Compilare: user.cpp: In function ‘int main()’: user.cpp:73:25: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[305]’ [-Wformat=] scanf("\n%s",&S); ^ user.cpp:99:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (L[i].size()<K) ^ user.cpp:110:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (L[*it].size()<K && !ok[*it]) ^ user.cpp:66:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zone2.in","r",stdin); ^ user.cpp:67:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zone2.out","w",stdout); ^ user.cpp:69:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&N,&M,&K); ^ user.cpp:73:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n%s",&S); ^