inline int read() {char c &#61; getchar(); int x &#61; 0, f &#61; 1;while(c <&#39;0&#39; || c > &#39;9&#39;) {if(c &#61;&#61; &#39;-&#39;) f &#61; -1; c &#61; getchar();}while(c >&#61; &#39;0&#39; && c <&#61; &#39;9&#39;) x &#61; x * 10 &#43; c - &#39;0&#39;, c &#61; getchar();return x * f; } 用法&#xff1a; int a &#61; read(), b &#61; read(); cout <