View Compilation Error

0_0_19073709_20159.cpp: In function 'int main()':
0_0_19073709_20159.cpp:101:9: error: 'n' was not declared in this scope
         n=readint();m=readint();
         ^
0_0_19073709_20159.cpp:101:21: error: 'm' was not declared in this scope
         n=readint();m=readint();
                     ^