Compilare: user.cpp: In function ‘int bs1(int, int, int)’: user.cpp:9:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[med] <= val){ ^ user.cpp: In function ‘int bs2(int, int, int)’: user.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[med] > val){ ^ user.cpp: In function ‘int check(int, int, int)’: user.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[n] - v[1] <= med) ^ user.cpp: In function ‘int main()’: user.cpp:60:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("orase1.in", "r", stdin); ^ user.cpp:61:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("orase1.out", "w", stdout); ^ user.cpp:63:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:65:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp: In function ‘int bs1(int, int, int)’: user.cpp:16:10: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^ user.cpp: In function ‘int check(int, int, int)’: user.cpp:21:15: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] med = (st + dr) / 2; ^ user.cpp:6:12: note: ‘last’ was declared here int med, last; ^