inline int read() { int a=0,b=1; char c=getchar(); while(c<'0'||c>'9') { if(c=='-') b=-1; c=getchar(); } while(c>='0'&&c<='9') { a=(a<<3)+(a<<1)+c-'0'; c=getchar(); } return a*b; } inline void out(int n) { if(n<0) { putchar('-'); n=-n; } if(n>=10) out(n/10); putchar(n%10+'0'); }
拿走不谢QwQ(应该仅限于数字吧)