답안 #26400

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
26400 2017-06-29T20:26:08 Z WhipppedCream Fireworks (APIO16_fireworks) C++14
100 / 100
206 ms 50456 KB
/*
 * Author: Seokhwan Choi
 * Time Complexity: O((N+M) (log (N+M))^2 )
 */

#include<stdio.h>
#include<queue>
#define MAXN 300100
int n,m;
int p[MAXN];
int c[MAXN];
struct ndata{//contains data for subtree (y=f(x), where y is minimum cost when distance to all leaf node is x
	long long int a,b;//y=ax+b at large x
	std::priority_queue<long long int> *pq;//saves slope changing points, slope change by 1 at each element
	ndata operator+(ndata r){//merge two data by adding them
		ndata s;//result(merged data)
		s.a=a+r.a;
		s.b=b+r.b;
		if(pq->size()>r.pq->size()){//merge smaller priority queue to larger priority queue
			s.pq=pq;
			while(r.pq->size()!=0){
				s.pq->push(r.pq->top());
				r.pq->pop();
			}
		}
		else{
			s.pq=r.pq;
			while(pq->size()!=0){
				s.pq->push(pq->top());
				pq->pop();
			}
		}
		return s;
	}
};
ndata d[MAXN];
int main(){
	int i;
	scanf("%d%d",&n,&m);
	for(i=2;i<=n+m;i++){
		scanf("%d%d",&p[i],&c[i]);
	}
	for(i=n+m;i>0;i--){//initiallize
		d[i].a=0;
		d[i].b=0;
		d[i].pq=new std::priority_queue<long long>;
	}
	for(i=n+m;i>n;i--){//leaf nodes
		d[i].a=1;
		d[i].b=-c[i];
		d[i].pq->push(c[i]);//slope is -1 if x<c[i], 1 if x>c[i]
		d[i].pq->push(c[i]);//slope changes by 2
		d[p[i]]=d[p[i]]+d[i];//add the data to parent node
	}
	for(i=n;i>1;i--){
		//add edge to parent node
		while(d[i].a>1){//slope over 1 is useless because we can increase only one edge(edge toward parent node)
			d[i].a--;//slope decrease by 1
			d[i].b+=d[i].pq->top();//y=ax+b=(a-1)x+(b+x) at slope changing point
			d[i].pq->pop();
		}
		long long int ta=d[i].pq->top();//increase length of slope -1 part by c[i]
		d[i].pq->pop();
		long long int tb=d[i].pq->top();
		d[i].pq->pop();
		d[i].pq->push(tb+c[i]);//move location of slope 0, 1 part by c[i]
		d[i].pq->push(ta+c[i]);
		d[i].b-=c[i];//y is decreased by c[i] at sufficiently large x (slope 1 part)
		d[p[i]]=d[p[i]]+d[i];//add the data to parent node
	}
	while(d[1].a>0){//root node, y at slope 0 is the answer because it is minimum y
		d[1].a--;
		d[1].b+=d[1].pq->top();
		d[1].pq->pop();
	}
	printf("%lld\n",d[1].b);
	return 0;
}

Compilation message

fireworks.cpp: In function 'int main()':
fireworks.cpp:39:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
fireworks.cpp:41:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&p[i],&c[i]);
                            ^
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 10552 KB Output is correct
2 Correct 0 ms 10552 KB Output is correct
3 Correct 0 ms 10552 KB Output is correct
4 Correct 0 ms 10552 KB Output is correct
5 Correct 0 ms 10552 KB Output is correct
6 Correct 0 ms 10552 KB Output is correct
7 Correct 0 ms 10552 KB Output is correct
8 Correct 0 ms 10552 KB Output is correct
9 Correct 0 ms 10552 KB Output is correct
10 Correct 0 ms 10552 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 10552 KB Output is correct
2 Correct 0 ms 10552 KB Output is correct
3 Correct 0 ms 10552 KB Output is correct
4 Correct 0 ms 10552 KB Output is correct
5 Correct 0 ms 10552 KB Output is correct
