src.c:1:1: error: unknown type name 'One'
One line contains two integer a,b (0<=a,b<=10)
^
src.c:1:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'contains'
One line contains two integer a,b (0<=a,b<=10)
^
src.c:1:10: error: unknown type name 'contains'