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답안 #330370

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
330370 2020-11-25T03:01:44 Z limabeans 별자리 3 (JOI20_constellation3) C++17
100 / 100
 547 ms 43500 KB 
#include <bits/stdc++.h>
using namespace std;

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl





using ll = long long;


const int maxn = 2e5 + 10;


int n;
ll a[maxn];

int m;
vector<pair<pair<ll,ll>,ll>> stars; //((y,x),c)
vector<int> byX[maxn];

int pre[maxn], nex[maxn];


struct segtree {
    int n;
    vector<ll> t, o;
    void init(int _n) {
	n=_n+10;
	t.assign(4*n,0);
	o.assign(4*n,0);
    }

    void push(int v, int tl, int tr) {
	if (!o[v]) return;
	int tm=(tl+tr)/2;
	t[2*v] += 1ll*(tm-tl+1)*o[v];
	t[2*v+1] += 1ll*(tr-tm)*o[v];
	o[2*v] += o[v];
	o[2*v+1] += o[v];
	o[v] = 0;
    }

    ll qry(int v, int tl, int tr, int l, int r) {
	if (l>tr || r<tl) return 0;
	if (l<=tl && tr<=r) return t[v];
	push(v,tl,tr);
	int tm=(tl+tr)/2;
	return qry(2*v,tl,tm,l,r)+qry(2*v+1,tm+1,tr,l,r);
    }

    void upd(int v, int tl, int tr, int l, int r, ll dx) {
	if (l>tr || r<tl) return;
	if (l<=tl && tr<=r) {
	    t[v] += 1ll*(tr-tl+1)*dx;
	    o[v] += dx;
	} else {
	    push(v,tl,tr);
	    int tm=(tl+tr)/2;
	    upd(2*v,tl,tm,l,r,dx);
	    upd(2*v+1,tm+1,tr,l,r,dx);
	    t[v]=t[2*v]+t[2*v+1];
	}
    }
};



int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);

    cin>>n;
    for (int i=1; i<=n; i++) {
	cin>>a[i];
	a[i]=n-a[i];
    }


    ll sum = 0;

    cin>>m;
    stars.resize(m);
    for (int i=0; i<m; i++) {
	cin>>stars[i].first.second>>stars[i].first.first>>stars[i].second;
	stars[i].first.first = n-stars[i].first.first+1;
	
	sum += stars[i].second;
    }

    sort(stars.rbegin(),stars.rend());

    for (int i=0; i<m; i++) {
	byX[stars[i].first.second].push_back(i);
    }


    set<pair<int,int>> st; //(a[i],i)
    stack<int> stk;
    st.insert({0,0});
    stk.push(0); // monoincreasing

    for (int i=1; i<=n; i++) {
	while (!stk.empty() && a[i]<=a[stk.top()]) {
	    st.erase({a[stk.top()],stk.top()});
	    stk.pop();
	}
	for (int idx: byX[i]) {
	    int y = stars[idx].first.first;
	    pre[idx] = prev(st.upper_bound({y,-1}))->second+1;
	}

	stk.push(i);
	st.insert({a[i],i});
    }

    while (stk.size()) stk.pop();
    st.clear();

    st.insert({0,n+1});
    stk.push(n+1);

    for (int i=n; i>=1; i--) {
	while (!stk.empty() && a[i]<=a[stk.top()]) {
	    st.erase({a[stk.top()],stk.top()});
	    stk.pop();
	}
	for (int idx: byX[i]) {
	    int y = stars[idx].first.first;
	    nex[idx] = prev(st.upper_bound({y,-1}))->second-1;
	}

	stk.push(i);
	st.insert({a[i],i});
    }


    // for (int i=0; i<m; i++) {
    // 	cout<<i+1<<": "<<pre[i]<<" "<<nex[i]<<endl;
    // }


    segtree tree;
    tree.init(n+10);

    for (int i=0; i<m; i++) {
	auto star = stars[i];
	int x = star.first.second;
	ll c = star.second;

	ll val = c + tree.qry(1,1,n,x,x);
	if (val>0) {
	    sum -= val;
	    tree.upd(1,1,n,pre[i],nex[i],-val);
	}
	
