src.c:1:4: error: expected expression before 'int'
n1=int{input("")}
^
src.c:2:4: error: expected expression before 'int'
n2=int{input("")}
^
src.c:3:4: error: expected expression before 'int'
n3=int{input("")}
^
src.c:4:9: error: expected ')' before ' ' token
print(n1 n2 n3)
^