C++输入输出外挂

利用fread()函数进行优化，几乎是最好的一种优化方式了

#include <bits/stdc++.h>
// #define test TEST
using namespace std;
const int mod=1e9+7;
const int maxn=1e6+6;

typedef long long ll;
namespace IO {
#define BUF_SIZE 100000
//fread -> read
bool IOerror = 0;
inline char nc() {
static char buf[BUF_SIZE], *p1 = buf + BUF_SIZE, *pend = buf + BUF_SIZE;
if (p1 == pend) {
p1 = buf;
pend = buf + fread(buf, 1, BUF_SIZE, stdin);
if (pend == p1) {
IOerror = 1;
return -1;
}
}
return *p1++;
}
inline bool blank(char ch) {
return ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t';
}
inline bool read(int &x) {
char ch;
while (blank(ch = nc()));
if (IOerror)
return false;
for (x = ch - '0'; (ch = nc()) >= '0' && ch <= '9'; x = x * 10 + ch - '0');
return true;
}
#undef BUF_SIZE
};

int main(int argc, char const *argv[])
{
#ifdef test
freopen("test.txt","r",stdin);
#endif
int n;
while(IO::read(n)){
printf("%d\n",n);
}
return 0;
}