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Submission #39361

# Submission time Handle Problem Language Result Execution time Memory
39361 2018-01-12T14:53:00 Z Filyan Fireworks (APIO16_fireworks) C++14
100 / 100
 759 ms 137812 KB 
#include<iostream>
#include<algorithm>
#include<vector>
#include<set>

using namespace std;

#define sz(x) (int)(x.size())
#define fi(a,b) for(int i=a;i<b;++i)
#define fj(a,b) for(int j=a;j<b;++j)
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair<int, int> pii;
/////////////////////////

int const N = 3e5 + 41;

int n, m;
vector<pii> e[N];
ll ans;

struct Fun{
	multiset<ll> l, r;
	ll addl, addr;
	ll ans;

	Fun(){
		addl = addr = ans = 0;
	};

	Fun(int c){
		addl = addr = ans = 0;
		l.insert(c);
		r.insert(c);
	}

	int getq(){
		return sz(l) + sz(r);
	}

	ll getleftmostmin(){
		ll x = (*l.rbegin());
		return x + addl;
	}

	ll getrightmostmin(){
		ll x = (*r.begin());
		return x + addr;
	}

	ll extractleftmostmin(){
		ll x = (*l.rbegin());
		l.erase(l.find(x));
		return x + addl;
	}

	ll extractrightmostmin(){
		ll x = (*r.begin());
		r.erase(r.begin());
		return x + addr;
	}

	void pushrightpoint(ll x){
		if(x >= getleftmostmin()){
			r.insert(x - addr);
		}else{
			ll lx = extractleftmostmin();
			ans += lx - x;
			l.insert(x - addl);
			r.insert(lx - addr);
		}
	}

	void pushright(multiset<ll> &rp, ll addright){
		for(ll x : rp){
			pushrightpoint(x + addright);
		}
	}

	void pushleftpoint(ll x){
		if(x <= getrightmostmin()){
			l.insert(x - addl);
		}else{
			ll rx = extractrightmostmin();
			ans += x - rx;
			l.insert(rx - addl);
			r.insert(x - addr);
		}
	}

	void pushleft(multiset<ll> &lp, ll addleft){
		for(ll x : lp){
			pushleftpoint(x + addleft);
		}
	}

	void shift(ll s){
		addr += s;
		addl += s;
		ll lx = extractleftmostmin();
		addl -= s;
		l.insert(lx - addl);
	}

	void relax(){
		while(sz(r) > 1){
			ll x = (*r.rbegin());
			r.erase(r.find(x));
		}
	}
};

Fun *f[N];

void dfs(int x, int p = -1, int c = 0){
	if(x >= n){
		f[x] = new Fun(c);
		return;
	}
	f[x] = new Fun();
	int id = x;
	for(pii e : ::e[x]){
		int y = e.first;
		if(y == p) continue;
		int c = e.second;
		dfs(y, x, c);
		if(f[x]->getq() < f[y]->getq()){
			f[x] = f[y];
			id = y;
		}
	}
	for(pii e : ::e[x]){
		int y = e.first;
		int c = e.second;
		if(y == id) continue;
		if(y == p) continue;
		f[x]->ans += f[y]->ans;
		f[x]->pushleft(f[y]->l, f[y]->addl);
		f[x]->pushright(f[y]->r, f[y]->addr);
	}

	if(p != -1){
		f[x]->shift(c);
		f[x]->relax();
	}
	//cerr << x << " " << f[x]->ans << endl;
}

void solve(){
	fi(0, n) f[i] = new Fun();
	dfs(0);
	ans = f[0]->ans;
}

int main(){
#ifdef _DEBUG
	freopen("input.txt","r",stdin);
	freopen("output.txt","w",stdout);
#endif

	scanf("%d %d",&n,&m);
	fi(1, n+m){
		int p, c;
		scanf("%d %d",&p,&c);
		--p;
		e[p].pb(mp(i, c));
		e[i].pb(mp(p, c));
	}

	solve();

	printf("%lld\n",ans);

