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Submission #946638

# Submission time Handle Problem Language Result Execution time Memory
946638 2024-03-14T20:43:28 Z MilosMilutinovic JOI15_road_development (JOI15_road_development) C++14
100 / 100
 299 ms 27476 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,q,tot,T;
int t[300005],a[300005],b[300005],fa[300005],v[200005],nxt[200005],h[100005],dep[100005],p[100005][20],fenw[200005],dfn[100005],dfo[100005];
bool was[100005];

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;
}

int gfa(int x){return fa[x]==x?x:fa[x]=gfa(fa[x]);}

bool unite(int x,int y){
	x=gfa(x); y=gfa(y);
	if(x==y) return false;
	fa[y]=x;
	return true;
}

void dfs(int x,int f){
	dfn[x]=++T;
	dep[x]=dep[f]+1;
	p[x][0]=f;
	for(int i=1;i<20;i++) p[x][i]=p[p[x][i-1]][i-1];
	for(int p=h[x];p;p=nxt[p]){
		if(v[p]==f) continue;
		dfs(v[p],x);
	}
	dfo[x]=++T;
}

int lca(int x,int y){
	if(dep[x]>dep[y]) swap(x,y);
	for(int i=19;i>=0;i--) if(dep[p[y][i]]>=dep[x]) y=p[y][i];
	for(int i=19;i>=0;i--) if(p[x][i]!=p[y][i]) x=p[x][i],y=p[y][i];
	return x==y?x:p[x][0];
}

