假设你是球队的经理。对于即将到来的锦标赛,你想组合一支总体得分最高的球队。球队的得分是球队中所有球员的分数 总和 。
然而,球队中的矛盾会限制球员的发挥,所以必须选出一支 没有矛盾 的球队。如果一名年龄较小球员的分数 严格大于 一名年龄较大的球员,则存在矛盾。同龄球员之间不会发生矛盾。
给你两个列表 scores
和 ages
,其中每组 scores[i]
和 ages[i]
表示第 i
名球员的分数和年龄。请你返回 所有可能的无矛盾球队中得分最高那支的分数 。
示例 1:
输入:scores = [1,3,5,10,15], ages = [1,2,3,4,5] 输出:34 解释:你可以选中所有球员。
示例 2:
输入:scores = [4,5,6,5], ages = [2,1,2,1] 输出:16 解释:最佳的选择是后 3 名球员。注意,你可以选中多个同龄球员。
示例 3:
输入:scores = [1,2,3,5], ages = [8,9,10,1] 输出:6 解释:最佳的选择是前 3 名球员。
提示:
1 <= scores.length, ages.length <= 1000
scores.length == ages.length
1 <= scores[i] <= 106
1 <= ages[i] <= 1000
我们可以将球员按照分数从小到大排序,如果分数相同,则按照年龄从小到大排序。
接下来,使用动态规划求解。
我们定义
对于
最后,我们返回
时间复杂度
class Solution:
def bestTeamScore(self, scores: List[int], ages: List[int]) -> int:
arr = sorted(zip(scores, ages))
n = len(arr)
f = [0] * n
for i, (score, age) in enumerate(arr):
for j in range(i):
if age >= arr[j][1]:
f[i] = max(f[i], f[j])
f[i] += score
return max(f)
class Solution {
public int bestTeamScore(int[] scores, int[] ages) {
int n = ages.length;
int[][] arr = new int[n][2];
for (int i = 0; i < n; ++i) {
arr[i] = new int[] {scores[i], ages[i]};
}
Arrays.sort(arr, (a, b) -> a[0] == b[0] ? a[1] - b[1] : a[0] - b[0]);
int[] f = new int[n];
int ans = 0;
for (int i = 0; i < n; ++i) {
for (int j = 0; j < i; ++j) {
if (arr[i][1] >= arr[j][1]) {
f[i] = Math.max(f[i], f[j]);
}
}
f[i] += arr[i][0];
ans = Math.max(ans, f[i]);
}
return ans;
}
}
class Solution {
public:
int bestTeamScore(vector<int>& scores, vector<int>& ages) {
int n = ages.size();
vector<pair<int, int>> arr(n);
for (int i = 0; i < n; ++i) {
arr[i] = {scores[i], ages[i]};
}
sort(arr.begin(), arr.end());
vector<int> f(n);
for (int i = 0; i < n; ++i) {
for (int j = 0; j < i; ++j) {
if (arr[i].second >= arr[j].second) {
f[i] = max(f[i], f[j]);
}
}
f[i] += arr[i].first;
}
return *max_element(f.begin(), f.end());
}
};
func bestTeamScore(scores []int, ages []int) int {
n := len(ages)
arr := make([][2]int, n)
for i := range ages {
arr[i] = [2]int{scores[i], ages[i]}
}
sort.Slice(arr, func(i, j int) bool {
a, b := arr[i], arr[j]
return a[0] < b[0] || a[0] == b[0] && a[1] < b[1]
})
f := make([]int, n)
for i := range arr {
for j := 0; j < i; j++ {
if arr[i][1] >= arr[j][1] {
f[i] = max(f[i], f[j])
}
}
f[i] += arr[i][0]
}
return slices.Max(f)
}
function bestTeamScore(scores: number[], ages: number[]): number {
const arr = ages.map((age, i) => [age, scores[i]]);
arr.sort((a, b) => (a[0] == b[0] ? a[1] - b[1] : a[0] - b[0]));
const n = arr.length;
const f = new Array(n).fill(0);
for (let i = 0; i < n; ++i) {
for (let j = 0; j < i; ++j) {
if (arr[i][1] >= arr[j][1]) {
f[i] = Math.max(f[i], f[j]);
}
}
f[i] += arr[i][1];
}
return Math.max(...f);
}
/**
* @param {number[]} scores
* @param {number[]} ages
* @return {number}
*/
var bestTeamScore = function (scores, ages) {
const arr = ages.map((age, i) => [age, scores[i]]);
arr.sort((a, b) => (a[0] == b[0] ? a[1] - b[1] : a[0] - b[0]));
const n = arr.length;
const f = new Array(n).fill(0);
for (let i = 0; i < n; ++i) {
