View Compilation Error

0_0_17921319_15457.cpp: In function 'int main()':
0_0_17921319_15457.cpp:83:13: error: 'res' was not declared in this scope
             res
             ^
0_0_17921319_15457.cpp:83:13: error: expected '}' at end of input
0_0_17921319_15457.cpp:83:13: error: expected '}' at end of input
0_0_17921319_15457.cpp:83:13: error: expected '}' at end of input