0_0_39540905_8934.cpp: In function 'bool check(int, std::vector<std::vector<int> >&, std::vector<int>)':
0_0_39540905_8934.cpp:50:13: error: 'xx' was not declared in this scope; did you mean 'x'?
50 | xx++;
| ^~
| x
0_0_39540905_8934.cpp:55:13: error: 'yy' was not declared in this scope; did you mean 'y'?
55 | yy++;
| ^~
| y
|