View Compilation Error

0_0_14693627_28143.cpp: In function 'int main()':
0_0_14693627_28143.cpp:34:21: error: 'x' was not declared in this scope
    if(a+b>n-1 || mp[x+1][n-y]==n-x-y) continue;
                     ^
0_0_14693627_28143.cpp:34:28: error: 'y' was not declared in this scope
    if(a+b>n-1 || mp[x+1][n-y]==n-x-y) continue;
                            ^