class Solution {
public:
vector<bool> canEat(vector<int>& candiesCount, vector<vector<int>>& queries) {
}
};
1744. 你能在你最喜欢的那天吃到你最喜欢的糖果吗?
给你一个下标从 0 开始的正整数数组 candiesCount
,其中 candiesCount[i]
表示你拥有的第 i
类糖果的数目。同时给你一个二维数组 queries
,其中 queries[i] = [favoriteTypei, favoriteDayi, dailyCapi]
。
你按照如下规则进行一场游戏:
0
天开始吃糖果。i - 1
类糖果之前,不能 吃任何一颗第 i
类糖果。请你构建一个布尔型数组 answer
,用以给出 queries
中每一项的对应答案。此数组满足:
answer.length == queries.length
。answer[i]
是 queries[i]
的答案。answer[i]
为 true
的条件是:在每天吃 不超过 dailyCapi
颗糖果的前提下,你可以在第 favoriteDayi
天吃到第 favoriteTypei
类糖果;否则 answer[i]
为 false
。注意,只要满足上面 3 条规则中的第二条规则,你就可以在同一天吃不同类型的糖果。
请你返回得到的数组 answer
。
示例 1:
输入:candiesCount = [7,4,5,3,8], queries = [[0,2,2],[4,2,4],[2,13,1000000000]] 输出:[true,false,true] 提示: 1- 在第 0 天吃 2 颗糖果(类型 0),第 1 天吃 2 颗糖果(类型 0),第 2 天你可以吃到类型 0 的糖果。 2- 每天你最多吃 4 颗糖果。即使第 0 天吃 4 颗糖果(类型 0),第 1 天吃 4 颗糖果(类型 0 和类型 1),你也没办法在第 2 天吃到类型 4 的糖果。换言之,你没法在每天吃 4 颗糖果的限制下在第 2 天吃到第 4 类糖果。 3- 如果你每天吃 1 颗糖果,你可以在第 13 天吃到类型 2 的糖果。
示例 2:
输入:candiesCount = [5,2,6,4,1], queries = [[3,1,2],[4,10,3],[3,10,100],[4,100,30],[1,3,1]] 输出:[false,true,true,false,false]
提示:
1 <= candiesCount.length <= 105
1 <= candiesCount[i] <= 105
1 <= queries.length <= 105
queries[i].length == 3
0 <= favoriteTypei < candiesCount.length
0 <= favoriteDayi <= 109
1 <= dailyCapi <= 109
原站题解
javascript 解法, 执行用时: 176 ms, 内存消耗: 79.4 MB, 提交时间: 2023-09-06 23:50:03
/** * @param {number[]} candiesCount * @param {number[][]} queries * @return {boolean[]} */ var canEat = function(candiesCount, queries) { const n = candiesCount.length; // 前缀和 const sum = new Array(n).fill(0); sum[0] = candiesCount[0]; for (let i = 1; i < n; ++i) { sum[i] = sum[i - 1] + candiesCount[i]; } const q = queries.length; const ans = new Array(q).fill(0); for (let i = 0; i < q; ++i) { const query = queries[i]; const favoriteType = query[0], favoriteDay = query[1], dailyCap = query[2]; const x1 = favoriteDay + 1; const y1 = (favoriteDay + 1) * dailyCap; const x2 = favoriteType == 0 ? 1 : sum[favoriteType - 1] + 1; const y2 = sum[favoriteType]; ans[i] = !(x1 > y2 || y1 < x2); } return ans; };
golang 解法, 执行用时: 188 ms, 内存消耗: 23.6 MB, 提交时间: 2023-09-06 23:49:40
func canEat(candiesCount []int, queries [][]int) []bool { n := len(candiesCount) // 前缀和 sum := make([]int, n) sum[0] = candiesCount[0] for i := 1; i < n; i++ { sum[i] = sum[i-1] + candiesCount[i] } ans := make([]bool, len(queries)) for i, q := range queries { favoriteType, favoriteDay, dailyCap := q[0], q[1], q[2] x1 := favoriteDay + 1 y1 := (favoriteDay + 1) * dailyCap x2 := 1 if favoriteType > 0 { x2 = sum[favoriteType-1] + 1 } y2 := sum[favoriteType] ans[i] = !(x1 > y2 || y1 < x2) } return ans }
python3 解法, 执行用时: 156 ms, 内存消耗: 64.7 MB, 提交时间: 2023-09-06 23:49:26
class Solution: def canEat(self, candiesCount: List[int], queries: List[List[int]]) -> List[bool]: # 前缀和 total = list(accumulate(candiesCount)) ans = list() for favoriteType, favoriteDay, dailyCap in queries: x1 = favoriteDay + 1 y1 = (favoriteDay + 1) * dailyCap x2 = 1 if favoriteType == 0 else total[favoriteType - 1] + 1 y2 = total[favoriteType] ans.append(not(x1 > y2 or y1 < x2)) return ans
java 解法, 执行用时: 6 ms, 内存消耗: 88.4 MB, 提交时间: 2023-09-06 23:49:13
class Solution { public boolean[] canEat(int[] candiesCount, int[][] queries) { int n = candiesCount.length; // 前缀和 long[] sum = new long[n]; sum[0] = candiesCount[0]; for (int i = 1; i < n; ++i) { sum[i] = sum[i - 1] + candiesCount[i]; } int q = queries.length; boolean[] ans = new boolean[q]; for (int i = 0; i < q; ++i) { int[] query = queries[i]; int favoriteType = query[0], favoriteDay = query[1], dailyCap = query[2]; long x1 = favoriteDay + 1; long y1 = (long) (favoriteDay + 1) * dailyCap; long x2 = favoriteType == 0 ? 1 : sum[favoriteType - 1] + 1; long y2 = sum[favoriteType]; ans[i] = !(x1 > y2 || y1 < x2); } return ans; } }
cpp 解法, 执行用时: 404 ms, 内存消耗: 118.1 MB, 提交时间: 2023-09-06 23:49:01
class Solution { private: using LL = long long; public: vector<bool> canEat(vector<int>& candiesCount, vector<vector<int>>& queries) { int n = candiesCount.size(); // 前缀和 vector<LL> sum(n); sum[0] = candiesCount[0]; for (int i = 1; i < n; ++i) { sum[i] = sum[i - 1] + candiesCount[i]; } vector<bool> ans; for (const auto& q: queries) { int favoriteType = q[0], favoriteDay = q[1], dailyCap = q[2]; LL x1 = favoriteDay + 1; LL y1 = (LL)(favoriteDay + 1) * dailyCap; LL x2 = (favoriteType == 0 ? 1 : sum[favoriteType - 1] + 1); LL y2 = sum[favoriteType]; ans.push_back(!(x1 > y2 || y1 < x2)); } return ans; } };