2 files changed, 6 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 1e63a53..fd5de3e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC      = gcc
-CFLAGS  = -Wall -W -Wextra -std=c99 -g
+CFLAGS  = -Wall -W -Wextra -std=c99 -O3
 NAME    = solver
 
 $(NAME): .solver.o .main.o
diff --git a/solver.c b/solver.c
index c0da05f..334848e 100644
--- a/solver.c
+++ b/solver.c
@@ -3,6 +3,7 @@
 #include <malloc.h>
 #include <limits.h>
 #include <stdint.h>
+#include <assert.h>
 #include "solver.h"
 
 #define _log(...)   fprintf(stderr, __VA_ARGS__)
@@ -39,6 +40,7 @@ static void display_solution(void)
 {
     puts("--------------------------");
     puts("found a (better) solution:");
+
     for (int i = 5; i >= solution_g.level; i--) {
 	char op;
 	int _result;
@@ -60,6 +62,9 @@ static void display_solution(void)
 		op = '/';
 		_result = solution_g.computation[i].v1 / solution_g.computation[i].v2;
 		break;
+	    default:
+		assert (0);
+		break;
 	}
 
 	printf("%d %c %d = %d\n", solution_g.computation[i].v1