Random uncommited stuff

1 files changed, 59 insertions, 0 deletions

diff --git a/kattis-open/knapsack/knapsack.c b/kattis-open/knapsack/knapsack.c
new file mode 100644
index 0000000..407b133
--- /dev/null
+++ b/kattis-open/knapsack/knapsack.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+int max(int a, int b) {
+    int v[2] = { a, b };
+    return v[b > a];
+}
+
+int min(int a, int b) {
+    int v[2] = { a, b };
+    return v[b < a];
+}
+
+int ks[2001][2001], v[2000], w[2000];
+bool t[2001][2001];
+int main() {
+    int c, n;
+    while (scanf("%d %d", &c, &n) == 2) {
+        for (int i = 0; i < n; i++) {
+            scanf("%d %d", &v[i], &w[i]);
+        }
+
+        for (int j = 0; j < w[0] && j <= c; j++) {
+            ks[0][j] = 0;
+            t[0][j] = false;
+        }
+        for (int j = w[0]; j <= c; j++) {
+            ks[0][j] = v[0];
+            t[0][j] = true;
+        }
+
+        for (int i = 1; i < n; i++) {
+            for (int j = 0; j < w[i] && j <= c; j++) {
+                ks[i][j] = ks[i - 1][j];
+                t[0][j] = false;
+            }
+            for (int j = w[i]; j <= c; j++) {
+                int skip = ks[i - 1][j];
+                int take = ks[i - 1][j - w[i]] + v[i];
+                ks[i][j] = max(take, skip);
+                t[i][j] = take > skip;
+            }
+        }
+
+        int taken[2000];
+        int taken_count = 0;
+        int j = c;
+        for (int i = n - 1; i >= 0; i--) {
+            if (t[i][j]) {
+                taken[taken_count++] = i;
+                j -= w[i];
+            }
+        }
+        printf("%d\n", taken_count);
+        for (int i = taken_count - 1; i >= 0; i--) {
+            printf("%d%c", taken[i], i == 0 ? '\n' : ' ');
+        }
+    }
+}