Add sequential

data/pattern.txt

@@ -1 +1 @@
-mamma
+stella

data/text.txt

@@ -1 +1,2 @@
-testo di esempio mamma altra mamma esempio prova mammamma esempio mamma
+testo di esem
+pio mamma altra mamma esempio prova mammamma esempio mamma

sequential.c

@@ -0,0 +1,24 @@
+#include "util.h"
+#include "kmp.h"
+#include <stdio.h>
+#include <papi.h>
+
+int main() {
+    int text_len, pattern_len;
+
+    char *text = read_file("data/dante.txt", &text_len);
+    char *pattern = read_file("data/pattern.txt", &pattern_len);
+
+    int lps[pattern_len];
+    create_lps(pattern, pattern_len, lps);
+
+    int match_number = 0;
+    int residue = 0;
+
+    long_long start_time = PAPI_get_real_usec();
+    int *matches = search_pattern(text, pattern, lps, &match_number, &residue);
+    long_long end_time = PAPI_get_real_usec();
+
+    printf("found %d matches\n", match_number);
+    printf("elapsed: %d\n", end_time - start_time);
+}