Compilare: main.cpp: In function 'int main()': main.cpp:40:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for ( j = 0; j < mat[i].size(); j++ ) { | ~~^~~~~~~~~~~~~~~ main.cpp:85:36: warning: 'finish_y' may be used uninitialized in this function [-Wmaybe-uninitialized] 85 | if ( viz[finish_x][finish_y] == 1 ) | ~~~~~~~~~~~~~~~~~~~~~~^ main.cpp:85:36: warning: 'finish_x' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:73:8: warning: 'start_y' may be used uninitialized in this function [-Wmaybe-uninitialized] 73 | dr = dist[start_x][start_y]; | ~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:73:8: warning: 'start_x' may be used uninitialized in this function [-Wmaybe-uninitialized]