Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:40:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < a[p.x].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:59:31: warning: narrowing conversion of 'x3' from 'int' to 'unsigned int' inside { } [-Wnarrowing] a[x1].push_back({x3, x4, x2}); ^ main.cpp:60:31: warning: narrowing conversion of 'x3' from 'int' to 'unsigned int' inside { } [-Wnarrowing] a[x2].push_back({x3, x4, x1}); ^ main.cpp: In function 'void solve()': main.cpp:67:14: warning: integer overflow in expression [-Woverflow] costmin = 2 * Inf; ~~^~~~~ main.cpp:72:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (d[n] < costmin) { ~~~~~^~~~~~~~~