	return 0;
}

Compilation message

fireworks.cpp: In function 'void dfs(int, int, int)':
fireworks.cpp:135:7: warning: unused variable 'c' [-Wunused-variable]
   int c = e.second;
       ^
fireworks.cpp: In function 'int main()':
fireworks.cpp:162:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
                      ^
fireworks.cpp:165:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&p,&c);
                       ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 11396 KB Output is correct
2 Correct 3 ms 11396 KB Output is correct
3 Correct 3 ms 11396 KB Output is correct
4 Correct 3 ms 11396 KB Output is correct
5 Correct 0 ms 11396 KB Output is correct
6 Correct 3 ms 11396 KB Output is correct
7 Correct 3 ms 11396 KB Output is correct
8 Correct 0 ms 11396 KB Output is correct
9 Correct 0 ms 11396 KB Output is correct
10 Correct 3 ms 11396 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 11396 KB Output is correct
2 Correct 3 ms 11396 KB Output is correct
3 Correct 6 ms 11396 KB Output is correct
4 Correct 0 ms 11396 KB Output is correct
5 Correct 6 ms 11396 KB Output is correct
6 Correct 3 ms 11396 KB Output is correct
7 Correct 6 ms 11396 KB Output is correct
8 Correct 0 ms 11528 KB Output is correct
9 Correct 3 ms 11528 KB Output is correct
10 Correct 0 ms 11528 KB Output is correct
11 Correct 3 ms 11528 KB Output is correct
12 Correct 6 ms 11528 KB Output is correct
13 Correct 3 ms 11528 KB Output is correct
14 Correct 0 ms 11528 KB Output is correct
15 Correct 0 ms 11528 KB Output is correct
16 Correct 0 ms 11528 KB Output is correct
17 Correct 6 ms 11528 KB Output is correct
18 Correct 0 ms 11528 KB Output is correct
19 Correct 0 ms 11528 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 11396 KB Output is correct
2 Correct 3 ms 11396 KB Output is correct
3 Correct 3 ms 11396 KB Output is correct
4 Correct 3 ms 11396 KB Output is correct
5 Correct 0 ms 11396 KB Output is correct
6 Correct 3 ms 11396 KB Output is correct
7 Correct 3 ms 11396 KB Output is correct
8 Correct 0 ms 11396 KB Output is correct
9 Correct 0 ms 11396 KB Output is correct
10 Correct 3 ms 11396 KB Output is correct
11 Correct 0 ms 11396 KB Output is correct
12 Correct 3 ms 11396 KB Output is correct
13 Correct 6 ms 11396 KB Output is correct
14 Correct 0 ms 11396 KB Output is correct
15 Correct 6 ms 11396 KB Output is correct
16 Correct 3 ms 11396 KB Output is correct
17 Correct 6 ms 11396 KB Output is correct
18 Correct 0 ms 11528 KB Output is correct
19 Correct 3 ms 11528 KB Output is correct
20 Correct 0 ms 11528 KB Output is correct
21 Correct 3 ms 11528 KB Output is correct
22 Correct 6 ms 11528 KB Output is correct
23 Correct 3 ms 11528 KB Output is correct
24 Correct 0 ms 11528 KB Output is correct
25 Correct 0 ms 11528 KB Output is correct
26 Correct 0 ms 11528 KB Output is correct
27 Correct 6 ms 11528 KB Output is correct
28 Correct 0 ms 11528 KB Output is correct
29 Correct 0 ms 11528 KB Output is correct
30 Correct 3 ms 11528 KB Output is correct
31 Correct 3 ms 11792 KB Output is correct
32 Correct 0 ms 11924 KB Output is correct
33 Correct 6 ms 12188 KB Output is correct
34 Correct 3 ms 12320 KB Output is correct
35 Correct 6 ms 12584 KB Output is correct
36 Correct 9 ms 12716 KB Output is correct
37 Correct 6 ms 12980 KB Output is correct
38 Correct 3 ms 12980 KB Output is correct
39 Correct 6 ms 12980 KB Output is correct
40 Correct 0 ms 13428 KB Output is correct
41 Correct 3 ms 13428 KB Output is correct
42 Correct 6 ms 12848 KB Output is correct
43 Correct 3 ms 13076 KB Output is correct
44 Correct 6 ms 12968 KB Output is correct
45 Correct 6 ms 12968 KB Output is correct
46 Correct 6 ms 13244 KB Output is correct
47 Correct 6 ms 13112 KB Output is correct
