Compilare: main.cpp: In function 'int32_t main()': main.cpp:24:9: warning: unused variable 'lost' [-Wunused-variable] int lost=1; ^~~~ main.cpp:9:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("divk.in","r",stdin); ^ main.cpp:10:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("divk.out","w",stdout); ^ main.cpp:12:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld %lld %lld",&n,&k,&a,&b); ^ main.cpp:15:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&v[i]); ^