new file: AT_arc073_b.cpp

AT_arc073_b.cpp

@@ -0,0 +1,49 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef pair<int, int> pii;
+int n; // 100
+int w; // 1e9
+pair<int, int> obj[105];
+int dp[105][105][305];
+int w1;
+int main()
+{
+    // freopen("satchel.in", "r", stdin);
+    // freopen("satchel.out", "w", stdout);
+    scanf("%d%d", &n, &w);
+    for (int i = 1; i <= n; ++i)
+    {
+        scanf("%d%d", &obj[i].first, &obj[i].second);
+        if (i == 1)
+            w1 = obj[1].first;
+        obj[i].first -= w1;
+    }
+    int maxS = 3 * n;
+    memset(dp, -1, sizeof(dp));
+    dp[0][0][0] = 0;
+    for (int i = 1; i <= n; ++i)
+    {
+        int d = obj[i].first;
+        int v = obj[i].second;
+        for (int k = 0; k <= i; ++k)
+        {
+            for (int s = 0; s <= maxS; ++s)
+            {
+                dp[i][k][s] = dp[i - 1][k][s];
+                if (k >= 1 && s >= d && dp[i - 1][k - 1][s - d] != -1)
+                    dp[i][k][s] = max(dp[i][k][s], dp[i - 1][k - 1][s - d] + v);
+            }
+        }
+    }
+    int ans = 0;
+    for (int k = 0; k <= n; ++k)
+        for (int s = 0; s <= maxS; ++s)
+        {
+            if (dp[n][k][s] == -1)
+                continue;
+            if (1LL * k * w1 + s <= w)
+                ans = max(ans, dp[n][k][s]);
+        }
+    printf("%d\n", ans);
+    return 0;
+}