oj.uz

Submission #116502

# Submission time Handle Problem Language Result Execution time Memory
116502 2019-06-12T15:59:00 Z tinjyu Highway Tolls (IOI18_highway) C++14
51 / 100
 260 ms 11480 KB 
#include "highway.h"
#include <iostream>
using namespace std;

unsigned long long int tag[90005],tree[900005][2],t[1000005][2],father[900005][2],cnt,road[900005],map[2600005][2],m,p[1300005];
long long int check()
{
	vector<int> w(m);
	for(int i=0;i<m;i++)w[i]=p[i];
	for(int i=0;i<m;i++)p[i]=1;
	return ask(w);
}
void find_pair(int n,vector<int> u,vector<int> v,int a, int b) {
	m=u.size();
	for(int i=0;i<n;i++)road[i]=-1;
	for(int i=0;i<m;i++)
	{
		int x=u[i],y=v[i];
		map[i*2][0]=x;
		map[i*2][1]=road[y];
		road[y]=i*2;
		map[i*2+1][0]=y;
		map[i*2+1][1]=road[x];
		road[x]=i*2+1;
	}
	for(int i=0;i<m;i++)p[i]=1;
	cnt=check();
	//cout<<cnt<<endl;
	int point;
	int l=0,r=m-1;
	while(l<=r)
	{
		int mid=(l+r)/2;
		for(int i=l;i<=mid;i++)p[i]=0;
		long long int tmp=check();
		if(tmp<cnt)
		{
			r=mid-1;
			point=mid;
		}
		else l=mid+1;
	}
	long long int start=u[point];
	long long int end=v[point];
	int tp=1,tpp=2;
	t[1][0]=start;
	t[1][1]=0;
	t[2][0]=end;
	t[2][1]=1;
	tree[0][0]++;
	tree[0][1]++;
	tree[1][0]=start;
	tree[1][1]=end;
	tag[start]=1;
	tag[end]=1;
	for(int i=0;i<n;i++)father[i][0]=-2;
	father[start][0]=-1;
	father[start][1]=130000;
	father[end][0]=-1;
	father[end][1]=130000;
	while(tp<=tpp)
	{
		int now=t[tp][0];
		int g=road[now];
		while(g!=-1)
		{
			if(tag[map[g][0]]==0)
			{
				tag[map[g][0]]=1;
				father[map[g][0]][0]=now;
				father[map[g][0]][1]=g/2;
				tpp++;
				t[tpp][0]=map[g][0];
				t[tpp][1]=t[tp][1];
				tree[0][t[tp][1]]++;
				tree[tree[0][t[tp][1]]][t[tp][1]]=map[g][0];
			}
			g=map[g][1];
		}
		tp++;
	}
	for(int i=1;i<=tree[0][0];i++)
	{
		int g=tree[i][0];
		//cout<<tree[i][0]<<" "; 
		while(p[father[g][1]]==1)
		{
			p[father[g][1]]=0;
			g=father[g][0];
		}
	}
	//cout<<endl;
	cnt=check();
	l=1,r=tree[0][0];
	int startans;
	while(l<=r)
	{
		int mid=(l+r)/2;
		for(int i=l;i<=mid;i++)
		{
			int g=tree[i][0];
			while(p[father[g][1]]==1)
			{
				p[father[g][1]]=0;
				g=father[g][0];
			}
		}
		long long int tmp=check();
		if(tmp==cnt)
		{
			startans=tree[mid][0];
			r=mid-1;
		}
		else l=mid+1;
	}
	for(int i=1;i<=tree[0][1];i++)
	{
		int g=tree[i][1];
		while(p[father[g][1]]==1)
		{
			p[father[g][1]]=0;
			g=father[g][0];
		}
	}
	//cout<<endl;
	cnt=check();
	//cout<<cnt<<endl;
	l=1,r=tree[0][1];
	int endans;
	while(l<=r)
	{
		int mid=(l+r)/2;
		//cout<<l<<" "<<r<<endl;
		for(int i=l;i<=mid;i++)
		{
			int g=tree[i][1];
			while(p[father[g][1]]==1)
			{
				//cout<<father[g][1]<<" ";
				p[father[g][1]]=0;
				g=father[g][0];
			}
		}
		//cout<<endl;
		long long int tmp=check();
		//cout<<tmp<<endl;
		if(tmp==cnt)
		{
			endans=tree[mid][1];
			r=mid-1;
		}
		else l=mid+1;
	}
	//cout<<startans<<" "<<endans<<endl;
	answer(startans,endans);
}

