Submission #293642

#	Time	Username	Problem	Language	Result	Execution time	Memory
293642		Dovran	Highway Tolls (IOI18_highway)	C++11	0 / 100	17 ms	5888 KiB

highway

#include <bits/stdc++.h>
#include "highway.h"
#define N 200009
#define pii pair <int, int>
#define ff first
#define ss second
#define pb push_back
#define ll long long

using namespace std;

int n, m, l[N];
vector<int>e[N];

void f(int nd, int lv){
	l[nd]=lv;

	for(int i=0; i<e[nd].size(); i++)
		if(!l[e[nd][i]] and e[nd][i]>0) f(e[nd][i], lv+1);
}

void find_pair(int NN, std::vector<int>u, std::vector<int>v, int a, int b){
	n=NN;
	m=u.size();
	vector<int>asd;
	for(int i=0; i<m; i++){
		e[u[i]].pb(v[i]);
		e[v[i]].pb(u[i]);
		
		asd.pb(0);
	}
	if(a>b)
		swap(a, b);
	
	ll x=ask(asd);
	x=x/a;
	
	f(0, 0);
	for(int i=0; i<n; i++){
		if(l[i]==x){
			answer(0, i);
			return;
		}
	}
}

Compilation message (stderr)

highway.cpp: In function 'void f(int, int)':
highway.cpp:18:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for(int i=0; i<e[nd].size(); i++)
      |               ~^~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 6
• Subtask 4: 0 / 33
• Subtask 5: 0 / 18
• Subtask 6: 0 / 31