diff --git a/solutions/c/knapsack/1/knapsack.c b/solutions/c/knapsack/1/knapsack.c
new file mode 100644
index 0000000..cccea3c
--- /dev/null
+++ b/solutions/c/knapsack/1/knapsack.c
@@ -0,0 +1,34 @@
+#include "knapsack.h"
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+// typedef struct {
+//    unsigned int weight;
+//    unsigned int value;
+// } item_t;
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+unsigned int maximum_value(unsigned int max_weight, item_t *items, size_t item_count) {
+    if (item_count == 0 || max_weight == 0) {
+        return 0;
+    }
+
+    unsigned int *sack = calloc(max_weight + 1, sizeof(*sack));
+    assert(sack);
+
+    for (size_t i = 0; i < item_count; i++) {
+        unsigned int weight = items[i].weight;
+        unsigned int value = items[i].value;
+
+        for (unsigned int w = max_weight; w >= weight; w--) {
+            sack[w] = MAX(sack[w], sack[w - weight] + value);
+        }
+    }
+
+    unsigned int result = sack[max_weight];
+    free(sack);
+    return result;
+}
diff --git a/solutions/c/knapsack/1/knapsack.h b/solutions/c/knapsack/1/knapsack.h
new file mode 100644
index 0000000..aaebe16
--- /dev/null
+++ b/solutions/c/knapsack/1/knapsack.h
@@ -0,0 +1,13 @@
+#ifndef KNAPSACK_H
+#define KNAPSACK_H
+
+#include <stddef.h>
+
+typedef struct {
+   unsigned int weight;
+   unsigned int value;
+} item_t;
+
+unsigned int maximum_value(unsigned int max_weight, item_t *items, size_t item_count);
+
+#endif