Eroare de compilare: user.cpp: In function ‘int query(int)’: user.cpp:23:13: warning: statement has no effect [-Wunused-value] for (pos; pos <= n; pos += pos & -pos) ^ user.cpp: In function ‘void update(int, int)’: user.cpp:30:13: warning: statement has no effect [-Wunused-value] for (pos; pos; pos -= pos & -pos) ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:3: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&) [with _RandomAccessIterator = stalp*; _Tp = stalp]’: /usr/include/c++/4.8/bits/stl_algo.h:2307:70: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator) [with _RandomAccessIterator = stalp*]’ /usr/include/c++/4.8/bits/stl_algo.h:2338:54: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size) [with _RandomAccessIterator = stalp*; _Size = int]’ /usr/include/c++/4.8/bits/stl_algo.h:5475:36: required from ‘void std::sort(_RAIter, _RAIter) [with _RAIter = stalp*]’ user.cpp:47:20: required from here /usr/include/c++/4.8/bits/stl_algo.h:2269:19: error: passing ‘const stalp’ as ‘this’ argument of ‘bool stalp::operator<(const stalp&)’ discards qualifiers [-fpermissive] while (__pivot < *__last) ^ user.cpp: In function ‘int main()’: user.cpp:36:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi.in", "r", stdin); ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi.out", "w", stdout); ^ user.cpp:39:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:41:65: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &x[i], &s[i].c, &s[i].st, &s[i].dr); ^