Compilare: user.cpp: In function ‘void Peul(int, int)’: user.cpp:14:32: 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:33:15: warning: unused variable ‘a’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:33:17: warning: unused variable ‘b’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:33:19: warning: unused variable ‘c’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:33:21: warning: unused variable ‘j’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:33:23: warning: unused variable ‘ii’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:33:26: warning: unused variable ‘jj’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:33:29: warning: unused variable ‘best’ [-Wunused-variable] int i,x,y,a,b,c,j,ii,jj,best; ^ user.cpp:34:34: 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:35:36: 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:36:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:39:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ",&t[i]); ^ user.cpp:42:31: 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:45:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&m); ^