Compilare: user.cpp: In function ‘int bellman_ford(int)’: user.cpp:6:21: warning: integer overflow in expression [-Woverflow] #define inf (1<<31)-1 ^ user.cpp:19:26: note: in expansion of macro ‘inf’ dist[i][j] = inf; ^ user.cpp:32:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(watt >= it.second.second) ^ user.cpp:6:21: warning: integer overflow in expression [-Woverflow] #define inf (1<<31)-1 ^ user.cpp:50:16: note: in expansion of macro ‘inf’ int minn = inf; ^