Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:6:21: warning: integer overflow in expression [-Woverflow] #define inf (1<<31)-1 ^ user.cpp:35:13: note: in expansion of macro ‘inf’ dist[i] = inf; ^ user.cpp:38:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < G[start].size(); i++){ ^ user.cpp:46:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ;i < G[top].size(); i++){ ^ user.cpp:6:21: warning: integer overflow in expression [-Woverflow] #define inf (1<<31)-1 ^ user.cpp:60:17: note: in expansion of macro ‘inf’ if(dist[i] == inf) ^ user.cpp: In function ‘void read()’: user.cpp:70:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:73:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&c); ^ user.cpp: In function ‘int main()’: user.cpp:80:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin); ^ user.cpp:81:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out","w",stdout); ^