This documentation is automatically generated by online-judge-tools/verification-helper
#define PROBLEM "https://yukicoder.me/problems/1601"
#include <iostream>
#include "datastructure/range_set.hpp"
int main() {
long long d;
int q;
std::cin >> d >> q;
range_set<long long> st;
long long ans = 0;
while (q--) {
long long a, b;
std::cin >> a >> b;
st.insert(
a, b,
[&](long long l, long long r) { ans = std::max(ans, r - l + 1); },
[](long long, long long) {});
std::cout << ans << '\n';
}
}
#line 1 "test/yukicoder/1601.test.cpp"
#define PROBLEM "https://yukicoder.me/problems/1601"
#include <iostream>
#line 2 "datastructure/range_set.hpp"
#include <map>
template <typename T>
struct range_set {
public:
range_set(bool merge_adjacent = true) : _merge_adjacent(merge_adjacent) {
}
typename std::map<T, T>::const_iterator get(T p) const {
auto it = ranges.upper_bound(p);
if (it == ranges.begin()) return ranges.end();
if (std::prev(it)->second < p) return ranges.end();
return std::prev(it);
}
typename std::map<T, T>::const_iterator get(T l, T r) const {
auto it = get(l);
if (it == ranges.end()) return ranges.end();
if (it->second < r) return ranges.end();
return it;
}
void insert(T l, T r) {
insert(l, r, [](T, T) {}, [](T, T) {});
}
template <class op_insert, class op_erase>
void insert(T l, T r, const op_insert &f, const op_erase &g) {
auto it_l = ranges.upper_bound(l);
auto it_r = ranges.upper_bound(r + T(_merge_adjacent));
if (it_l != ranges.begin() &&
l - T(_merge_adjacent) <= std::prev(it_l)->second) {
it_l--;
}
for (auto it = it_l; it != it_r; it = ranges.erase(it)) {
l = std::min(l, it->first);
r = std::max(r, it->second);
g(it->first, it->second);
}
ranges[l] = r;
f(l, r);
}
void erase(T l, T r) {
erase(l, r, [](T, T) {}, [](T, T) {});
}
template <class op_insert, class op_erase>
void erase(T l, T r, const op_insert &f, const op_erase &g) {
auto it_l = ranges.upper_bound(l);
auto it_r = ranges.upper_bound(r);
if (it_l != ranges.begin() && l <= std::prev(it_l)->second) {
it_l--;
}
T nl = std::min(l, it_l->first);
T nr = std::max(r, std::prev(it_r)->second);
for (auto it = it_l; it != it_r; it = ranges.erase(it)) {
g(it->first, it->second);
}
if (nl < l) {
ranges[nl] = l - 1;
f(nl, l - 1);
}
if (r < nr) {
ranges[r + 1] = nr;
f(r + 1, nr);
}
}
typename std::map<T, T>::const_iterator begin() const {
return ranges.begin();
}
typename std::map<T, T>::const_iterator end() const {
return ranges.end();
}
private:
std::map<T, T> ranges;
bool _merge_adjacent;
};
#line 6 "test/yukicoder/1601.test.cpp"
int main() {
long long d;
int q;
std::cin >> d >> q;
range_set<long long> st;
long long ans = 0;
while (q--) {
long long a, b;
std::cin >> a >> b;
st.insert(
a, b,
[&](long long l, long long r) { ans = std::max(ans, r - l + 1); },
[](long long, long long) {});
std::cout << ans << '\n';
}
}