oj.uz

Submission #116498

# Submission time Handle Problem Language Result Execution time Memory
116498 2019-06-12T15:54:52 Z tinjyu Highway Tolls (IOI18_highway) C++14
5 / 100
 253 ms 12552 KB 
#include "highway.h"
#include <iostream>
using namespace std;

unsigned long long int 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;
		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;
	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(father[map[g][0]][0]==-2)
			{
				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];
			}
		}
		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;
		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:65:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(father[map[g][0]][0]==-2)
       ~~~~~~~~~~~~~~~~~~~~^~~~
highway.cpp:79:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<=tree[0][0];i++)
              ~^~~~~~~~~~~~
highway.cpp:106:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(tmp==cnt)
      ~~~^~~~~
highway.cpp:113:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1;i<=tree[0][1];i++)
              ~^~~~~~~~~~~~
highway.cpp:144:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(tmp==cnt)
      ~~~^~~~~
highway.cpp:152:8: warning: 'endans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  answer(startans,endans);
  ~~~~~~^~~~~~~~~~~~~~~~~
highway.cpp:152:8: 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 376 KB Output is correct
2 Correct 2 ms 432 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 352 KB Output is correct
5 Correct 2 ms 248 KB Output is correct
6 Correct 2 ms 292 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 352 KB Output is correct
12 Correct 2 ms 376 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 30 ms 1420 KB Output is correct
3 Correct 195 ms 10608 KB Output is correct
4 Correct 191 ms 10668 KB Output is correct
5 Correct 196 ms 10596 KB Output is correct
6 Correct 160 ms 10608 KB Output is correct
7 Correct 163 ms 10596 KB Output is correct
8 Correct 190 ms 10612 KB Output is correct
9 Correct 162 ms 10620 KB Output is correct
10 Correct 217 ms 10600 KB Output is correct
11 Correct 229 ms 10032 KB Output is correct
12 Correct 197 ms 10324 KB Output is correct
13 Correct 212 ms 10664 KB Output is correct
14 Incorrect 253 ms 10604 KB Output is incorrect: {s, t} is wrong.

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 1416 KB Output is correct
2 Correct 35 ms 2588 KB Output is correct
3 Correct 72 ms 3948 KB Output is correct
4 Correct 169 ms 10164 KB Output is correct
5 Correct 175 ms 10088 KB Output is correct
6 Correct 187 ms 10352 KB Output is correct
7 Correct 134 ms 10648 KB Output is correct
8 Correct 193 ms 10284 KB Output is correct
9 Incorrect 110 ms 10592 KB Output is incorrect: {s, t} is wrong.

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 440 KB Output is correct
2 Correct 16 ms 1392 KB Output is correct
3 Correct 126 ms 8344 KB Output is correct
4 Correct 190 ms 10608 KB Output is correct
5 Correct 142 ms 10600 KB Output is correct
6 Correct 173 ms 10640 KB Output is correct
7 Correct 175 ms 10720 KB Output is correct
8 Correct 151 ms 10608 KB Output is correct
9 Runtime error 151 ms 12552 KB Execution killed with signal 11 (could be triggered by violating memory limits)
10 Halted 0 ms 0 KB -

Subtask #5
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 1448 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 47 ms 1464 KB Output is incorrect: {s, t} is wrong.
2 Halted 0 ms 0 KB -