Submission #441291

#	Time	Username	Problem	Language	Result	Execution time	Memory
441291		2qbingxuan	Segments (IZhO18_segments)	C++14	0 / 100	649 ms	2492 KiB

segments

// Knapsack DP is harder than FFT.
#include<bits/stdc++.h>
using namespace std;
typedef long long ll; typedef pair<int,int> pii; typedef pair<ll,ll> pll;
#define ff first
#define ss second
#define pb emplace_back
#define AI(x) begin(x),end(x)
template<class I>bool chmax(I&a,I b){return a<b?(a=b,true):false;}
template<class I>bool chmin(I&a,I b){return b<a?(a=b,true):false;} 
#ifdef OWO
#define debug(args...) SDF(#args, args)
#define OIU(args...) ostream& operator<<(ostream&O,args)
#define LKJ(S,B,E,F) template<class...T>OIU(S<T...>s){O<<B;int c=0;for(auto i:s)O<<(c++?", ":"")<<F;return O<<E;}
LKJ(vector,'[',']',i)LKJ(deque,'[',']',i)LKJ(set,'{','}',i)LKJ(multiset,'{','}',i)LKJ(unordered_set,'{','}',i)LKJ(map,'{','}',i.ff<<':'<<i.ss)LKJ(unordered_map,'{','}',i.ff<<':'<<i.ss)
template<class...T>void SDF(const char* s,T...a){int c=sizeof...(T);if(!c){cerr<<"\033[1;32mvoid\033[0m\n";return;}(cerr<<"\033[1;32m("<<s<<") = (",...,(cerr<<a<<(--c?", ":")\033[0m\n")));}
template<class T,size_t N>OIU(array<T,N>a){return O<<vector<T>(AI(a));}template<class...T>OIU(pair<T...>p){return O<<'('<<p.ff<<','<<p.ss<<')';}template<class...T>OIU(tuple<T...>t){return O<<'(',apply([&O](T...s){int c=0;(...,(O<<(c++?", ":"")<<s));},t),O<<')';}
#else
#pragma GCC optimize("Ofast")
#define debug(...) ((void)0)
#endif
 
const int inf = INT_MAX;
 
struct PRE : vector<pii> { 
	void build(){
		if(empty()) return;
		sort(AI());
		auto i = begin(), j = next(i);
		while(j != end()){
			if(i->ff == j->ff) i->ss += j->ss;
			else ++i, *i = *j, i->ss += prev(i)->ss;
			++j;
		}
		erase(next(i), end()); 
	}
	int query(int p){
		auto i = lower_bound(AI(), pii(p, inf));
		return (i == begin() ? 0 : prev(i)->ss);
	}
};
 
const int kN = 200002;
int n, t;
 
int tot = 0;
pii seg[kN];
 
int cnt, bnd;
PRE sl, sr;
vector<tuple<int, int, int>> tmp; 
void eek(){
	++cnt; if(cnt < bnd) return;
	cnt = 0;
	// rebuild
	for(auto [l, r, v]: tmp){
		sl.pb(l, v);
		sr.pb(r, v);
	}
	tmp.clear();
	debug(sl, sr);
	sl.build();
	sr.build();
	debug(sl, sr);
}
void insert(int l, int r){
	seg[++tot] = pii(l, r);
	tmp.pb(l, r, 1);
	eek();
}
void remove(int id){
	auto [l, r] = seg[id];
	tmp.pb(l, r, -1);
	eek();
}
int query(int ql, int qr, int k){
	//assert(k == 1);
	//debug(sl, sr);
	// #( l <= qr ) - #( r < ql )
	int ans = sl.query(qr) - sr.query(ql-1);
	for(auto [l, r, v]: tmp){ 
		if(l <= qr) ans += v;
		if(r < ql) ans -= v;
	}
	return ans;
}
 
signed main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> t;
	bnd = ceil(sqrt(n));
	int lastans = 0;
	for(int cmd, a, b, k, id, i = 0; i < n; ++i){
		cin >> cmd;
		if(cmd == 1){
			cin >> a >> b;
			int l = (a ^ (lastans * t));
			int r = (b ^ (lastans * t));
			if(l > r) swap(l, r);
			insert(l, r); 
		} else if(cmd == 2){
			cin >> id;
			remove(id);
		} else if(cmd == 3){
			cin >> a >> b >> k;
			int l = (a ^ (lastans * t));
			int r = (b ^ (lastans * t));
			if(l > r) swap(l, r);
			lastans = query(l, r, k);
			cout << lastans << '\n';
		}
	}
	return 0;
}

Compilation message (stderr)

segments.cpp: In function 'void eek()':
segments.cpp:56:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   56 |  for(auto [l, r, v]: tmp){
      |           ^
segments.cpp: In function 'void remove(int)':
segments.cpp:72:7: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   72 |  auto [l, r] = seg[id];
      |       ^
segments.cpp: In function 'int query(int, int, int)':
segments.cpp:81:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   81 |  for(auto [l, r, v]: tmp){
      |           ^

• Subtask 1: 0 / 7
• Subtask 2: 0 / 15
• Subtask 3: 0 / 16
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 25