19-11= 26-4= 99-24= 29-8= 88-77=
50-50= 24-13= 10+20= 14+25= 31-11=
17-7= 19-12= 88-80= 25-4= 99-23=
24-13= 15+14= 90-10= 20+8= 25+33=
18+11= 28+2= 29+1= 25+25= 26-10=
12+5= 28+11= 25+12= 23-3= 12+10=
16+13= 24+4= 19+11= 17-12= 18-8=
19-6= 29+10= 72-10= 20+30= 99-98=
所需点数：2
