代码

#define __SANITIZE_ADDRESS__ 0
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")auto _ = []() {ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);return nullptr;
}();

使用例子

#define __SANITIZE_ADDRESS__ 0
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")auto _ = []() {ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);return nullptr;
}();class Solution {
public:vector<int> getAverages(vector<int>& nums, int k) {int n = nums.size();vector<int> ans(n, -1);long long sum = 0;for (int i = 0; i < min(n, k << 1); i++) {sum += nums[i];}for (int i = k; i + k < n; i++) {sum += nums[i + k];ans[i] = sum / (2 * k + 1);sum -= nums[i - k];}return ans;}
};