Compilare: user.cpp: In function ‘int readint()’: user.cpp:99:46: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer , 1 , bsize , stdin); ^ user.cpp:111:46: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer , 1 , bsize , stdin); ^ user.cpp: In function ‘long long int readlonglong()’: user.cpp:128:46: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer , 1 , bsize , stdin); ^ user.cpp:140:46: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer , 1 , bsize , stdin); ^ user.cpp: In function ‘int main()’: user.cpp:151:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hamster.in" , "r" , stdin); ^ user.cpp:152:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hamster.out" , "w" , stdout); ^ user.cpp:154:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer , 1 , bsize , stdin); ^ user.cpp: In function ‘void subtask2()’: user.cpp:77:22: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized] lmin[i] = ret; ^