feat: Initial commit

Laboratorio 3/Esercizio 1/main.c

@@ -0,0 +1,56 @@
+// Laboratorio 3 - Esercizio 1
+// Matteo Schiff - s295565
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int majority(int * a, int N) {
+    if (N == 1) {
+        return a[0];
+    }
+
+    int m = N/2;
+
+    int x = majority(a, m);
+    int y = majority(a+m, m);
+
+    if (x == y)
+        return x;
+
+    if (x != -1) {
+        int c = 0;
+        for (int i = 0; i < N; i++) {
+            if (a[i] == x)
+                c++;
+        }
+        if (c > (N/2))
+            return x;
+    }
+
+    if (y != -1) {
+        int c = 0;
+        for (int i = 0; i < N; i++) {
+            if (a[i] == y)
+                c++;
+        }
+
+        if (c > (N/2))
+            return y;
+    }
+
+    return -1;
+}
+
+int main(int argc, char ** argv) {
+    int N = argc - 1;
+
+    if (argc < 2)
+        return 1;
+
+    int * vec = malloc(N * sizeof(int));
+    for (int i = 0; i < N; i++) {
+        vec[i] = atoi(argv[i+1]);
+    }
+
+    printf("major: %d\n", majority(vec, N));
+}