oj.uz

Submission #603062

# Submission time Handle Problem Language Result Execution time Memory
603062 2022-07-23T14:40:47 Z Koosha_mv Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 661376 KB 
#include "walk.h"
#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,int(v.size())) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first

const int N=2e6+99;
const ll inf=1e16;

int n,m,cnt,seg[N],vis[N];
ll dist[N];
vector<int> a,h,vec;
vector<int> V[N];
vector<pair<ll,ll>> g[N];
map<pair<int,int>,int> mark;

int get(int x,int y){
	if(mark.count(mp(x,y))) return mark[mp(x,y)];
	int p=lower_bound(all(a),x)-a.begin();
	V[p].pb(y);
	return mark[mp(x,y)]=++cnt;
}
void build(int id=1,int l=0,int r=n){
	if(l+1==r){
		seg[id]=h[l];
		return ;
	}
	int mid=(l+r)>>1;
	build(id<<1,l,mid);
	build(id<<1|1,mid,r);
	seg[id]=max(seg[id<<1],seg[id<<1|1]);
}
void get(int L,int R,int val,int id=1,int l=0,int r=n){
	if(r<=L || R<=l || seg[id]<val) return ;
	if(l+1==r){
		vec.pb(l);
		return ;
	}
	int mid=(l+r)>>1;
	get(L,R,val,id<<1,l,mid);
	get(L,R,val,id<<1|1,mid,r);
}

ll min_distance(vector<int> _a,vector<int> _h,vector<int> l,vector<int> r,vector<int> y,int S,int T) {
	a=_a,h=_h;
	n=a.size(),m=l.size();
	build();
	get(a[S],0);
	get(a[T],0);
	f(i,0,m){
		vec.clear();
		get(l[i],r[i]+1,y[i]);
		f(j,1,vec.size()){
			int u=get(a[vec[j-1]],y[i]),v=get(a[vec[j]],y[i]);
			g[u].pb({v,a[vec[j]]-a[vec[j-1]]});
			g[v].pb({u,a[vec[j]]-a[vec[j-1]]});
		}
		//dbgv(vec);
	}
	f(i,0,n){
		sort(all(V[i]));
		f(j,1,V[i].size()){
			int u=get(a[i],V[i][j-1]),v=get(a[i],V[i][j]);
			g[u].pb({v,V[i][j]-V[i][j-1]});
			g[v].pb({u,V[i][j]-V[i][j-1]});
		}
	}
	set<pair<int,int>> s;
	f(i,1,cnt+1) dist[i]=inf;
	dist[get(a[S],0)]=0;
	f(i,1,cnt+1) s.insert({dist[i],i});
	while(s.size()){
		int u=(*s.begin()).S;
		s.erase(*s.begin());
		//if(vis[u]) assert(0);
		vis[u]=1;
		for(auto [v,w] : g[u]){
			if(w<0) assert(0);
			if(dist[u]+w<dist[v]){
				if(vis[v]==1){
					if(dist[v]<dist[u]) assert(0);
				}
				s.erase({dist[v],v});
				dist[v]=dist[u]+w;
				//if(vis[v]) assert(0);
				s.insert({dist[v],v});
			}
		}
	}
	if(dist[get(a[T],0)]<inf){
		return dist[get(a[T],0)];
	}
	else{
		return -1;
	}
}
/*
5 3
0 6
4 6
5 6
6 6
9 6
3 4 1
1 3 3
0 2 6
0 4

0, 4, 5, 6, 9],
[6, 6, 6, 6, 6],
[3, 1, 0],
[4, 3, 2],
[1, 3, 6],
0, 4)
*/

Compilation message

walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:9:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   70 |   f(j,1,vec.size()){
      |     ~~~~~~~~~~~~~~             
walk.cpp:70:3: note: in expansion of macro 'f'
   70 |   f(j,1,vec.size()){
      |   ^
walk.cpp:9:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   79 |   f(j,1,V[i].size()){
      |     ~~~~~~~~~~~~~~~            
walk.cpp:79:3: note: in expansion of macro 'f'
   79 |   f(j,1,V[i].size()){
      |   ^
walk.cpp:94:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   94 |   for(auto [v,w] : g[u]){
      |            ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 94228 KB Output is correct
2 Correct 43 ms 94132 KB Output is correct
3 Correct 48 ms 94352 KB Output is correct
4 Correct 43 ms 94220 KB Output is correct
5 Correct 44 ms 94284 KB Output is correct
6 Correct 45 ms 94332 KB Output is correct
7 Correct 43 ms 94236 KB Output is correct
8 Correct 44 ms 94276 KB Output is correct
9 Correct 42 ms 94244 KB Output is correct
10 Correct 45 ms 94420 KB Output is correct
11 Correct 46 ms 94284 KB Output is correct
12 Correct 43 ms 94248 KB Output is correct
13 Correct 43 ms 94272 KB Output is correct
14 Correct 44 ms 94248 KB Output is correct
15 Correct 44 ms 94156 KB Output is correct
16 Correct 44 ms 94244 KB Output is correct
17 Correct 44 ms 94368 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 94248 KB Output is correct
2 Correct 44 ms 94156 KB Output is correct
3 Correct 2406 ms 242800 KB Output is correct
4 Execution timed out 4049 ms 245772 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 231 ms 108664 KB Output is correct
2 Runtime error 2106 ms 661376 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 231 ms 108664 KB Output is correct
2 Runtime error 2106 ms 661376 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 94228 KB Output is correct
2 Correct 43 ms 94132 KB Output is correct
3 Correct 48 ms 94352 KB Output is correct
4 Correct 43 ms 94220 KB Output is correct
5 Correct 44 ms 94284 KB Output is correct
6 Correct 45 ms 94332 KB Output is correct
7 Correct 43 ms 94236 KB Output is correct
8 Correct 44 ms 94276 KB Output is correct
9 Correct 42 ms 94244 KB Output is correct
10 Correct 45 ms 94420 KB Output is correct
11 Correct 46 ms 94284 KB Output is correct
12 Correct 43 ms 94248 KB Output is correct
13 Correct 43 ms 94272 KB Output is correct
14 Correct 44 ms 94248 KB Output is correct
15 Correct 44 ms 94156 KB Output is correct
16 Correct 44 ms 94244 KB Output is correct
17 Correct 44 ms 94368 KB Output is correct
18 Correct 44 ms 94248 KB Output is correct
19 Correct 44 ms 94156 KB Output is correct
20 Correct 2406 ms 242800 KB Output is correct
21 Execution timed out 4049 ms 245772 KB Time limit exceeded
22 Halted 0 ms 0 KB -