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답안 #921427

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
921427 2024-02-03T20:17:51 Z MilosMilutinovic 철도 요금 (JOI16_ho_t3) C++14
100 / 100
 151 ms 36712 KB 
#include<bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
 
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
 
ll readint(){
	ll x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

int n,m,q,tot,res;
int x[200005],y[200005],h[100005],nxt[400005],v[400005],d[100005],du[100005];
bool rem[100005],edg[400005];

void addedge(int x,int y){
	v[++tot]=y; nxt[tot]=h[x]; h[x]=tot;
	v[++tot]=x; nxt[tot]=h[y]; h[y]=tot;
}

void bfs(){
	for(int i=1;i<=n;i++) d[i]=-1;
	d[1]=0;
	queue<int> que;
	que.push(1);
	while(!que.empty()){
		int x=que.front();
		que.pop();
		for(int p=h[x];p;p=nxt[p]){
			if(d[v[p]]==-1){
				d[v[p]]=d[x]+1;
				que.push(v[p]);
			}
		}
	}
}

void work(int x){
	if(x==1||rem[x]) return;
	res++;
	rem[x]=true;
	for(int p=h[x];p;p=nxt[p]){
		if(d[v[p]]>d[x]&&!edg[p]){
			edg[p]=true;
			du[v[p]]--;
			if(du[v[p]]==0) work(v[p]);
		}
	}
}

int main(){
	n=readint();
	m=readint();
	q=readint();
	for(int i=1;i<=m;i++){
		x[i]=readint();
		y[i]=readint();
		addedge(x[i],y[i]);
	}
	bfs();
	map<pii,int> idx;
	for(int i=1;i<=n;i++){
		for(int p=h[i];p;p=nxt[p]){
			idx[mp(i,v[p])]=p;
		}
	}
	for(int i=1;i<=n;i++){
		for(int p=h[i];p;p=nxt[p]){
			if(d[v[p]]<d[i]) du[i]++;
		}
	}
	for(int i=2;i<=n;i++) if(du[i]==0) work(i);
	while(q--){
		int i=readint();
		if(d[x[i]]==d[y[i]]){
			printf("%d\n",res);
			continue;
		}
		if(d[x[i]]>d[y[i]]) swap(x[i],y[i]);
		if(rem[x[i]]){
			printf("%d\n",res);
			continue;
		}
		edg[idx[mp(x[i],y[i])]]=true;
		du[y[i]]--;
		if(du[y[i]]==0) work(y[i]);
		printf("%d\n",res);
	}
	return 0;
}

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 3 ms 7260 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6600 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 3 ms 7260 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6600 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 87 ms 33876 KB Output is correct
10 Correct 79 ms 33972 KB Output is correct
11 Correct 85 ms 33824 KB Output is correct
12 Correct 90 ms 33976 KB Output is correct
13 Correct 74 ms 33876 KB Output is correct
14 Correct 71 ms 33560 KB Output is correct
15 Correct 48 ms 27220 KB Output is correct
16 Correct 43 ms 20552 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 75 ms 34128 KB Output is correct
2 Correct 78 ms 33940 KB Output is correct
3 Correct 82 ms 26996 KB Output is correct
4 Correct 82 ms 33952 KB Output is correct
5 Correct 70 ms 33568 KB Output is correct
6 Correct 74 ms 33364 KB Output is correct
7 Correct 32 ms 20564 KB Output is correct
8 Correct 44 ms 20308 KB Output is correct
9 Correct 40 ms 18116 KB Output is correct
10 Correct 41 ms 17848 KB Output is correct
11 Correct 134 ms 33136 KB Output is correct
12 Correct 110 ms 32340 KB Output is correct
13 Correct 106 ms 31604 KB Output is correct
14 Correct 120 ms 34500 KB Output is correct
15 Correct 114 ms 31312 KB Output is correct
16 Correct 109 ms 30544 KB Output is correct
17 Correct 84 ms 33604 KB Output is correct
18 Correct 68 ms 27824 KB Output is correct
19 Correct 119 ms 36412 KB Output is correct
20 Correct 88 ms 34128 KB Output is correct
21 Correct 53 ms 24144 KB Output is correct
22 Correct 52 ms 23892 KB Output is correct

Subtask #4
39.0 / 39.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 3 ms 7260 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6600 KB Output is correct
8 Correct 1 ms 6488 KB Output is correct
9 Correct 87 ms 33876 KB Output is correct
10 Correct 79 ms 33972 KB Output is correct
11 Correct 85 ms 33824 KB Output is correct
12 Correct 90 ms 33976 KB Output is correct
13 Correct 74 ms 33876 KB Output is correct
14 Correct 71 ms 33560 KB Output is correct
15 Correct 48 ms 27220 KB Output is correct
16 Correct 43 ms 20552 KB Output is correct
17 Correct 75 ms 34128 KB Output is correct
18 Correct 78 ms 33940 KB Output is correct
19 Correct 82 ms 26996 KB Output is correct
20 Correct 82 ms 33952 KB Output is correct
21 Correct 70 ms 33568 KB Output is correct
22 Correct 74 ms 33364 KB Output is correct
23 Correct 32 ms 20564 KB Output is correct
24 Correct 44 ms 20308 KB Output is correct
25 Correct 40 ms 18116 KB Output is correct
26 Correct 41 ms 17848 KB Output is correct
27 Correct 134 ms 33136 KB Output is correct
28 Correct 110 ms 32340 KB Output is correct
29 Correct 106 ms 31604 KB Output is correct
30 Correct 120 ms 34500 KB Output is correct
31 Correct 114 ms 31312 KB Output is correct
32 Correct 109 ms 30544 KB Output is correct
33 Correct 84 ms 33604 KB Output is correct
34 Correct 68 ms 27824 KB Output is correct
35 Correct 119 ms 36412 KB Output is correct
36 Correct 88 ms 34128 KB Output is correct
37 Correct 53 ms 24144 KB Output is correct
38 Correct 52 ms 23892 KB Output is correct
39 Correct 136 ms 36392 KB Output is correct
40 Correct 151 ms 36524 KB Output is correct
41 Correct 109 ms 28488 KB Output is correct
42 Correct 120 ms 36712 KB Output is correct
43 Correct 132 ms 36556 KB Output is correct
44 Correct 131 ms 35924 KB Output is correct
45 Correct 123 ms 35876 KB Output is correct
46 Correct 54 ms 26116 KB Output is correct
47 Correct 62 ms 21840 KB Output is correct
48 Correct 71 ms 21588 KB Output is correct
49 Correct 80 ms 19164 KB Output is correct
50 Correct 72 ms 19044 KB Output is correct
51 Correct 68 ms 20308 KB Output is correct
52 Correct 82 ms 20088 KB Output is correct
53 Correct 66 ms 19024 KB Output is correct
54 Correct 103 ms 19092 KB Output is correct