Compilare: user.cpp: In function ‘void bmf()’: user.cpp:25:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[b].size();i++){ ^ user.cpp:17:18: warning: unused variable ‘sol’ [-Wunused-variable] int i,j,b,a,c,d,sol=INF,y; ^ user.cpp:17:26: warning: unused variable ‘y’ [-Wunused-variable] int i,j,b,a,c,d,sol=INF,y; ^ user.cpp: In function ‘int main()’: user.cpp:52:17: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(in); ^ user.cpp:53:18: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(out); ^ user.cpp:54:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:56:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&A[i]); ^ user.cpp:57:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ user.cpp:60:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&a,&b,&t,&w); ^