Compilare: main.cpp: In function 'void solve()': main.cpp:149:12: warning: unused variable 'j' [-Wunused-variable] int i, j; ^ main.cpp:221:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("gminmax.out","w",stdout); ^ main.cpp: In function 'int main()': main.cpp:241:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("gminmax.in","r",stdin); ^ main.cpp: In function 'void cit(int&)': main.cpp:31:44: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++pz==dim)fread(ax,1,dim,stdin),pz=0; ^ main.cpp:39:44: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++pz==dim)fread(ax,1,dim,stdin),pz=0; ^