subtasks:
  - score: 60
    type: sum
    cases: ['01','02','03','04','05','06','07','08','09',10,11,12]
  - score: 20
    type: sum
    cases: [13,14,15,16]
  - score: 20
    type: sum
    cases: [17,18,19,20]
    
inputFile: 'PAIR21#.in'
outputFile: 'PAIR21#.out'