Compilare: main.cpp: In function 'void power(int*, ll, int*)': main.cpp:51:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<cycle.size(); ++j) ~^~~~~~~~~~~~~ main.cpp: In function 'void refresh()': main.cpp:71:47: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] cursor = 0, fread(buffer, 1, bsize, stdin); ^ main.cpp: In function 'int main()': main.cpp:96:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hideandseek.in", "r", stdin); ^ main.cpp:97:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hideandseek.out", "w", stdout); ^