@[computerlover](/space/show?uid=28747) 因为scanf比cin快很多
by 1124828077ccj @ 2017-08-05 15:52:25
楼上+1
如果想较快地使用cin/cout 可以在main函数开头添加
ios::sync\_with\_stdio(false); @computerlover
by Tony_Chu_ @ 2017-08-05 16:21:11
@[2016陈常杰](/space/show?uid=14738) 可是我只用了一个cin和一个cout啊，输入数组中的元素都是用scanf的，一个cin和一个cout会造成这么大的时间差吗？
by LDlornd @ 2017-08-06 22:04:14
@[2016陈常杰](/space/show?uid=14738) 是不是因为这道题的数据量大全局变量多所导致的啊？
by LDlornd @ 2017-08-06 22:09:02
@[computerlover](/space/show?uid=28747) 说错了，是printf和cout。。。
by 1124828077ccj @ 2017-08-07 09:12:24
@[2016陈常杰](/space/show?uid=14738) 谢谢了
by LDlornd @ 2017-08-08 19:20:11
据说，c语言和c++的输入输出混着用会使是时间效率大大降低！
by ZJH365 @ 2018-02-22 16:47:00
@[LDlornd](/space/show?uid=28747) 这有个我的48ms更快的（逃）
```cpp
#pr\
agma GCC optimize("O3")
#include<cstdio>
#include<algorithm>
using namespace std;
#define ll long long
const int INF = 0x7fffffff;
const int maxn = 1e6+10;
int n, k, m, t[maxn << 2];
namespace io
{
#define getc() (S == T && (T = (S = B) + fread(B, 1, MAXBUF, stdin), S == T) ? 0 : *S++)
const int MAXBUF = 1 << 22;
char B[MAXBUF], *S = B, *T = B;
template<class Type> inline Type read()
{
register Type aa = 0;
register bool bb = 0;
register char ch, *S = io::S, *T = io::T;
for (ch = getc(); (ch < '0' || ch > '9') && ch != '-'; ch = getc())
;
for (ch == '-' ? bb = 1 : aa = ch - '0', ch = getc(); '0' <= ch && ch <= '9'; ch = getc())
aa = aa * 10 + ch - '0';
io::S = S, io::T = T;
return bb ? -aa : aa;
}
int(*F)() = read<int>;
template<> inline double read()
{
register double aa, bb;
register char ch;
register char *S = io::S, *T = io::T;
while (ch = getc(), (ch<'0' || ch>'9'))
; aa = ch - '0';
while (ch = getc(), (ch >= '0'&&ch <= '9'))
aa = aa * 10 + ch - '0';
if (ch == '.') {
bb = 1;
while (ch = getc(), ch >= '0'&&ch <= '9')
bb *= 0.1, aa += bb*(ch - '0');
}
io::S = S, io::T = T;
return aa;
}
char buff[MAXBUF], *iter = buff;
template<class T>inline void P(register T x, register char ch = '\n')
{
static int stack[110];
register int O = 0;
register char *iter = io::iter;
if (!x)*iter++ = '0';
else
{
(x < 0) ? x = -x, *iter++ = '-' : 1;
for (; x; x /= 10)
stack[++O] = x % 10;
for (; O; *iter++ = '0' + stack[O--]);
}
*iter++ = ch, io::iter = iter;
}
inline void putc(register char ch) {
*iter++ = ch;
}
inline void ouput() { fwrite(buff, 1, iter - buff, stdout), iter = buff; }
}
using io::P;
int (*F)() = io::read<int>;
void build(int x) {
int a;
for (m = 1; m < x; m <<= 1);
for (register int i = m + 1; i <= x + m; ++i)
a = F(), t[i] = a;
for (register int i = m - 1; i; --i)
t[i] = min(t[i << 1], t[i << 1 | 1]);
}
int query(register int l, register int r) {
int ans = INF;
for (l += m - 1, r += m + 1; l ^ r ^ 1; l >>= 1, r >>= 1) {
if (~l & 1)
ans = min(ans, t[l ^ 1]);
if (r & 1)
ans = min(ans, t[r ^ 1]);
}
return ans;
}
int main(){
int x, y;
n = F();
k = F();
build(n);
for(register int i = k + 1; i <= n + 1; ++i){
P(query(i - k, i - 1)), io::ouput();
}
return 0;
}
```
by 权御天下 @ 2018-06-09 23:04:50
神仙~
by 森岛帆高 @ 2019-05-13 22:52:27