Fix Añadido Ejercicio 8 B4

src/content/docs/prouno/boletines/B4-Boletin-4.mdx

@@ -317,6 +317,43 @@ El número 9 no aparece en el array.
 <details>
 <summary>Mostrar Solución</summary>
 ```c title="Ejercicio_08.c"
+// SPDX-FileCopyrightText: 2024 Sprinter05
+//
+// SPDX-License-Identifier: GPL-3.0-only
+
+// Libraries
+#include <stdio.h>
+#define N 10
+
+int main(){
+    // Define variables and ask for parameters
+    int nums[N], guess, lGuess, uGuess;
+    printf("\nInput an array of 10 elements by pressing Enter after each element: ");
+    for(int i=0; i<10; i++){
+        scanf("%d", &nums[i]);
+    }
+    // Input guess
+    printf("\nWhat number do you want to find?: ");
+    scanf("%d", &guess);
+    // Lower bound
+    for(int i=0; i<N; i++){
+        if(nums[i] == guess){
+            lGuess = i;
+            break;
+        }
+    }
+    // Upper bound
+    for(int i=N; i>=0; i--){
+        if(nums[i] == guess){
+            uGuess = i;
+            break;
+        }
+    }
+    // Print solutions
+    printf("\nLower bound solution: %d", lGuess);
+    printf("\nUpper bound solution: %d", uGuess);
+    printf("\n");
+}
 ```
 </details>