@[tuliwei](/user/35090) 你数据小的时候用快读?比cin还慢,自己上图灵姬做做题目吧,提高升学考试
by 闪电皮卡丘 @ 2020-05-24 09:19:00
@[闪电皮卡丘](/user/224112) 你加了fread吗
by tuliwei @ 2020-05-24 09:28:37
@[tuliwei](/user/35090) 这。。。
by 闪电皮卡丘 @ 2020-05-24 09:30:28
数据小推荐这个:
```cpp
struct { inline operator int () { int x;return scanf("%d", &x), x; } } read;
```
by tuliwei @ 2020-05-24 09:34:58
稍微试验一下,debug下面会超,release不会
0到intmax的数据生成:
```cpp
std::mt19937_64 engine(std::random_device{}());
std::uniform_int_distribution dis(0, std::numeric_limits<int>::max());
int main()
{
std::freopen("out.txt", "w", stdout);
for(std::size_t i = 0; i < static_cast<std::size_t>(1E6); ++i)
std::cout << dis(engine) << std:: endl;
}
```
```cpp
#include <cstdio>
#include <array>
#include <chrono>
#include <iostream>
#include <random>
#include <limits>
std::array<int, static_cast<std::size_t>(1E6)> arr;
int main()
{
std::freopen("out.txt", "r", stdin);
auto t0 = std::chrono::high_resolution_clock::now();
for(auto& i : arr)
{
std::scanf("%d", &i);
}
auto t1 = std::chrono::high_resolution_clock::now();
std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(t1 - t0).count();
}
```
输出:
```
Debug : 1265
Release : 241
```
by constructor @ 2020-05-24 09:38:33