Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:42:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<A[nod].size(); i++) ^ user.cpp: In function ‘int cbin(int, int)’: user.cpp:53:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (step=1; step<=A[x].size(); step<<=1); ^ user.cpp:55:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i+step<A[x].size() && A[x][i+step].f<y) ^ user.cpp: In function ‘int cauta(int, int)’: user.cpp:63:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (poz<A[x].size()) ^ user.cpp:65:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=poz; i<A[x].size(); i++) ^ user.cpp: In function ‘void read()’: user.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:22:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:103:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("johnie.in","r",stdin); ^ user.cpp:104:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("johnie.out","w",stdout); ^