    }


    cout<<sum<<endl;    
    return 0;
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5228 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 5 ms 5376 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5228 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 5 ms 5376 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 6 ms 5356 KB Output is correct
24 Correct 7 ms 5356 KB Output is correct
25 Correct 7 ms 5356 KB Output is correct
26 Correct 6 ms 5356 KB Output is correct
27 Correct 6 ms 5356 KB Output is correct
28 Correct 6 ms 5356 KB Output is correct
29 Correct 5 ms 5356 KB Output is correct
30 Correct 6 ms 5356 KB Output is correct
31 Correct 6 ms 5356 KB Output is correct
32 Correct 6 ms 5356 KB Output is correct
33 Correct 6 ms 5356 KB Output is correct
34 Correct 6 ms 5484 KB Output is correct
35 Correct 6 ms 5356 KB Output is correct
36 Correct 5 ms 5356 KB Output is correct
37 Correct 6 ms 5356 KB Output is correct
38 Correct 6 ms 5504 KB Output is correct
39 Correct 6 ms 5356 KB Output is correct
40 Correct 7 ms 5356 KB Output is correct
41 Correct 6 ms 5368 KB Output is correct
42 Correct 6 ms 5356 KB Output is correct
43 Correct 6 ms 5356 KB Output is correct
44 Correct 6 ms 5356 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5228 KB Output is correct
2 Correct 4 ms 5100 KB Output is correct
3 Correct 4 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 4 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 5 ms 5376 KB Output is correct
11 Correct 4 ms 5100 KB Output is correct
12 Correct 4 ms 5100 KB Output is correct
13 Correct 4 ms 5100 KB Output is correct
14 Correct 4 ms 5100 KB Output is correct
15 Correct 4 ms 5100 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 4 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 4 ms 5100 KB Output is correct
21 Correct 4 ms 5100 KB Output is correct
22 Correct 4 ms 5100 KB Output is correct
23 Correct 6 ms 5356 KB Output is correct
24 Correct 7 ms 5356 KB Output is correct
25 Correct 7 ms 5356 KB Output is correct
26 Correct 6 ms 5356 KB Output is correct
27 Correct 6 ms 5356 KB Output is correct
28 Correct 6 ms 5356 KB Output is correct
29 Correct 5 ms 5356 KB Output is correct
30 Correct 6 ms 5356 KB Output is correct
31 Correct 6 ms 5356 KB Output is correct
32 Correct 6 ms 5356 KB Output is correct
33 Correct 6 ms 5356 KB Output is correct
34 Correct 6 ms 5484 KB Output is correct
35 Correct 6 ms 5356 KB Output is correct
36 Correct 5 ms 5356 KB Output is correct
37 Correct 6 ms 5356 KB Output is correct
38 Correct 6 ms 5504 KB Output is correct
39 Correct 6 ms 5356 KB Output is correct
40 Correct 7 ms 5356 KB Output is correct
41 Correct 6 ms 5368 KB Output is correct
42 Correct 6 ms 5356 KB Output is correct
43 Correct 6 ms 5356 KB Output is correct
44 Correct 6 ms 5356 KB Output is correct
45 Correct 375 ms 34796 KB Output is correct
46 Correct 364 ms 34284 KB Output is correct
47 Correct 367 ms 34796 KB Output is correct
48 Correct 374 ms 34540 KB Output is correct
49 Correct 383 ms 34084 KB Output is correct
50 Correct 362 ms 34028 KB Output is correct
51 Correct 370 ms 34156 KB Output is correct
52 Correct 379 ms 34836 KB Output is correct
53 Correct 353 ms 34412 KB Output is correct
54 Correct 455 ms 38252 KB Output is correct
55 Correct 467 ms 36972 KB Output is correct
56 Correct 476 ms 36204 KB Output is correct
57 Correct 424 ms 35820 KB Output is correct
58 Correct 340 ms 34028 KB Output is correct
59 Correct 337 ms 34028 KB Output is correct
60 Correct 231 ms 43500 KB Output is correct
61 Correct 269 ms 34284 KB Output is correct
62 Correct 547 ms 37976 KB Output is correct
63 Correct 247 ms 34180 KB Output is correct
64 Correct 265 ms 33672 KB Output is correct
65 Correct 526 ms 37996 KB Output is correct
66 Correct 256 ms 34284 KB Output is correct