48 Correct 6 ms 12980 KB Output is correct
49 Correct 6 ms 13112 KB Output is correct
50 Correct 3 ms 12852 KB Output is correct
51 Correct 13 ms 12852 KB Output is correct
52 Correct 3 ms 12852 KB Output is correct
53 Correct 6 ms 12988 KB Output is correct
54 Correct 9 ms 13148 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 11396 KB Output is correct
2 Correct 3 ms 11396 KB Output is correct
3 Correct 3 ms 11396 KB Output is correct
4 Correct 3 ms 11396 KB Output is correct
5 Correct 0 ms 11396 KB Output is correct
6 Correct 3 ms 11396 KB Output is correct
7 Correct 3 ms 11396 KB Output is correct
8 Correct 0 ms 11396 KB Output is correct
9 Correct 0 ms 11396 KB Output is correct
10 Correct 3 ms 11396 KB Output is correct
11 Correct 0 ms 11396 KB Output is correct
12 Correct 3 ms 11396 KB Output is correct
13 Correct 6 ms 11396 KB Output is correct
14 Correct 0 ms 11396 KB Output is correct
15 Correct 6 ms 11396 KB Output is correct
16 Correct 3 ms 11396 KB Output is correct
17 Correct 6 ms 11396 KB Output is correct
18 Correct 0 ms 11528 KB Output is correct
19 Correct 3 ms 11528 KB Output is correct
20 Correct 0 ms 11528 KB Output is correct
21 Correct 3 ms 11528 KB Output is correct
22 Correct 6 ms 11528 KB Output is correct
23 Correct 3 ms 11528 KB Output is correct
24 Correct 0 ms 11528 KB Output is correct
25 Correct 0 ms 11528 KB Output is correct
26 Correct 0 ms 11528 KB Output is correct
27 Correct 6 ms 11528 KB Output is correct
28 Correct 0 ms 11528 KB Output is correct
29 Correct 0 ms 11528 KB Output is correct
30 Correct 3 ms 11528 KB Output is correct
31 Correct 3 ms 11792 KB Output is correct
32 Correct 0 ms 11924 KB Output is correct
33 Correct 6 ms 12188 KB Output is correct
34 Correct 3 ms 12320 KB Output is correct
35 Correct 6 ms 12584 KB Output is correct
36 Correct 9 ms 12716 KB Output is correct
37 Correct 6 ms 12980 KB Output is correct
38 Correct 3 ms 12980 KB Output is correct
39 Correct 6 ms 12980 KB Output is correct
40 Correct 0 ms 13428 KB Output is correct
41 Correct 3 ms 13428 KB Output is correct
42 Correct 6 ms 12848 KB Output is correct
43 Correct 3 ms 13076 KB Output is correct
44 Correct 6 ms 12968 KB Output is correct
45 Correct 6 ms 12968 KB Output is correct
46 Correct 6 ms 13244 KB Output is correct
47 Correct 6 ms 13112 KB Output is correct
48 Correct 6 ms 12980 KB Output is correct
49 Correct 6 ms 13112 KB Output is correct
50 Correct 3 ms 12852 KB Output is correct
51 Correct 13 ms 12852 KB Output is correct
52 Correct 3 ms 12852 KB Output is correct
53 Correct 6 ms 12988 KB Output is correct
54 Correct 9 ms 13148 KB Output is correct
55 Correct 19 ms 15752 KB Output is correct
56 Correct 89 ms 27896 KB Output is correct
57 Correct 119 ms 39908 KB Output is correct
58 Correct 166 ms 47960 KB Output is correct
59 Correct 189 ms 60128 KB Output is correct
60 Correct 306 ms 72380 KB Output is correct
61 Correct 336 ms 80728 KB Output is correct
62 Correct 356 ms 88372 KB Output is correct
63 Correct 459 ms 104192 KB Output is correct
64 Correct 456 ms 107812 KB Output is correct
65 Correct 223 ms 137812 KB Output is correct
66 Correct 186 ms 137808 KB Output is correct
67 Correct 246 ms 95876 KB Output is correct
68 Correct 366 ms 121460 KB Output is correct
69 Correct 466 ms 117820 KB Output is correct
70 Correct 516 ms 117816 KB Output is correct
71 Correct 563 ms 130328 KB Output is correct
72 Correct 579 ms 130328 KB Output is correct
73 Correct 566 ms 117692 KB Output is correct
74 Correct 583 ms 117680 KB Output is correct
75 Correct 589 ms 117344 KB Output is correct
76 Correct 466 ms 117720 KB Output is correct
77 Correct 553 ms 115048 KB Output is correct
78 Correct 616 ms 112512 KB Output is correct
79 Correct 759 ms 118624 KB Output is correct