Submission #302074

#	Time	Username	Problem	Language	Result	Execution time	Memory
302074		TMJN	Simurgh (IOI17_simurgh)	C++17	13 / 100	71 ms	512 KiB

simurgh

#include "simurgh.h"
#include <bits/stdc++.h>
using namespace std;

int N,T[10];
vector<int>U,V,res;
bool B[30];

int par(int x){
	if(T[x]==x)return x;
	return T[x]=par(T[x]);
}

void uni(int x,int y){
	x=par(x);
	y=par(y);
	T[x]=y;
}

void dfs(int x,int t){
	if(t==N-1){
		for(int i=0;i<N;i++){
			T[i]=i;
		}
		for(int i=0;i<U.size();i++){
			if(B[i]){
				uni(U[i],V[i]);
			}
		}
		bool f=true;
		for(int i=0;i<N-1;i++){
			if(par(i)!=par(i+1))f=false;
		}
		if(f){
			vector<int>v;
			for(int i=0;i<U.size();i++){
				if(B[i]){
					v.push_back(i);
				}
			}
			if(count_common_roads(v)==N-1){
				res=v;
			}
		}
	}
	else{
		for(int i=x;i<U.size();i++){
			B[i]=true;
			dfs(i+1,t+1);
			B[i]=false;
		}
	}
}

vector<int>find_roads(int n,vector<int>u,vector<int>v){
	N=n;
	U=u;
	V=v;
	dfs(0,0);
	return res;
}

Compilation message (stderr)

simurgh.cpp: In function 'void dfs(int, int)':
simurgh.cpp:25:16: 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<U.size();i++){
      |               ~^~~~~~~~~
simurgh.cpp:36:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |    for(int i=0;i<U.size();i++){
      |                ~^~~~~~~~~
simurgh.cpp:47:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for(int i=x;i<U.size();i++){
      |               ~^~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30