graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;

          graph LR
          start[开始] --> input[输入A,B,C]
          input --> conditionA{A是否大于B}
          conditionA -- YES --> conditionC{A是否大于C}
          conditionA -- NO --> conditionB{B是否大于C}
          conditionC -- YES --> printA[输出A]
          conditionC -- NO --> printC[输出C]
          conditionB -- YES --> printB[输出B]
          conditionB -- NO --> printC[输出C]
          printA --> stop[结束]
          printC --> stop
          printB --> stop