Compilare: main.cpp: In function 'void solve()': main.cpp:34:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (++j1; j1 < n && h1.size() < L; ++j1) { ~~~~~~~~~~^~~ main.cpp:42:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (h1.size() == L) { ~~~~~~~~~~^~~~ main.cpp: In function 'void cit(int&)': main.cpp:15:57: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pz == dim) fread(ax, 1, dim, stdin),pz = 0; ^ main.cpp:18:58: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if (++pz == dim) fread(ax, 1, dim, stdin), pz = 0; ^ main.cpp: In function 'int main()': main.cpp:63:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in", "r", stdin); ^ main.cpp:64:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.out", "w", stdout); ^