View Compilation Error

0_0_23159745_7334.cpp: In function 'int main()':
0_0_23159745_7334.cpp:41:6: error: expected '}' before 'else'
      else ans+=(vis[i]*vis[j]);
      ^
0_0_23159745_7334.cpp:45:20: error: 'ans' was not declared in this scope
   printf("%I64d\n",ans);
                    ^
0_0_23159745_7334.cpp: At global scope:
0_0_23159745_7334.cpp:47:1: error: expected declaration before '}' token
 }
 ^