Compilation message

highway.cpp: In function 'long long int check()':
highway.cpp:9:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<m;i++)w[i]=p[i];
              ~^~
highway.cpp:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<m;i++)p[i]=1;
              ~^~
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<m;i++)
              ~^~
highway.cpp:26:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<m;i++)p[i]=1;
              ~^~
highway.cpp:36:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(tmp<cnt)
      ~~~^~~~
highway.cpp:82:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<=tree[0][0];i++)
              ~^~~~~~~~~~~~
highway.cpp:109:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(tmp==cnt)
      ~~~^~~~~
highway.cpp:116:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<=tree[0][1];i++)
              ~^~~~~~~~~~~~
highway.cpp:147:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(tmp==cnt)
      ~~~^~~~~
highway.cpp:155:8: warning: 'endans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  answer(startans,endans);
  ~~~~~~^~~~~~~~~~~~~~~~~
highway.cpp:155:8: warning: 'startans' may be used uninitialized in this function [-Wmaybe-uninitialized]
highway.cpp:43:29: warning: 'point' may be used uninitialized in this function [-Wmaybe-uninitialized]
  long long int start=u[point];
                             ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 356 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 352 KB Output is correct
7 Correct 2 ms 296 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 352 KB Output is correct
12 Correct 3 ms 376 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 488 KB Output is correct
2 Correct 16 ms 1528 KB Output is correct
3 Correct 193 ms 11328 KB Output is correct
4 Correct 170 ms 11396 KB Output is correct
5 Correct 179 ms 11300 KB Output is correct
6 Correct 190 ms 11304 KB Output is correct
7 Correct 169 ms 11300 KB Output is correct
8 Correct 199 ms 11340 KB Output is correct
9 Correct 183 ms 11388 KB Output is correct
10 Correct 145 ms 11296 KB Output is correct
11 Correct 202 ms 10720 KB Output is correct
12 Correct 234 ms 11056 KB Output is correct
13 Correct 168 ms 11260 KB Output is correct
14 Correct 166 ms 11300 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 1528 KB Output is correct
2 Correct 35 ms 2748 KB Output is correct
3 Correct 28 ms 4008 KB Output is correct
4 Correct 177 ms 10852 KB Output is correct
5 Correct 147 ms 10776 KB Output is correct
6 Correct 217 ms 11136 KB Output is correct
7 Correct 176 ms 11336 KB Output is correct
8 Correct 126 ms 10904 KB Output is correct
9 Correct 174 ms 10952 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 408 KB Output is correct
2 Correct 18 ms 1424 KB Output is correct
3 Correct 128 ms 9016 KB Output is correct
4 Correct 167 ms 11372 KB Output is correct
5 Correct 171 ms 11480 KB Output is correct
6 Correct 145 ms 11408 KB Output is correct
7 Correct 166 ms 11364 KB Output is correct
8 Correct 172 ms 11300 KB Output is correct
9 Correct 194 ms 11216 KB Output is correct
10 Correct 174 ms 11276 KB Output is correct
11 Correct 221 ms 11388 KB Output is correct
12 Correct 230 ms 11112 KB Output is correct
13 Correct 260 ms 11068 KB Output is correct
14 Correct 217 ms 10840 KB Output is correct
15 Correct 186 ms 11316 KB Output is correct
16 Correct 165 ms 11316 KB Output is correct
17 Correct 249 ms 11316 KB Output is correct
18 Correct 199 ms 11252 KB Output is correct
19 Correct 163 ms 11400 KB Output is correct
20 Correct 185 ms 11296 KB Output is correct
21 Correct 209 ms 11324 KB Output is correct
22 Correct 157 ms 11308 KB Output is correct
23 Correct 188 ms 10616 KB Output is correct
24 Correct 197 ms 10656 KB Output is correct
25 Correct 257 ms 11284 KB Output is correct

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 25 ms 1584 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -

Subtask #6
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 21 ms 1608 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -