oj.uz

Submission #347378

# Submission time Handle Problem Language Result Execution time Memory
347378 2021-01-12T16:33:05 Z cheetose JOI15_road_development (JOI15_road_development) C++17
100 / 100
 863 ms 26092 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define y0 y12
#define y1 y22
#define INF 1987654321
#define PI 3.141592653589793238462643383279502884
#define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
#define fdn(i,a,b,c) for(int (i)=(a);(i)>=(b);(i)-=(c))
#define MEM0(a) memset((a),0,sizeof(a))
#define MEM_1(a) memset((a),-1,sizeof(a))
#define ALL(a) a.begin(),a.end()
#define COMPRESS(a) sort(ALL(a));a.resize(unique(ALL(a))-a.begin())
#define SYNC ios_base::sync_with_stdio(false);cin.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef double db;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int, int> Pi;
typedef pair<ll, ll> Pll;
typedef pair<db, db> Pd;
typedef vector<int> Vi;
typedef vector<ll> Vll;
typedef vector<double> Vd;
typedef vector<Pi> VPi;
typedef vector<Pll> VPll;
typedef vector<Pd> VPd;
typedef tuple<int, int, int> iii;
typedef tuple<int,int,int,int> iiii;
typedef tuple<ll, ll, ll> LLL;
typedef vector<iii> Viii;
typedef vector<LLL> VLLL;
typedef complex<double> base;
const int MOD = 1000000007;
ll POW(ll a, ll b, ll MMM=MOD) {ll ret=1; for(;b;b>>=1,a=(a*a)%MMM)if(b&1)ret=(ret*a)% MMM; return ret; }
int dx[] = { 0,1,0,-1,1,1,-1,-1 }, dy[] = { 1,0,-1,0,1,-1,1,-1 };
int ddx[]={2,2,-2,-2,1,1,-1,-1},ddy[]={1,-1,1,-1,2,-2,2,-2};

Vi v[100001];
int p[100001];
int find(int x){
	if(p[x]==x)return x;
	return p[x]=find(p[x]);
}
void merge(int x,int y){
	x=find(x),y=find(y);
	if(x!=y)p[x]=y;
}
int tree[262144],lazy[262144],hld[100001],cnt[100001],num[100001],idx[100001],parent[100001],depth[100001],cc;
void init(int node,int S, int E){
	if(S==E){
		tree[node]=1;
		return;
	}
	init(node*2,S,(S+E)/2);
	init(node*2+1,(S+E)/2+1,E);
	tree[node]=tree[node*2]+tree[node*2+1];
}
void propagation(int node,int S,int E){
	if(lazy[node]){
		tree[node]=0;
		if(S!=E){
			lazy[node*2]=1;
			lazy[node*2+1]=1;
		}
		lazy[node]=0;
	}
}
void upd(int node, int S, int E, int i, int j)
{
	propagation(node, S, E);
	if (i > E || j < S) return;
	if (j >= E && i <= S)
	{
		lazy[node] = 1;
		propagation(node, S, E);
		return;
	}
	upd(2 * node, S, (S + E) / 2, i, j);
	upd(2 * node + 1, (S + E) / 2 + 1, E, i, j);
	tree[node] = tree[2 * node] + tree[2 * node + 1];
}

