View Compilation Error

0_0_29868529_6372.cpp: In function 'int main()':
0_0_29868529_6372.cpp:104:20: error: 'I' was not declared in this scope
                 if(I < 1)
                    ^
0_0_29868529_6372.cpp:106:21: error: 'flag' was not declared in this scope
                     flag = 1;
                     ^
0_0_29868529_6372.cpp:115:16: error: 'flag' was not declared in this scope
             if(flag == 1)
                ^