Compilare: user.cpp: In function ‘int Compute(int, int, int)’: user.cpp:41:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(v[x].y>=v[k].y) ^ user.cpp: In function ‘int main()’: user.cpp:65:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("photo.in","r",stdin); ^ user.cpp:66:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("photo.out","w",stdout); ^ user.cpp:68:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&a); ^ user.cpp:70:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&v[i].x,&v[i].y); ^ user.cpp: In function ‘int Compute(int, int, int)’: user.cpp:58:62: warning: ‘up’ may be used uninitialized in this function [-Wmaybe-uninitialized] answer=minimum(answer,1+Compute(left,right,up)); ^ user.cpp: In function ‘int main()’: user.cpp:77:35: warning: ‘which’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d",Compute(1,n,which)); ^