快读

快读原理很简单。

inline int read(){ 
int k=0;char f=1,c=getchar(); 
for(;!isdigit(c);c=getchar())if(c=='-')f=-1; 
for(;isdigit(c);c=getchar())k=k*10+c-'0'; 
return k*f; 
}

其他几个模板：https://blog.csdn.net/qq_40515553/article/details/80732719?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.compare&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.compare

https://blog.csdn.net/qq_36297813/article/details/87874335?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.compare&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.compare

https://blog.csdn.net/sjc_0910/article/details/102642312?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.compare&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-3.compare

https://blog.csdn.net/ivan_zcy/article/details/83153186