Compilare: main.cpp: In function 'int main()': main.cpp:12:85: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in","r",stdin),freopen("hashuri.out","w",stdout),scanf("%d",&n); ^ main.cpp:12:85: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:12:85: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:15:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d%d",&x,&y),z=y%M,p=q=h[z];p&&p->I!=y;q=p,p=p->U); ^