0_0_36969404_8149.cpp: In function 'int main()': 0_0_36969404_8149.cpp:6:3: error: 'll' was not declared in this scope ll ans=1ll*7*(n+1)-1; ^ 0_0_36969404_8149.cpp:7:19: error: 'ans' was not declared in this scope printf("%lld\n",ans); ^