Compilare: user.cpp: In function ‘void Dijkstra(int)’: user.cpp:31:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0; i < V[ nod ].size(); ++i ) { ^ user.cpp:17:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, fiu, nod, cost; ^ user.cpp: In function ‘int main()’: user.cpp:49:17: warning: unused variable ‘j’ [-Wunused-variable] int n,m, i, j, x, y, c; ^ user.cpp:46:41: 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:47:43: 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 ); ^ user.cpp:51:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d",&n,&m ); ^ user.cpp:53:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d%d",&x,&y,&c ); ^