode 100755
index 0000000..787f66f
Binary files /dev/null and b/code/p2tests differ
diff --git a/main.pdf b/main.pdf
index b5dde0d..e487de6 100644
Binary files a/main.pdf and b/main.pdf differ
diff --git a/sections/partie2.tex b/sections/partie2.tex
index be5b14a..99f09fc 100644
--- a/sections/partie2.tex
+++ b/sections/partie2.tex
@@ -10,6 +10,13 @@
   \subsection{Question 1}
     \par\quad 
 
+  \subsection{Question 2}
+    \par\quad 
+
+  \subsection{Question 3}
+    \par\quad 
 
+  \subsection{Question 4}
+    \par\quad 
     
 \end{document}
\ No newline at end of file