Algorithm-Renewed

Algorithm/DP-DynamicProgramming/P2842 纸币问题 1.cpp

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <vector>
+#include <algorithm>
+using namespace std;
+
+int main() {
+    int n, w;
+    cin >> n >> w;
+    vector<int> a(n);
+    for (int i = 0; i < n; i++) cin >> a[i];
+
+    vector<int> dp(w + 1, 1e9);
+    dp[0] = 0;
+
+    for (int j = 0; j < n; j++) {
+        for (int i = a[j]; i <= w; i++) {
+            dp[i] = min(dp[i], dp[i - a[j]] + 1);
+        }
+    }
+
+    if (dp[w] == 1e9) cout << -1 << endl; // <20>޽<EFBFBD>
+    else cout << dp[w] << endl;
+
+    return 0;
+}
+