void change(int p,int x){
	for(;p<=200000;p+=p&-p) fenw[p]+=x;
}

int query(int p){
	int v=0;
	for(;p>=1;p-=p&-p) v+=fenw[p];
	return v;
}

int main(){
	n=readint(); q=readint();
	for(int i=1;i<=q;i++){
		t[i]=readint(); a[i]=readint(); b[i]=readint();
	}
	for(int i=1;i<=n;i++) fa[i]=i;
	for(int i=1;i<=q;i++){
		if(t[i]==2) continue;
		if(unite(a[i],b[i])){
			addedge(a[i],b[i]);
		}
	}
	for(int i=1;i<=n;i++) if(dep[i]==0) dfs(i,i);
	for(int i=1;i<=n;i++) fa[i]=i;
	for(int i=1;i<=q;i++){
		int l=lca(a[i],b[i]);
		if(t[i]==1){
			if(!unite(a[i],b[i])){
				for(int j=a[i];j!=l;j=p[j][0]){
					if(query(dfn[j])-query(dfn[l])==dep[j]-dep[l]){
						break;
					}
					int ver=j;
					for(int k=19;k>=0;k--){
						if(dep[p[ver][k]]>=dep[l]&&query(dfn[ver])-query(dfn[p[ver][k]])==dep[ver]-dep[p[ver][k]]) ver=p[ver][k];
					}
					if(ver==l) break;
					change(dfn[ver],+1);
					change(dfo[ver],-1);
					j=ver;
				}
				for(int j=b[i];j!=l;j=p[j][0]){
					if(query(dfn[j])-query(dfn[l])==dep[j]-dep[l]){
						break;
					}
					int ver=j;
					for(int k=19;k>=0;k--){
						if(dep[p[ver][k]]>=dep[l]&&query(dfn[ver])-query(dfn[p[ver][k]])==dep[ver]-dep[p[ver][k]]) ver=p[ver][k];
					}
					if(ver==l) break;
					change(dfn[ver],+1);
					change(dfo[ver],-1);
					j=ver;
				}
			}
			continue;
		}
		if(gfa(a[i])!=gfa(b[i])){
			printf("-1\n");
			continue;
		}
		printf("%d\n",dep[a[i]]+dep[b[i]]-2*dep[l]-(query(dfn[a[i]])+query(dfn[b[i]])-2*query(dfn[l])));
	}
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6600 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 3 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6596 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 155 ms 20920 KB Output is correct
2 Correct 186 ms 20908 KB Output is correct
3 Correct 224 ms 25504 KB Output is correct
4 Correct 268 ms 25708 KB Output is correct
5 Correct 252 ms 24128 KB Output is correct
6 Correct 230 ms 24272 KB Output is correct
7 Correct 161 ms 20988 KB Output is correct
8 Correct 219 ms 23892 KB Output is correct
9 Correct 136 ms 20564 KB Output is correct
10 Correct 267 ms 23356 KB Output is correct
11 Correct 215 ms 25048 KB Output is correct
12 Correct 216 ms 27164 KB Output is correct
13 Correct 198 ms 27476 KB Output is correct
14 Correct 215 ms 24692 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 137 ms 21076 KB Output is correct
2 Correct 179 ms 21080 KB Output is correct
3 Correct 215 ms 24404 KB Output is correct
4 Correct 239 ms 26100 KB Output is correct
5 Correct 145 ms 21076 KB Output is correct
6 Correct 222 ms 24556 KB Output is correct
7 Correct 145 ms 20876 KB Output is correct
8 Correct 232 ms 23564 KB Output is correct
9 Correct 218 ms 24040 KB Output is correct
10 Correct 200 ms 25428 KB Output is correct
11 Correct 122 ms 20568 KB Output is correct
12 Correct 259 ms 25528 KB Output is correct
13 Correct 190 ms 25940 KB Output is correct
14 Correct 167 ms 24908 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 93 ms 18516 KB Output is correct
2 Correct 120 ms 18748 KB Output is correct
3 Correct 167 ms 21844 KB Output is correct
4 Correct 202 ms 23272 KB Output is correct
5 Correct 161 ms 20636 KB Output is correct
6 Correct 223 ms 25284 KB Output is correct
7 Correct 73 ms 16684 KB Output is correct
8 Correct 105 ms 20408 KB Output is correct
9 Correct 116 ms 22304 KB Output is correct
10 Correct 93 ms 18780 KB Output is correct
11 Correct 211 ms 23556 KB Output is correct
12 Correct 208 ms 23828 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6600 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 3 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6596 KB Output is correct
9 Correct 155 ms 20920 KB Output is correct
10 Correct 186 ms 20908 KB Output is correct
11 Correct 224 ms 25504 KB Output is correct
12 Correct 268 ms 25708 KB Output is correct
13 Correct 252 ms 24128 KB Output is correct
14 Correct 230 ms 24272 KB Output is correct
15 Correct 161 ms 20988 KB Output is correct
16 Correct 219 ms 23892 KB Output is correct
17 Correct 136 ms 20564 KB Output is correct
18 Correct 267 ms 23356 KB Output is correct
19 Correct 215 ms 25048 KB Output is correct
20 Correct 216 ms 27164 KB Output is correct
21 Correct 198 ms 27476 KB Output is correct
22 Correct 215 ms 24692 KB Output is correct
23 Correct 137 ms 21076 KB Output is correct
24 Correct 179 ms 21080 KB Output is correct
25 Correct 215 ms 24404 KB Output is correct
26 Correct 239 ms 26100 KB Output is correct
27 Correct 145 ms 21076 KB Output is correct
28 Correct 222 ms 24556 KB Output is correct
29 Correct 145 ms 20876 KB Output is correct
30 Correct 232 ms 23564 KB Output is correct
31 Correct 218 ms 24040 KB Output is correct
32 Correct 200 ms 25428 KB Output is correct
33 Correct 122 ms 20568 KB Output is correct
34 Correct 259 ms 25528 KB Output is correct
35 Correct 190 ms 25940 KB Output is correct
36 Correct 167 ms 24908 KB Output is correct
37 Correct 93 ms 18516 KB Output is correct
38 Correct 120 ms 18748 KB Output is correct
39 Correct 167 ms 21844 KB Output is correct
40 Correct 202 ms 23272 KB Output is correct
41 Correct 161 ms 20636 KB Output is correct
42 Correct 223 ms 25284 KB Output is correct
43 Correct 73 ms 16684 KB Output is correct
44 Correct 105 ms 20408 KB Output is correct
45 Correct 116 ms 22304 KB Output is correct
46 Correct 93 ms 18780 KB Output is correct
47 Correct 211 ms 23556 KB Output is correct
48 Correct 208 ms 23828 KB Output is correct
49 Correct 139 ms 21076 KB Output is correct
50 Correct 200 ms 21112 KB Output is correct
51 Correct 227 ms 25176 KB Output is correct
52 Correct 270 ms 27272 KB Output is correct
53 Correct 127 ms 20076 KB Output is correct
54 Correct 122 ms 20308 KB Output is correct
55 Correct 211 ms 24148 KB Output is correct
56 Correct 268 ms 25700 KB Output is correct
57 Correct 299 ms 23892 KB Output is correct
58 Correct 233 ms 24228 KB Output is correct
59 Correct 223 ms 24148 KB Output is correct
60 Correct 219 ms 24916 KB Output is correct
61 Correct 205 ms 24924 KB Output is correct