Submission #673697

#	Time	Username	Problem	Language	Result	Execution time	Memory
673697		LastRonin	Fire (JOI20_ho_t5)	C++14	100 / 100	697 ms	52808 KiB

ho_t5

//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define f first
#define s second
#define mp make_pair
#define speed ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
using namespace std;
 
const int N = 2e5 + 100;
 
 
int n, q;
ll a[N];
int p[N], r[N];
 
 
ll st[6 * N], si[6 * N], sd[6 * N], que[6 * N];
 
ll ans[6 * N];
 
 
bool comp1(int i, int j) {
	if(st[i] == st[j])
		return (i < j);
	return (st[i] < st[j]);
}
bool comp2(int i, int j) {
	if(si[i] == si[j])
		return (i < j);
	return (si[i] < si[j]);
}
 
int shift;

struct fen {
	ll t[4 * N] = {0}, t2[4 * N] = {0};
	ll sum1 = 0, sum2 = 0;
	void clear() {
		sum1 = 0, sum2 = 0;
		for(int i = 0; i <= 2 * n + 10; i++)
			t[i] = t2[i] = 0;
	}
	void add(ll p, ll z, ll z2) {
		sum1 += z, sum2 += z2;
		for(int i = p; i <= 2 * n + 10; i = i|(i + 1)) {
			t[i] += z;
			t2[i] += z2;			
		}
	}
	pair<ll, ll> get(ll r) {
		ll s1 = 0, s2 = 0;
		for(int i = r; i >= 0; i = (i&(i+1)) - 1) {
			s1 += t[i];
			s2 += t2[i];  
		}
		return mp(s1, s2);
	}
} ret;
 
 
int main() {
	speed;
	cin >> n >> q;
	shift = n + 1;
	deque<int> s;
	for(int i = 1; i <= n; i++)
		cin >> a[i];
	for(int j = 1; j <= n; j++) {
		while(s.size() && a[s.back()] < a[j])s.pop_back();
		if(s.size())p[j] = s.back();
		s.push_back(j);
	}
	while(s.size())s.pop_back();
	
	for(int j = n; j >= 1; j--) {
		r[j] = n + 1;
		while(s.size() && a[s.back()] <= a[j])s.pop_back();
		if(s.size())r[j] = s.back();
		s.push_back(j);
	}
	int cnt = 1;
	for(int i = 1, t; i <= n; i++) {
		// 1
		st[cnt] = 1;
		sd[cnt] = a[i];
		si[cnt++] = i;
		// 2
		if(r[i] != n + 1) {
			st[cnt] = 1 + (r[i] - i);
			sd[cnt] = -a[i];
			si[cnt++] = r[i];
		}
		// 3
		if(p[i] != 0) {
			st[cnt] = 1 + (i - p[i]);
			sd[cnt] = -a[i];
			si[cnt++] = i;
			//4
			if(r[i] != n + 1) {
				st[cnt] = 1 + (r[i] - p[i]);  
				sd[cnt] = a[i];
				si[cnt++] = r[i];
			}
		}
	}
	vector<int> sbt;
	for(int i = 1; i <= n; i++)
		a[i] += a[i - 1];
 
	for(int i = 1; i <= q; i++) {
		ll t, l, r;
		cin >> t >> l >> r;
		t++;
		que[cnt] = i;
		st[cnt] = t;
		si[cnt++] = r;
 
		que[cnt] = -i;
		st[cnt] = t;
		si[cnt++] = l - 1;
	}
	//kek
	cnt--;
	for(int i = 1; i <= cnt; i++) {
		sbt.pb(i);
	}
	vector<int> queries;
	sort(sbt.begin(), sbt.end(), comp1);
	for(int i = 0; i < cnt; i++) {
		int s = sbt[i];
		if(que[s]) {
			ll qt = st[s], qi = si[s], znak = (que[s] < 0 ? -1 : 1);
			pair<ll, ll> ggg = ret.get(qt - qi + shift);
			ggg.f = ret.sum1 - ggg.f;
			ggg.s = ret.sum2 - ggg.s;
			ans[que[s] * znak] += znak * (qt + 1) * ggg.f;
			ans[que[s] * znak] -= znak * ggg.s;
		} else {
			ret.add(st[s] - si[s] + shift, sd[s], st[s] * sd[s]);
		}
	}
	ret.clear();
	sort(sbt.begin(), sbt.end(), comp2);
	for(int i = 0; i < cnt; i++) {
		int s = sbt[i];
		if(que[s]) {
			ll qt = st[s], qi = si[s], znak = (que[s] < 0 ? -1 : 1);
			pair<ll, ll> ggg = ret.get(qt - qi + shift);
			ans[que[s] * znak] += znak * (qi + 1) * ggg.f;
			ans[que[s] * znak] -= znak * ggg.s;
		} else {
			ret.add(st[s] - si[s] + shift, sd[s], si[s] * sd[s]);
		}
	}
	for(int i = 1; i <= q; i++)
		cout << ans[i] << "\n";    
}

Compilation message (stderr)

ho_t5.cpp: In function 'int main()':
ho_t5.cpp:85:17: warning: unused variable 't' [-Wunused-variable]
   85 |  for(int i = 1, t; i <= n; i++) {
      |                 ^

• Subtask 1: 1 / 1
• Subtask 2: 6 / 6
• Subtask 3: 7 / 7
• Subtask 4: 6 / 6
• Subtask 5: 80 / 80