Compilare: user.cpp: In function ‘long int collide(long int, long int)’: user.cpp:51:27: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rem |= (1 << i-1); ^ user.cpp:52:27: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] rem |= (1 << i+1); ^ user.cpp:55:21: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] if(rez & (1 << n-1)) { ^ user.cpp:56:23: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] rem |= (1 << n-2); ^ user.cpp: In function ‘void bellman()’: user.cpp:87:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); i++) { ^ user.cpp: In function ‘void dijkstra(int)’: user.cpp:116:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); i++) { ^ user.cpp: In function ‘void afis(std::vector<int>&)’: user.cpp:144:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<V.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:154:13: warning: unused variable ‘c’ [-Wunused-variable] long a, c, t; ^