Compilare: main.cpp: In function 'void precomputePrimes(ll)': main.cpp:21:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | #define FOR(i,a,b) for (int i = (a); i < (b); ++i) | ^ main.cpp:73:5: note: in expansion of macro 'FOR' 73 | FOR(i,2,prime.size()){ | ^~~ main.cpp: In function 'void floodFill(ll, ll, ll)': main.cpp:21:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | #define FOR(i,a,b) for (int i = (a); i < (b); ++i) | ^ main.cpp:22:18: note: in expansion of macro 'FOR' 22 | #define F0R(i,a) FOR(i,0,a) | ^~~ main.cpp:378:5: note: in expansion of macro 'F0R' 378 | F0R(d,fFQ.size()){//uses a 2d vector to sort; I still named it a Q though. | ^~~ main.cpp:381:28: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare] 381 | while(fFQ[d].size()>fFTempIndex){ | ~~~~~~~~~~~~~^~~~~~~~~~~~