View Compilation Error

0_0_36369484_15574.cpp: In function 'int main()':
0_0_36369484_15574.cpp:23:9: error: expected ';' before 'for'
         for (int i = r; i >= 1; i--)
         ^
0_0_36369484_15574.cpp:23:25: error: 'i' was not declared in this scope
         for (int i = r; i >= 1; i--)
                         ^