View Compilation Error

0_0_25277056_30836.cpp: In function 'int main()':
0_0_25277056_30836.cpp:73:28: error: 'm' was not declared in this scope
     while (scanf("%d %d", &m, &n) != EOF) {
                            ^
0_0_25277056_30836.cpp:73:32: error: 'n' was not declared in this scope
     while (scanf("%d %d", &m, &n) != EOF) {
                                ^