Compilare: main.cpp: In function 'void Solve()': main.cpp:158:17: warning: unused variable 'Up_Limit' [-Wunused-variable] int Up_Limit = r + 1; ^~~~~~~~ main.cpp: In function 'int main()': main.cpp:193:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("qxy.in", "r", stdin); ^ main.cpp:194:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("qxy.out", "w", stdout); ^ main.cpp: In function 'char C()': main.cpp:57:37: 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, BSIZE, stdin); ^