for (let j = 0; j < i; ++j) {
if (arr[i][1] >= arr[j][1]) {
f[i] = Math.max(f[i], f[j]);
}
}
f[i] += arr[i][1];
}
return Math.max(...f);
};
与方法一类似,我们可以将球员按照分数从小到大排序,如果分数相同,则按照年龄从小到大排序。
接下来,我们使用树状数组维护不超过当前球员年龄的球员的最大得分。每一次,我们只需要在
最后,我们返回得分的最大值即可。
时间复杂度
class BinaryIndexedTree:
def __init__(self, n):
self.n = n
self.c = [0] * (n + 1)
def update(self, x, val):
while x <= self.n:
self.c[x] = max(self.c[x], val)
x += x & -x
def query(self, x):
s = 0
while x:
s = max(s, self.c[x])
x -= x & -x
return s
class Solution:
def bestTeamScore(self, scores: List[int], ages: List[int]) -> int:
m = max(ages)
tree = BinaryIndexedTree(m)
for score, age in sorted(zip(scores, ages)):
tree.update(age, score + tree.query(age))
return tree.query(m)
class BinaryIndexedTree {
private int n;
private int[] c;
public BinaryIndexedTree(int n) {
this.n = n;
c = new int[n + 1];
}
public void update(int x, int val) {
while (x <= n) {
c[x] = Math.max(c[x], val);
x += x & -x;
}
}
public int query(int x) {
int s = 0;
while (x > 0) {
s = Math.max(s, c[x]);
x -= x & -x;
}
return s;
}
}
class Solution {
public int bestTeamScore(int[] scores, int[] ages) {
int n = ages.length;
int[][] arr = new int[n][2];
for (int i = 0; i < n; ++i) {
arr[i] = new int[] {scores[i], ages[i]};
}
Arrays.sort(arr, (a, b) -> a[0] == b[0] ? a[1] - b[1] : a[0] - b[0]);
int m = 0;
for (int age : ages) {
m = Math.max(m, age);
}
BinaryIndexedTree tree = new BinaryIndexedTree(m);
for (int[] x : arr) {
tree.update(x[1], x[0] + tree.query(x[1]));
}
return tree.query(m);
}
}
class BinaryIndexedTree {
public:
BinaryIndexedTree(int _n)
: n(_n)
, c(_n + 1) {}
void update(int x, int val) {
while (x <= n) {
c[x] = max(c[x], val);
x += x & -x;
}
}
int query(int x) {
int s = 0;
while (x) {
s = max(s, c[x]);
x -= x & -x;
}
return s;
}
private:
int n;
vector<int> c;
};
class Solution {
public:
int bestTeamScore(vector<int>& scores, vector<int>& ages) {
int n = ages.size();
vector<pair<int, int>> arr(n);
for (int i = 0; i < n; ++i) {
arr[i] = {scores[i], ages[i]};
}
sort(arr.begin(), arr.end());
int m = *max_element(ages.begin(), ages.end());
BinaryIndexedTree tree(m);
for (auto& [score, age] : arr) {
tree.update(age, score + tree.query(age));
}
return tree.query(m);
}
};
type BinaryIndexedTree struct {
n int
c []int
}
func newBinaryIndexedTree(n int) *BinaryIndexedTree {
c := make([]int, n+1)
return &BinaryIndexedTree{n, c}
}
func (this *BinaryIndexedTree) update(x, val int) {
for x <= this.n {
this.c[x] = max(this.c[x], val)
x += x & -x
}
}
func (this *BinaryIndexedTree) query(x int) int {
s := 0
for x > 0 {
s = max(s, this.c[x])
x -= x & -x
}
return s
}
func bestTeamScore(scores []int, ages []int) int {
n := len(ages)
arr := make([][2]int, n)
m := 0
for i, age := range ages {
m = max(m, age)
arr[i] = [2]int{scores[i], age}
}
sort.Slice(arr, func(i, j int) bool {
a, b := arr[i], arr[j]
return a[0] < b[0] || a[0] == b[0] && a[1] < b[1]
})
tree := newBinaryIndexedTree(m)
for _, x := range arr {
tree.update(x[1], x[0]+tree.query(x[1]))
}
return tree.query(m)
}