Compilare: main.cpp: In function 'int main()': main.cpp:14:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(st.empty() != true && st.top() <= nr && n - i + 1> (m - st.size())) ~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:8:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trompeta.in" , "r" , stdin); ^ main.cpp:9:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trompeta.out" , "w" , stdout); ^ main.cpp:10:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d" , &n , &m); ^ main.cpp:13:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%1d" , &nr); ^