Compilare: main.cpp: In function 'int main(int, const char**)': main.cpp:37:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lmax<poz.size()) ~~~~^~~~~~~~~~~ main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lmax<poz.size()) ~~~~^~~~~~~~~~~ main.cpp:56:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lmax<poz.size()) ~~~~^~~~~~~~~~~ main.cpp:17:39: 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:18:41: 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:19:31: 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:26:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch); ^