用C++的千万不要用cin,cout

统计数字
160302 LV 7 @ 2014-10-28 23:36:00

测试数据 #0: Accepted, time = 0 ms, mem = 1068 KiB, score = 10
测试数据 #1: Accepted, time = 15 ms, mem = 1068 KiB, score = 10
测试数据 #2: Accepted, time = 46 ms, mem = 1060 KiB, score = 10
测试数据 #3: Accepted, time = 109 ms, mem = 1064 KiB, score = 10
测试数据 #4: Accepted, time = 452 ms, mem = 1060 KiB, score = 10
测试数据 #5: Accepted, time = 655 ms, mem = 1064 KiB, score = 10
测试数据 #6: Accepted, time = 468 ms, mem = 1064 KiB, score = 10
测试数据 #7: TimeLimitExceeded, time = 1014 ms, mem = 1064 KiB, score = 0
测试数据 #8: TimeLimitExceeded, time = 1014 ms, mem = 1064 KiB, score = 0
测试数据 #9: Accepted, time = 0 ms, mem = 1064 KiB, score = 10
TimeLimitExceeded, time = 3773 ms, mem = 1068 KiB, score = 80

这就用cin，cout的后果
于是改用printf，scanf

测试数据 #0: Accepted, time = 0 ms, mem = 1308 KiB, score = 10
测试数据 #1: Accepted, time = 0 ms, mem = 1304 KiB, score = 10
测试数据 #2: Accepted, time = 15 ms, mem = 1308 KiB, score = 10
测试数据 #3: Accepted, time = 7 ms, mem = 1308 KiB, score = 10
测试数据 #4: Accepted, time = 31 ms, mem = 1304 KiB, score = 10
测试数据 #5: Accepted, time = 46 ms, mem = 1312 KiB, score = 10
测试数据 #6: Accepted, time = 31 ms, mem = 1304 KiB, score = 10
测试数据 #7: Accepted, time = 93 ms, mem = 1312 KiB, score = 10
测试数据 #8: Accepted, time = 78 ms, mem = 1304 KiB, score = 10
测试数据 #9: Accepted, time = 0 ms, mem = 1304 KiB, score = 10
Accepted, time = 301 ms, mem = 1312 KiB, score = 100

完全无力了

zhuguanxu LV 9 @ 2015-08-02 15:16:53

orz
上帝已死 LV 6 @ 2015-02-13 23:04:59

Linux平台上运行程序普遍比Windows上快。
Windows下VC编译的程序一般运行比MINGW（MINimal Gcc for Windows）快。
VC对cin取消同步与否不敏感，前后效率相同。反过来MINGW则非常敏感，前后效率相差8倍。
read本是linux系统函数，MINGW可能采用了某种模拟方式，read比fread更慢。
Pascal程序运行速度实在令人不敢恭维。
sun_ LV 5 @ 2014-10-31 19:03:33

Orz
wfjcgkw LV 7 @ 2014-10-30 23:25:09

orz
HenryLi LV 8 @ 2014-10-30 13:38:05

#define fin cin
#define fout cout
using namespace std;
void init()
{

}
int main()
{
ios::sync_with_stdio(false);
ifstream fin("culture.in");
ofstream fout("culture.out");

return 0;
}
- Lytning LV 8 @ 2014-10-31 19:11:40
  
  ios::sync_with_stdio(false);对fstream也有用吗
  我怎么感觉只对cin cout有用
xiangshang12 LV 8 @ 2014-10-29 22:23:13

其实我更喜欢用fin，fout----保准你不会超时。。。。。。
来来来，告诉你格式：
ifstream fin("in.in");
ofstream fout("out .out");
fin>>a;
fout<<a;
fin.close();
fout.close();
绝对简单粗暴！！！
BeastLu LV 9 @ 2014-10-29 21:11:22

呃……**偶尔** cin和cout会比scanf和printf快的……真的是偶尔……
AutumnFrost17 LV 6 @ 2014-10-29 05:27:13

没关同步吧
- wind295 LV 8 @ 2014-10-29 23:16:34
  
  noip也不给你关啊
twd2 LV 9 MOD @ 2014-10-29 00:13:45

orz