View Compilation Error

0_0_25882155_21301.cpp: In function 'int main()':
0_0_25882155_21301.cpp:25:18: error: 'cn' was not declared in this scope
     while(cin >> cn[0] >>cnt[1] >> cnt[2]&&cnt[0]+cnt[1]+cnt[2])
                  ^
0_0_25882155_21301.cpp:28:51: error: expected '}' at end of input
      for(int i = 1; i <=3 ;i++){sum += i*cnt[i-1];}
                                                   ^
0_0_25882155_21301.cpp:28:51: error: expected '}' at end of input