Compilare: user.cpp: In function ‘void build(int, int, int)’: user.cpp:40:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ptr1 < AINT[2 * nod].val.size() || ptr2 < AINT[2 * nod + 1].val.size()) { ^ user.cpp:40:81: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ptr1 < AINT[2 * nod].val.size() || ptr2 < AINT[2 * nod + 1].val.size()) { ^ user.cpp:41:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (ptr1 == AINT[2 * nod].val.size()) ^ user.cpp:43:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if (ptr2 == AINT[2 * nod + 1].val.size()) ^ user.cpp: In function ‘void update(int, int, int, int, int)’: user.cpp:60:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (AINT[nod].val[med] == val) { ^ user.cpp:64:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (AINT[nod].val[med] < val) ^ user.cpp: In function ‘int cnt(int)’: user.cpp:97:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (AINT[nodes[i]].val[med] <= lim) { ^ user.cpp: In function ‘int main()’: user.cpp:127:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mess.in", "r", stdin); ^ user.cpp:128:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mess.out", "w", stdout); ^ user.cpp:131:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &q); ^ user.cpp:133:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x[i]); ^ user.cpp:145:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &op); ^ user.cpp:148:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &pos); ^ user.cpp:154:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &p, &q, &k); ^ user.cpp: In function ‘void update(int, int, int, int, int)’: user.cpp:77:28: warning: ‘where’ may be used uninitialized in this function [-Wmaybe-uninitialized] where += lsb(where); ^