6 Correct 0 ms 10552 KB Output is correct
7 Correct 0 ms 10552 KB Output is correct
8 Correct 0 ms 10552 KB Output is correct
9 Correct 0 ms 10552 KB Output is correct
10 Correct 0 ms 10552 KB Output is correct
11 Correct 0 ms 10552 KB Output is correct
12 Correct 0 ms 10552 KB Output is correct
13 Correct 0 ms 10552 KB Output is correct
14 Correct 0 ms 10552 KB Output is correct
15 Correct 0 ms 10552 KB Output is correct
16 Correct 0 ms 10552 KB Output is correct
17 Correct 0 ms 10552 KB Output is correct
18 Correct 0 ms 10552 KB Output is correct
19 Correct 0 ms 10552 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 10552 KB Output is correct
2 Correct 0 ms 10552 KB Output is correct
3 Correct 0 ms 10552 KB Output is correct
4 Correct 0 ms 10552 KB Output is correct
5 Correct 0 ms 10552 KB Output is correct
6 Correct 0 ms 10552 KB Output is correct
7 Correct 0 ms 10552 KB Output is correct
8 Correct 0 ms 10552 KB Output is correct
9 Correct 0 ms 10552 KB Output is correct
10 Correct 0 ms 10552 KB Output is correct
11 Correct 0 ms 10552 KB Output is correct
12 Correct 0 ms 10552 KB Output is correct
13 Correct 0 ms 10552 KB Output is correct
14 Correct 0 ms 10552 KB Output is correct
15 Correct 0 ms 10552 KB Output is correct
16 Correct 0 ms 10552 KB Output is correct
17 Correct 0 ms 10552 KB Output is correct
18 Correct 0 ms 10552 KB Output is correct
19 Correct 0 ms 10552 KB Output is correct
20 Correct 0 ms 10552 KB Output is correct
21 Correct 0 ms 10552 KB Output is correct
22 Correct 0 ms 10552 KB Output is correct
23 Correct 0 ms 10552 KB Output is correct
24 Correct 0 ms 10552 KB Output is correct
25 Correct 0 ms 10552 KB Output is correct
26 Correct 0 ms 10552 KB Output is correct
27 Correct 0 ms 10552 KB Output is correct
28 Correct 0 ms 10552 KB Output is correct
29 Correct 0 ms 10552 KB Output is correct
30 Correct 0 ms 10552 KB Output is correct
31 Correct 0 ms 10684 KB Output is correct
32 Correct 0 ms 10684 KB Output is correct
33 Correct 0 ms 10684 KB Output is correct
34 Correct 0 ms 10816 KB Output is correct
35 Correct 0 ms 10816 KB Output is correct
36 Correct 3 ms 10960 KB Output is correct
37 Correct 3 ms 10948 KB Output is correct
38 Correct 0 ms 10948 KB Output is correct
39 Correct 3 ms 10948 KB Output is correct
40 Correct 0 ms 10816 KB Output is correct
41 Correct 0 ms 10816 KB Output is correct
42 Correct 0 ms 10816 KB Output is correct
43 Correct 3 ms 10948 KB Output is correct
44 Correct 3 ms 10948 KB Output is correct
45 Correct 0 ms 10948 KB Output is correct
46 Correct 3 ms 11252 KB Output is correct
47 Correct 3 ms 11272 KB Output is correct
48 Correct 0 ms 11092 KB Output is correct
49 Correct 3 ms 11216 KB Output is correct
50 Correct 0 ms 10988 KB Output is correct
51 Correct 0 ms 10984 KB Output is correct
52 Correct 0 ms 11136 KB Output is correct
53 Correct 3 ms 11092 KB Output is correct
54 Correct 3 ms 11080 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 10552 KB Output is correct
2 Correct 0 ms 10552 KB Output is correct
3 Correct 0 ms 10552 KB Output is correct
4 Correct 0 ms 10552 KB Output is correct
5 Correct 0 ms 10552 KB Output is correct
6 Correct 0 ms 10552 KB Output is correct
