老番茄酱

CODING\mathbb{CODING}CODING inline int read(){ int x = 0, f = 1; char ch = getchar(); while(ch < '0' || ch > '9') if(ch == '-'){ f = -1; ch = getchar(); } while(ch >= '0' || ch <= '9'){ x = x * 10 + ch - '0'; // x = (x <<