281. 硬币

https://www.acwing.com/problem/content/submission/code_detail/13036725/

AcWing/281/281.cpp

@@ -0,0 +1,42 @@
+#include <cstring>
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 105,
+          M = 1e6 + 5;
+
+int n, m, v[N], s[N], g[M];
+bool f[M];
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    while (cin >> n >> m, n || m) {
+        for (int i = 1; i <= n; i++) {
+            cin >> v[i];
+        }
+        for (int i = 1; i <= n; i++) {
+            cin >> s[i];
+        }
+
+        memset(f, 0x00, sizeof(f));
+        f[0] = 1;
+        for (int i = 1; i <= n; i++) {
+            memset(g, 0x00, sizeof(g));
+            for (int j = v[i]; j <= m; j++) {
+                if (!f[j] && f[j - v[i]] && g[j - v[i]] < s[i]) {
+                    f[j] = true;
+                    g[j] = g[j - v[i]] + 1;
+                }
+            }
+        }
+
+        int ans = 0;
+        for (int i = 1; i <= m; i++) ans += f[i];
+        cout << ans << endl;
+    }
+    return 0;
+}