View Compilation Error

0_0_15573627_263.cpp: In function 'int main()':
0_0_15573627_263.cpp:12:18: error: redeclaration of 'int i'
          int len,i;
                  ^
0_0_15573627_263.cpp:11:13: note: 'int i' previously declared here
         int i = m-1;
             ^
0_0_15573627_263.cpp:24:13: error: redeclaration of 'int len'
         int len,i;
             ^
0_0_15573627_263.cpp:12:14: note: 'int len' previously declared here
          int len,i;
              ^
0_0_15573627_263.cpp:24:17: error: redeclaration of 'int i'
         int len,i;
                 ^
0_0_15573627_263.cpp:11:13: note: 'int i' previously declared here
         int i = m-1;
             ^