View Compilation Error

0_0_29051886_8679.cpp: In function 'int main()':
0_0_29051886_8679.cpp:123:17: error: 'nt' was not declared in this scope
                 nt++;
                 ^
0_0_29051886_8679.cpp:132:9: error: 'nt' was not declared in this scope
         nt++;
         ^