Submission #29113

#	Time	Username	Problem	Language	Result	Execution time	Memory
29113		dereotu	Crocodile's Underground City (IOI11_crocodile)	C++14	46 / 100	389 ms	262144 KiB

crocodile

#include "crocodile.h"
#include <bits/stdc++.h>
#define pii pair<int,int>
#define mp make_pair
#define pb push_back
#define st first
#define nd second
#define forr(i,A,B) for(int i=A;i<B;++i)
#define space ' '
#define endl '\n'
#define LL long long
#define exit adsjdsa
using namespace std;

vector < pair<int,int> > adj[1005];
int exit[1005];
int cycle[1005];
int nodes[1005];
int neighbour[1005];
void dfs(int x,int y){
	int best=1e9,secondbest=1e9;
	if(exit[x]){
		nodes[x]=0;
		return;
	}
	if(cycle[x] and neighbour[x]>=2){
		forr(i,0,adj[x].size()){
			if(adj[x][i].nd!=y and (!cycle[adj[x][i].nd] or neighbour[adj[x][i].nd]>=2)){
				dfs(adj[x][i].nd,x);
			}
		}
		forr(i,0,adj[x].size()){
			//cout<<"geziş "<<x<<space<<adj[x][i].nd<<space<<exit[adj[x][i].nd]<<endl;
			if(exit[adj[x][i].nd]){
				//cout<<adj[x][i].st<<endl;
				if(adj[x][i].st<best){
					secondbest=best;
					best=adj[x][i].st;
				}
				else if(adj[x][i].st<secondbest){
					secondbest=adj[x][i].st;
				}
			}
			else if(neighbour[adj[x][i].nd]>=2 or !cycle[adj[x][i].nd]){
				if(adj[x][i].nd!=y and adj[x][i].st+nodes[adj[x][i].nd]<best){
					secondbest=best;
					best=adj[x][i].st+nodes[adj[x][i].nd];
				}
				else if(adj[x][i].nd!=y and adj[x][i].st+nodes[adj[x][i].nd]<secondbest){
					secondbest=adj[x][i].st+nodes[adj[x][i].nd];
				}
			}
		}
		nodes[x]=secondbest;
		return;
	}
	else if(cycle[x] and neighbour[x]<2){
		nodes[x]=1e9;
		return;
	}
	forr(i,0,adj[x].size()){
		if(adj[x][i].nd!=y){
			dfs(adj[x][i].nd,x);
		}
	}
	forr(i,0,adj[x].size()){
		if(adj[x][i].nd!=y and adj[x][i].st+nodes[adj[x][i].nd]<best){
			secondbest=best;
			best=adj[x][i].st+nodes[adj[x][i].nd];
		}
		else if(adj[x][i].nd!=y and adj[x][i].st+nodes[adj[x][i].nd]<secondbest){
			secondbest=adj[x][i].st+nodes[adj[x][i].nd];
		}
	}
	nodes[x]=secondbest;
}

int visited[1005];

void cycle_detect(int x,int y){
	if(visited[x]){
		cycle[x]=1;
		return;
	}
	visited[x]=1;
	forr(i,0,adj[x].size()){
		if(adj[x][i].nd!=y){
			cycle_detect(adj[x][i].nd,x);
		}
	}
}

void neighbour_calc(int x){
	visited[x]=1;
	forr(i,0,adj[x].size()){
		if(!visited[adj[x][i].nd]){
			neighbour_calc(adj[x][i].nd);
		}
		if(neighbour[adj[x][i].nd]>=2) neighbour[x]++;
		if(exit[adj[x][i].nd]) neighbour[x]++;
	}
}
int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){
	forr(i,0,M){
		adj[R[i][0]].pb(mp(L[i],R[i][1]));
		adj[R[i][1]].pb(mp(L[i],R[i][0]));
	}
	forr(i,0,K){
		exit[P[i]]=1;
	}
	forr(i,0,N){
		memset(visited,0,sizeof visited);
		cycle_detect(i,-1);
	}
	memset(visited,0,sizeof visited);
	neighbour_calc(0);
	dfs(0,-1);
	int ans=nodes[0];
	return ans;
}

Compilation message (stderr)

crocodile.cpp: In function 'void dfs(int, int)':
crocodile.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define forr(i,A,B) for(int i=A;i<B;++i)
                                  ^
crocodile.cpp:27:3: note: in expansion of macro 'forr'
   forr(i,0,adj[x].size()){
   ^
crocodile.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define forr(i,A,B) for(int i=A;i<B;++i)
                                  ^
crocodile.cpp:32:3: note: in expansion of macro 'forr'
   forr(i,0,adj[x].size()){
   ^
crocodile.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define forr(i,A,B) for(int i=A;i<B;++i)
                                  ^
crocodile.cpp:61:2: note: in expansion of macro 'forr'
  forr(i,0,adj[x].size()){
  ^
crocodile.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define forr(i,A,B) for(int i=A;i<B;++i)
                                  ^
crocodile.cpp:66:2: note: in expansion of macro 'forr'
  forr(i,0,adj[x].size()){
  ^
crocodile.cpp: In function 'void cycle_detect(int, int)':
crocodile.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define forr(i,A,B) for(int i=A;i<B;++i)
                                  ^
crocodile.cpp:86:2: note: in expansion of macro 'forr'
  forr(i,0,adj[x].size()){
  ^
crocodile.cpp: In function 'void neighbour_calc(int)':
crocodile.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define forr(i,A,B) for(int i=A;i<B;++i)
                                  ^
crocodile.cpp:95:2: note: in expansion of macro 'forr'
  forr(i,0,adj[x].size()){
  ^

• Subtask 1: 46 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11