fixed errors

minimal-app/src/features/counter/counterSlice.js

@@ -3,23 +3,51 @@ import { createSlice } from '@reduxjs/toolkit';
 const counterSlice = createSlice({
   name: 'counter',
   initialState: {
-    value: 0,
+    candies: [],
+    maxCandyWeight: 0,
+    result: {
+      totalTastiness: 0,
+      quantities: [],
+    },
   },
   reducers: {
-    setValue: (counter, action) => {
-      const {
-        value,
-      } = action.payload;
-      counter.value = value;
+    setCandies: (state, action) => {
+      state.candies = action.payload;
     },
+    setMaxWeight: (state, action) => {
+      state.maxWeight = action.payload;
     },
-});
-export default counterSlice;
+    knapsack: (state) => {
+      const { candies, maxWeight } = state;
 
-export const {
-  setValue,
-} = counterSlice.actions;
+      const dp = Array(maxWeight + 1).fill(0);
+      const quantities = Array(maxWeight + 1)
+        .fill(0)
+        .map(() => Array(candies.length).fill(0));
 
-export function selectValue(state) {
-  return state.counter.value;
+      for (let w = 0; w <= maxWeight; w++) {
+        for (let i = 0; i < candies.length; i++) {
+          const { tastiness, weight } = candies[i];
+          if (weight <= w) {
+            const newTastiness = dp[w - weight] + tastiness;
+            if (newTastiness > dp[w]) {
+              dp[w] = newTastiness;
+              quantities[w] = [...quantities[w - weight]];
+              quantities[w][i] += 1;
+            }
           }
+        }
+      }
+
+      state.result.totalTastiness = dp[maxWeight];
+      state.result.quantities = quantities[maxWeight];
+    },
+  },
+});
+export const { setCandies, setMaxWeight, knapsack } = counterSlice.actions;
+
+export const selectCandies = (state) => state.counter.candies;
+export const selectMaxWeight = (state) => state.counter.maxWeight;
+export const selectResult = (state) => state.counter.result;
+
+export default counterSlice.reducer;

minimal-app/src/index.js

@@ -3,7 +3,7 @@ import { createRoot } from 'react-dom/client';
 import { Provider } from 'react-redux';
 import { HashRouter as Router } from 'react-router-dom';
 
-import { store } from './app/store.js';
+import store from './app/store.js';
 import { App } from './app.js';
 
 import './index.css';