testcases:
  - name: "testcase 1"
    inputs:
    - 1 : ['2', '1', '+', '3', '*']
    output: 
    - 1 : 9
  - name: "testcase 2"
    inputs:
    - 1: ["4","13","5","/","+"]
    output:
    - 1 : 6
  - name: "testcase 3"
    inputs:
    - 1 : ["10","6","9","3","+","-11","*","/","*","17","+","5","+"]
    output: 
    - 1 : 22
  - name: "testcase 4"
    inputs:
    - 1: ["3", "2", "*", "11", "-"]
    output:
    - 1 : -5
  - name: "testcase 5"
    inputs:
    - 1: ["2", "5", "*", "4", "+", "3", "2", "*", "1", "+", "/"]
    output:
    - 1 : 2