Compilare: user.cpp: In function ‘void mo()’: user.cpp:105:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < bu[b].size() && (bu[b][i].a / SQR == bu[b][i].b / SQR); ++i) ^ user.cpp:107:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; i < bu[b].size(); ++i) { ^ user.cpp: In function ‘char nextch()’: user.cpp:26:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, BMAX, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:114:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("razbunare.in", "r", stdin); ^ user.cpp:115:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("razbunare.out", "w", stdout); ^