Compilare: user.cpp: In function ‘void afis(std::vector<int>&)’: user.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size(); i++) { ^ user.cpp: In function ‘void getPath(int, int)’: user.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L[s].size(); i++) { ^ user.cpp: In function ‘void dfs(int)’: user.cpp:65:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L[s].size(); i++) { ^ user.cpp: In function ‘void res()’: user.cpp:74:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L[destination].size(); i++) { ^ user.cpp: In function ‘void resGraph()’: user.cpp:96:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i<PATH.size(); i++) { ^ user.cpp:99:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<PATH.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:131:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L[source].size(); i++) { ^