View Compilation Error

0_0_22661832_2420.cpp: In function 'int main()':
0_0_22661832_2420.cpp:4:1: error: 'unsighed' was not declared in this scope
 unsighed long long n,i,sum;
 ^
0_0_22661832_2420.cpp:5:22: error: 'n' was not declared in this scope
 while(~scanf("%llu",&n))
                      ^
0_0_22661832_2420.cpp:7:9: error: 'sum' was not declared in this scope
 if(n==1)sum=1;
         ^
0_0_22661832_2420.cpp:9:1: error: 'sum' was not declared in this scope
 sum = (1+n)*n/2;
 ^
0_0_22661832_2420.cpp:10:15: error: 'sum' was not declared in this scope
 printf("%llu",sum);
               ^