Compilare: user.cpp: In function ‘bool bellmanFord(int)’: user.cpp:6:22: warning: integer overflow in expression [-Woverflow] #define Inf ((1<<31)-1) ^ user.cpp:33:25: note: in expansion of macro ‘Inf’ m[first].assign(n+1,Inf); ^ user.cpp:44:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[p].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:73:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i< m[1].size();i++) ^ user.cpp:69:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.in","rt",stdin); ^ user.cpp:70:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.out","wt",stdout); ^