7 Correct 0 ms 10552 KB Output is correct
8 Correct 0 ms 10552 KB Output is correct
9 Correct 0 ms 10552 KB Output is correct
10 Correct 0 ms 10552 KB Output is correct
11 Correct 0 ms 10552 KB Output is correct
12 Correct 0 ms 10552 KB Output is correct
13 Correct 0 ms 10552 KB Output is correct
14 Correct 0 ms 10552 KB Output is correct
15 Correct 0 ms 10552 KB Output is correct
16 Correct 0 ms 10552 KB Output is correct
17 Correct 0 ms 10552 KB Output is correct
18 Correct 0 ms 10552 KB Output is correct
19 Correct 0 ms 10552 KB Output is correct
20 Correct 0 ms 10552 KB Output is correct
21 Correct 0 ms 10552 KB Output is correct
22 Correct 0 ms 10552 KB Output is correct
23 Correct 0 ms 10552 KB Output is correct
24 Correct 0 ms 10552 KB Output is correct
25 Correct 0 ms 10552 KB Output is correct
26 Correct 0 ms 10552 KB Output is correct
27 Correct 0 ms 10552 KB Output is correct
28 Correct 0 ms 10552 KB Output is correct
29 Correct 0 ms 10552 KB Output is correct
30 Correct 0 ms 10552 KB Output is correct
31 Correct 0 ms 10684 KB Output is correct
32 Correct 0 ms 10684 KB Output is correct
33 Correct 0 ms 10684 KB Output is correct
34 Correct 0 ms 10816 KB Output is correct
35 Correct 0 ms 10816 KB Output is correct
36 Correct 3 ms 10960 KB Output is correct
37 Correct 3 ms 10948 KB Output is correct
38 Correct 0 ms 10948 KB Output is correct
39 Correct 3 ms 10948 KB Output is correct
40 Correct 0 ms 10816 KB Output is correct
41 Correct 0 ms 10816 KB Output is correct
42 Correct 0 ms 10816 KB Output is correct
43 Correct 3 ms 10948 KB Output is correct
44 Correct 3 ms 10948 KB Output is correct
45 Correct 0 ms 10948 KB Output is correct
46 Correct 3 ms 11252 KB Output is correct
47 Correct 3 ms 11272 KB Output is correct
48 Correct 0 ms 11092 KB Output is correct
49 Correct 3 ms 11216 KB Output is correct
50 Correct 0 ms 10988 KB Output is correct
51 Correct 0 ms 10984 KB Output is correct
52 Correct 0 ms 11136 KB Output is correct
53 Correct 3 ms 11092 KB Output is correct
54 Correct 3 ms 11080 KB Output is correct
55 Correct 6 ms 11608 KB Output is correct
56 Correct 29 ms 14860 KB Output is correct
57 Correct 56 ms 17748 KB Output is correct
58 Correct 66 ms 19856 KB Output is correct
59 Correct 89 ms 22948 KB Output is correct
60 Correct 116 ms 25624 KB Output is correct
61 Correct 143 ms 28476 KB Output is correct
62 Correct 153 ms 30176 KB Output is correct
63 Correct 183 ms 33620 KB Output is correct
64 Correct 193 ms 34400 KB Output is correct
65 Correct 93 ms 24676 KB Output is correct
66 Correct 79 ms 24676 KB Output is correct
67 Correct 113 ms 24676 KB Output is correct
68 Correct 163 ms 32456 KB Output is correct
69 Correct 183 ms 33096 KB Output is correct
70 Correct 153 ms 33092 KB Output is correct
71 Correct 193 ms 50456 KB Output is correct
72 Correct 206 ms 50284 KB Output is correct
73 Correct 169 ms 46452 KB Output is correct
74 Correct 189 ms 47136 KB Output is correct
75 Correct 183 ms 47004 KB Output is correct
76 Correct 189 ms 47060 KB Output is correct
77 Correct 196 ms 46676 KB Output is correct
78 Correct 193 ms 45676 KB Output is correct
79 Correct 173 ms 45068 KB Output is correct