Compilare: main.cpp: In function 'int main(int, const char**)': main.cpp:12:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define max(a, b) ((a > b) ? a : b) main.cpp:48:22: lmax=max(poz.size(),lmax); ~~~~~~~~~~~~ main.cpp:48:18: note: in expansion of macro 'max' lmax=max(poz.size(),lmax); ^~~ main.cpp:12:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define max(a, b) ((a > b) ? a : b) main.cpp:54:22: lmax=max(poz.size(),lmax); ~~~~~~~~~~~~ main.cpp:54:18: note: in expansion of macro 'max' lmax=max(poz.size(),lmax); ^~~ main.cpp:19:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aiacusarpe.in","r",stdin); ^ main.cpp:20:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("aiacusarpe.out","w",stdout); ^ main.cpp:21:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&m,&t); ^ main.cpp:28:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch); ^