Compilare: main.cpp: In function 'void genAll(int, long long int)': main.cpp:30:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(tr==d.size()) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:72:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc.in","r",stdin); ^ main.cpp:73:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desc.out","w",stdout); ^ main.cpp:76:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %i",&n,&k); ^