Compilare: main.cpp: In function 'void write(unsigned int)': main.cpp:44:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= p; i++) ~~^~~~ main.cpp: At global scope: main.cpp:20:37: 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:54:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("curcubeu.in", "r", stdin); ^ main.cpp:55:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("curcubeu.out", "w", stdout); ^ main.cpp:57:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &a, &b, &c); ^