Submission #647490

#	Time	Username	Problem	Language	Result	Execution time	Memory
647490		LucaIlie	Speedrun (RMI21_speedrun)	C++17	0 / 100	284 ms	740 KiB

speedrun

#include "speedrun.h"
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 1000;
const int MAX_LOG_N = 10;

vector <int> edges[MAX_N + 1];

void setHints( int crt, int child, int bro, int parent ) {
	for ( int b = 0; b < MAX_LOG_N; b++ )
		setHint( crt, b + 1, (child >> b) & 1 );
	for ( int b = 0; b < MAX_LOG_N; b++ )
		setHint( crt, b + 1 + MAX_LOG_N, (bro >> b) & 1 );
	for ( int b = 0; b < MAX_LOG_N; b++ )
		setHint( crt, b + 1 + 2 * MAX_LOG_N, (parent >> b) & 1 );
}

void dfsAssignHints( int crt, int bro, int parent ) {
	int i = 0;
	while ( i < edges[crt].size() && edges[crt][i] == parent )
		i++;
	setHints( crt, (i < edges[crt].size() ? edges[crt][i] : 0), bro, parent );
	for ( int i = 0; i < edges[crt].size(); i++ ) {
		if ( edges[crt][i] != parent )
			dfsAssignHints( edges[crt][i], (i + 1 < edges[crt].size() ? edges[crt][i + 1] : 0), crt );
	}
}

void assignHints( int subtask, int n, int a[], int b[] ) {
	for ( int i = 1; i <= n - 1; i++ ) {
		edges[a[i]].push_back( b[i] );
		edges[b[i]].push_back( a[i] );
	}

	setHintLen( 3 * MAX_LOG_N );
	dfsAssignHints( 1, 0, 0 );
}

bool visited[MAX_N + 1];

void getHints( int crt, int &child, int &bro, int &parent ) {
	child = 0;
	for ( int b = 0; b < MAX_LOG_N; b++ )
		child += (getHint( b + 1 ) << b);
	bro = 0;
	for ( int b = 0; b < MAX_LOG_N; b++ )
		bro += (getHint( b + 1 + MAX_LOG_N ) << b);
	parent = 0;
	for ( int b = 0; b < MAX_LOG_N; b++ )
		parent += (getHint( b + 1 + 2 * MAX_LOG_N ) << b);
}

void dfsSpeedrun( int crt ) {
	int child, bro, parent;

	visited[crt] = true;

	getHints( crt, child, bro, parent );
	if ( !visited[child] && goTo( child ) ) {
		dfsSpeedrun( child );
		goTo( crt );
	}
	if ( !visited[parent] && goTo( parent ) ) {
		dfsSpeedrun( parent );
		goTo( crt );
	}
	if ( !visited[bro] && goTo( parent ) ) {
		if ( goTo( bro ) ) {
			dfsSpeedrun( bro );
			goTo( parent );
		}
		goTo( crt );
	}
}

void speedrun( int subtask, int n, int start ) {
	visited[start] = true;
	dfsSpeedrun( start );
}

Compilation message (stderr)

speedrun.cpp: In function 'void dfsAssignHints(int, int, int)':
speedrun.cpp:22:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  while ( i < edges[crt].size() && edges[crt][i] == parent )
      |          ~~^~~~~~~~~~~~~~~~~~~
speedrun.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  setHints( crt, (i < edges[crt].size() ? edges[crt][i] : 0), bro, parent );
      |                  ~~^~~~~~~~~~~~~~~~~~~
speedrun.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for ( int i = 0; i < edges[crt].size(); i++ ) {
      |                   ~~^~~~~~~~~~~~~~~~~~~
speedrun.cpp:27:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |    dfsAssignHints( edges[crt][i], (i + 1 < edges[crt].size() ? edges[crt][i + 1] : 0), crt );
      |                                    ~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 21
• Subtask 2: 0 / 8
• Subtask 3: 0 / 19
• Subtask 4: 0 / 12
• Subtask 5: 0 / 40