Compilare: user.cpp: In function ‘unsigned int bfs(int, int)’: user.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i<= n; i++) ^ user.cpp:24:21: warning: unused variable ‘t’ [-Wunused-variable] int i, j, l, y, t, w, p, c; ^ user.cpp: In function ‘int main()’: user.cpp:68:34: warning: narrowing conversion of ‘y’ from ‘unsigned int’ to ‘int’ inside { } [-Wnarrowing] ls[x].push_back({y, t, w}); ^ user.cpp:68:34: warning: narrowing conversion of ‘t’ from ‘unsigned int’ to ‘int’ inside { } [-Wnarrowing] user.cpp:68:34: warning: narrowing conversion of ‘w’ from ‘unsigned int’ to ‘int’ inside { } [-Wnarrowing] user.cpp:69:34: warning: narrowing conversion of ‘x’ from ‘unsigned int’ to ‘int’ inside { } [-Wnarrowing] ls[y].push_back({x, t, w}); ^ user.cpp:69:34: warning: narrowing conversion of ‘t’ from ‘unsigned int’ to ‘int’ inside { } [-Wnarrowing] user.cpp:69:34: warning: narrowing conversion of ‘w’ from ‘unsigned int’ to ‘int’ inside { } [-Wnarrowing]