Compilare: main.cpp: In function 'void read(int&)': main.cpp:19:45: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ main.cpp:24:45: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ main.cpp: In function 'int main()': main.cpp:67:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bemo.in", "r", stdin); freopen("bemo.out", "w", stdout); ^ main.cpp:67:69: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bemo.in", "r", stdin); freopen("bemo.out", "w", stdout); ^ main.cpp:86:38: warning: 'mn' may be used uninitialized in this function [-Wmaybe-uninitialized] if ((x==1 || mx<=y) && (x==n ||mn>=y)) { ~~~~~~^~~~~~~~ main.cpp:86:24: warning: 'mx' may be used uninitialized in this function [-Wmaybe-uninitialized] if ((x==1 || mx<=y) && (x==n ||mn>=y)) { ^