Compilare: main.cpp: In function 'void write(unsigned int)': main.cpp:54:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= p; i++) ~~^~~~ main.cpp: At global scope: main.cpp:30:37: warning: always_inline function might not be inlinable [-Wattributes] __attribute__((always_inline)) void write(unsigned int x) ^~~~~ main.cpp: In function 'int main()': main.cpp:64:59: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n, a, b, c; fscanf(in, "%d%d%d%d", &n, &a, &b, &c); ^