int find(int node, int S, int E, int i, int j)
{
	propagation(node, S, E);
	if (i > E || j < S)return 0;
	if (i <= S && j >= E)return tree[node];
	return find(node * 2, S, (S + E) / 2, i, j)+ find(node * 2 + 1, (S + E) / 2 + 1, E, i, j);
}
void dfs(int N,int p,int d)
{
	parent[N]=p;
	depth[N]=d;
	cnt[N]=1;
	for(int next:v[N])
	{
		if(next==p)continue;
		dfs(next,N,d+1);
		cnt[N]+=cnt[next];
	}
}
void HLD(int N,int p)
{
	int c=-1;
	num[N]=++cc;
	idx[num[N]]=N;
	for(int next:v[N])
	{
		if(next==p)continue;
		if(c==-1 || cnt[next]>cnt[c])c=next;
	}
	if(c!=-1)
	{
		hld[c]=hld[N];
		HLD(c,N);
	}
	for(int next:v[N])
	{
		if(next==p || next==c)continue;
		hld[next]=next;
		HLD(next,N);
	}
}
int n,q;
void upd(int x,int y){
	while(hld[x]!=hld[y])
	{
		if(depth[hld[x]]>depth[hld[y]])
		{
			upd(1,1,n,num[hld[x]],num[x]);
			x=parent[hld[x]];
		}
		else
		{
			upd(1,1,n,num[hld[y]],num[y]);
			y=parent[hld[y]];
		}
	}
	if(depth[x]>depth[y])swap(x,y);
	upd(1,1,n,num[x]+1,num[y]);
}
int query(int x,int y)
{
	int res=0;
	while(hld[x]!=hld[y])
	{
		if(depth[hld[x]]>depth[hld[y]])
		{
			res+=find(1,1,n,num[hld[x]],num[x]);
			x=parent[hld[x]];
		}
		else
		{
			res+=find(1,1,n,num[hld[y]],num[y]);
			y=parent[hld[y]];
		}
	}
	if(depth[x]>depth[y])swap(x,y);
	res+=find(1,1,n,num[x]+1,num[y]);
	return res;
}
iii Q[300000];
int main() {
	scanf("%d%d",&n,&q);
	iota(p,p+n+1,0);
	fup(i,0,q-1,1){
		int t,x,y;
		scanf("%d%d%d",&t,&x,&y);
		Q[i]=iii(t,x,y);
		if(t==1){
			if(find(x)!=find(y)){
			v[x].pb(y);
			v[y].pb(x);
			}
			merge(x,y);
		}
	}
	fup(i,1,n,1){
		if(!num[i]){
			dfs(i,-1,0);
			hld[i]=i;
			HLD(i,-1);
		}
	}
	init(1,1,n);
	iota(p,p+n+1,0);
	fup(i,0,q-1,1){
		auto [t,x,y]=Q[i];
		if(t==1){
			if(find(x)==find(y)){
				upd(x,y);
			}
			merge(x,y);
		}else{
			if(find(x)!=find(y)){
				puts("-1");
				continue;
			}
			printf("%d\n",query(x,y));
		}
	}
}

