add alternative answer for 1-soldiers

pset6/1-soldiers-table.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main(void) {
+  int table[] = {461, 2771, 5081, 7391, 9701, 12011};
+  int n;
+  scanf("%i", &n);
+
+  for (int i = 0; i < sizeof(table) / sizeof(table[0]); i++) {
+		if (table[i] >= n) {
+			printf("%i\n",table[i]);
+			break;
+		}
+  }
+  return 0;
+}