update

src/U130967/U130967.cpp

@@ -0,0 +1,46 @@
+#include <algorithm>
+#include <cmath>
+#include <cstdint>
+#include <iostream>
+#include <limits>
+
+using std::cout, std::cin;
+
+using int64 = int64_t;
+const int64 max_nm = 5e3+5;
+int64 n, m, a[max_nm], b[max_nm], hist, dp[max_nm], costs[max_nm][max_nm], inf=std::numeric_limits<int64>::max();
+
+auto mpow(int64 b, int64 e)->int64{
+    if(b==1)return 1;
+    int64 ret{b};
+    for(int64 i{2};i<=e;i++){
+        ret*=b;
+    }
+    return ret;
+}
+
+int main(){
+    cin>>n>>m;
+    std::fill(dp, dp+1+n, inf);
+    dp[0]=0;
+    for(int64 i{1};i<=m;i++){
+        cin>>a[i]>>b[i];
+        costs[i][1] = a[i];
+        for(int64 j{2};j<=n;j++){
+            costs[i][j] = a[i]*mpow(j, b[i]);
+            // cout<<costs[i][j]<<' ';
+        }
+        // cout<<'\n';
+        for(int64 j{n};j>=1;j--){
+            for(int64 x{1};x<=j;x++){
+                if(dp[j-x]!=inf){
+                    dp[j]=std::min(
+                        dp[j],
+                        dp[j-x]+costs[i][x]
+                    );
+                }
+            }
+        }
+    }
+    cout<<dp[n]<<'\n';
+}