inline int Read() { int x = 0, f = 1, c = getchar(); for (; !isdigit(c); c = getchar()) if (c == ‘-‘) f = -1; for (; isdigit(c); c = getchar()) x = x * 10 + c - ‘0‘; return x * f; }
处理大数输入的模板
原文：https://www.cnblogs.com/huangzzz/p/8810364.html
