Compilare: main.cpp: In function 'int main()': main.cpp:8:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("transport.in","r",stdin); ^ main.cpp:9:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("transport.out","w",stdout); ^ main.cpp:40:12: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<a; ^ main.cpp:33:17: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] if(k<=a && k<=K) ~~~~~^~~~~~~