Compilare: user.cpp: In function ‘void Peul(int, int)’: user.cpp:15:32: 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:38:21: warning: unused variable ‘j’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best,ok,q,w; ^ user.cpp:38:23: warning: variable ‘ii’ set but not used [-Wunused-but-set-variable] int i,x,y,a,b,c,j,ii,jj,best,ok,q,w; ^ user.cpp:38:29: warning: variable ‘best’ set but not used [-Wunused-but-set-variable] int i,x,y,a,b,c,j,ii,jj,best,ok,q,w; ^ user.cpp:38:34: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int i,x,y,a,b,c,j,ii,jj,best,ok,q,w; ^ user.cpp:39:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("delay.in","r",stdin); ^ user.cpp:40:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("delay.out","w",stdout); ^ user.cpp:41:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:47:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&x,&y); ^ user.cpp:50:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&m); ^ user.cpp:62:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&a,&b,&c); ^