Compilare: main.cpp: In function 'void solve()': main.cpp:62:43: warning: array subscript has type 'char' [-Wchar-subscripts] int x = Q.front().first + a[dir[z]]; ^ main.cpp:63:44: warning: array subscript has type 'char' [-Wchar-subscripts] int y = Q.front().second + b[dir[z]]; ^ main.cpp:65:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(z == dir.size() - 1) ~~^~~~~~~~~~~~~~~~~ main.cpp:71:30: warning: array subscript has type 'char' [-Wchar-subscripts] x += a[dir[z]],y += b[dir[z]]; ^ main.cpp:71:45: warning: array subscript has type 'char' [-Wchar-subscripts] x += a[dir[z]],y += b[dir[z]]; ^ main.cpp:82:26: warning: array subscript has type 'char' [-Wchar-subscripts] x += a[dir[z]],y += b[dir[z]]; ^ main.cpp:82:41: warning: array subscript has type 'char' [-Wchar-subscripts] x += a[dir[z]],y += b[dir[z]]; ^ main.cpp: In function 'int main()': main.cpp:2:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] #define FILES freopen("cobai.in","r",stdin);\ ^ main.cpp:100:5: note: in expansion of macro 'FILES' FILES ^~~~~ main.cpp:3:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.out","w",stdout); ^ main.cpp:100:5: note: in expansion of macro 'FILES' FILES ^~~~~