Compilare: main.cpp: In function 'void SolveCircular(int, int)': main.cpp:119:9: warning: unused variable 'l' [-Wunused-variable] int l = lft[i + m] - m; ^ main.cpp:120:9: warning: unused variable 'r' [-Wunused-variable] int r = rgt[i]; ^ main.cpp:113:13: warning: unused variable 'ans' [-Wunused-variable] long long ans = 0LL; ^~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:16:32: 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, 4096, fin); ^