Compilation message

road_development.cpp: In function 'int main()':
road_development.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
road_development.cpp:171:2: note: in expansion of macro 'fup'
  171 |  fup(i,0,q-1,1){
      |  ^~~
road_development.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
road_development.cpp:183:2: note: in expansion of macro 'fup'
  183 |  fup(i,1,n,1){
      |  ^~~
road_development.cpp:10:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fup(i,a,b,c) for(int (i)=(a);(i)<=(b);(i)+=(c))
      |                              ^
road_development.cpp:192:2: note: in expansion of macro 'fup'
  192 |  fup(i,0,q-1,1){
      |  ^~~
road_development.cpp:169:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  169 |  scanf("%d%d",&n,&q);
      |  ~~~~~^~~~~~~~~~~~~~
road_development.cpp:173:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  173 |   scanf("%d%d%d",&t,&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2796 KB Output is correct
2 Correct 5 ms 2796 KB Output is correct
3 Correct 4 ms 2924 KB Output is correct
4 Correct 4 ms 2924 KB Output is correct
5 Correct 5 ms 2796 KB Output is correct
6 Correct 4 ms 2924 KB Output is correct
7 Correct 5 ms 2796 KB Output is correct
8 Correct 4 ms 2924 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 362 ms 14564 KB Output is correct
2 Correct 863 ms 14572 KB Output is correct
3 Correct 353 ms 20076 KB Output is correct
4 Correct 392 ms 20204 KB Output is correct
5 Correct 405 ms 18284 KB Output is correct
6 Correct 348 ms 18540 KB Output is correct
7 Correct 640 ms 14512 KB Output is correct
8 Correct 356 ms 18156 KB Output is correct
9 Correct 648 ms 14444 KB Output is correct
10 Correct 324 ms 17388 KB Output is correct
11 Correct 302 ms 19564 KB Output is correct
12 Correct 291 ms 21868 KB Output is correct
13 Correct 306 ms 22508 KB Output is correct
14 Correct 325 ms 19052 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 399 ms 14436 KB Output is correct
2 Correct 589 ms 18540 KB Output is correct
3 Correct 432 ms 22668 KB Output is correct
4 Correct 344 ms 24940 KB Output is correct
5 Correct 365 ms 18540 KB Output is correct
6 Correct 444 ms 22764 KB Output is correct
7 Correct 373 ms 18404 KB Output is correct
8 Correct 408 ms 21868 KB Output is correct
9 Correct 359 ms 22124 KB Output is correct
10 Correct 377 ms 23916 KB Output is correct
11 Correct 344 ms 18280 KB Output is correct
12 Correct 374 ms 24044 KB Output is correct
13 Correct 357 ms 24300 KB Output is correct
14 Correct 280 ms 23020 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 258 ms 13284 KB Output is correct
2 Correct 470 ms 13036 KB Output is correct
3 Correct 282 ms 16852 KB Output is correct
4 Correct 254 ms 18540 KB Output is correct
5 Correct 795 ms 14188 KB Output is correct
6 Correct 405 ms 19820 KB Output is correct
7 Correct 83 ms 11788 KB Output is correct
8 Correct 91 ms 17772 KB Output is correct
9 Correct 110 ms 20204 KB Output is correct
10 Correct 186 ms 15972 KB Output is correct
11 Correct 351 ms 21252 KB Output is correct
12 Correct 416 ms 21996 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 2796 KB Output is correct
2 Correct 5 ms 2796 KB Output is correct
3 Correct 4 ms 2924 KB Output is correct
4 Correct 4 ms 2924 KB Output is correct
5 Correct 5 ms 2796 KB Output is correct
6 Correct 4 ms 2924 KB Output is correct
7 Correct 5 ms 2796 KB Output is correct
8 Correct 4 ms 2924 KB Output is correct
9 Correct 362 ms 14564 KB Output is correct
10 Correct 863 ms 14572 KB Output is correct
11 Correct 353 ms 20076 KB Output is correct
12 Correct 392 ms 20204 KB Output is correct
13 Correct 405 ms 18284 KB Output is correct
14 Correct 348 ms 18540 KB Output is correct
15 Correct 640 ms 14512 KB Output is correct
16 Correct 356 ms 18156 KB Output is correct
17 Correct 648 ms 14444 KB Output is correct
18 Correct 324 ms 17388 KB Output is correct
19 Correct 302 ms 19564 KB Output is correct
20 Correct 291 ms 21868 KB Output is correct
21 Correct 306 ms 22508 KB Output is correct
22 Correct 325 ms 19052 KB Output is correct
23 Correct 399 ms 14436 KB Output is correct
24 Correct 589 ms 18540 KB Output is correct
25 Correct 432 ms 22668 KB Output is correct
26 Correct 344 ms 24940 KB Output is correct
27 Correct 365 ms 18540 KB Output is correct
28 Correct 444 ms 22764 KB Output is correct
29 Correct 373 ms 18404 KB Output is correct
30 Correct 408 ms 21868 KB Output is correct
31 Correct 359 ms 22124 KB Output is correct
32 Correct 377 ms 23916 KB Output is correct
33 Correct 344 ms 18280 KB Output is correct
34 Correct 374 ms 24044 KB Output is correct
35 Correct 357 ms 24300 KB Output is correct
36 Correct 280 ms 23020 KB Output is correct
37 Correct 258 ms 13284 KB Output is correct
38 Correct 470 ms 13036 KB Output is correct
39 Correct 282 ms 16852 KB Output is correct
40 Correct 254 ms 18540 KB Output is correct
41 Correct 795 ms 14188 KB Output is correct
42 Correct 405 ms 19820 KB Output is correct
43 Correct 83 ms 11788 KB Output is correct
44 Correct 91 ms 17772 KB Output is correct
45 Correct 110 ms 20204 KB Output is correct
46 Correct 186 ms 15972 KB Output is correct
47 Correct 351 ms 21252 KB Output is correct
48 Correct 416 ms 21996 KB Output is correct
49 Correct 371 ms 18696 KB Output is correct
50 Correct 719 ms 18540 KB Output is correct
51 Correct 406 ms 23788 KB Output is correct
52 Correct 374 ms 26092 KB Output is correct
53 Correct 366 ms 17380 KB Output is correct
54 Correct 334 ms 17588 KB Output is correct
55 Correct 358 ms 22408 KB Output is correct
56 Correct 306 ms 23992 KB Output is correct
57 Correct 367 ms 22124 KB Output is correct
58 Correct 432 ms 21868 KB Output is correct
59 Correct 327 ms 22252 KB Output is correct
60 Correct 295 ms 23276 KB Output is correct
61 Correct 292 ms 23316 KB Output is correct