Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:33:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:52:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[tt].size();i++) ^ user.cpp:59:9: warning: unused variable ‘a’ [-Wunused-variable] int a; ^ user.cpp: In function ‘void citire()’: user.cpp:17:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d%d%d",&n,&m,&x,&y); ^ user.cpp:21:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d%d%d",&j,&k,&l); ^ user.cpp: In function ‘int main()’: user.cpp:56:19: warning: ‘sc’ may be used uninitialized in this function [-Wmaybe-uninitialized] else c-=sc; ^