0_0_32885806_31513.cpp: In function 'int main()': 0_0_32885806_31513.cpp:10:13: error: expected ')' before 'printf' printf("-1\n"); ^ 0_0_32885806_31513.cpp:11:46: error: expected ')' before ';' token else printf("%d\n",((x%10)+(y%10)%10); ^