Compilare: main.cpp: In function 'int main()': main.cpp:51:20: warning: 'j0' may be used uninitialized [-Wmaybe-uninitialized] 51 | q.push_back({i0, j0}); | ~~~~~~~~~~~^~~~~~~~~~ main.cpp:17:29: note: 'j0' was declared here 17 | int i, j, N, M, i0, j0, k; | ^~ main.cpp:51:20: warning: 'i0' may be used uninitialized [-Wmaybe-uninitialized] 51 | q.push_back({i0, j0}); | ~~~~~~~~~~~^~~~~~~~~~ main.cpp:17:25: note: 'i0' was declared here 17 | int i, j, N, M, i0, j0, k; | ^~ main.cpp:84:16: warning: 'p.pos::j' may be used uninitialized [-Wmaybe-uninitialized] 84 | fprintf(g, "%d\n", dist[p.i][p.j]); | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:20:13: note: 'p.pos::j' was declared here 20 | pos p; | ^ main.cpp:84:16: warning: 'p.pos::i' may be used uninitialized [-Wmaybe-uninitialized] 84 | fprintf(g, "%d\n", dist[p.i][p.j]); | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:20:13: note: 'p.pos::i' was declared here 20 | pos p; | ^