Compilare: main.cpp: In function 'void computeRMQ()': main.cpp:120:18: warning: unused variable 'len' [-Wunused-variable] for(int p=1, len; p<=17; p++){ ^~~ main.cpp: In function 'void read(int&)': main.cpp:26:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(in, sizeof in, buffer, fin); ^ main.cpp:33:38: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(in, 0, buffer, fin); ^