Submission #133484

#	Time	Username	Problem	Language	Result	Execution time	Memory
133484		DanerZein	Shortcut (IOI16_shortcut)	C++14	0 / 100	2 ms	256 KiB

shortcut

#include "shortcut.h"
#include <bits/stdc++.h>
#define MAX 100000000
using namespace std;
typedef pair<int,int> ii;
typedef vector<ii> vi;
vector<vi>G;
int ml;
vector<int>dist(200);

void bfs(int u){
  //memset(dist,1000,sizeof (dist));
  dist[u]=0;
  vector<int>vis(ml,0);
  queue<int>q;
  q.push(u);
  vis[u]=1;
  while(!q.empty()){
    int v=q.front();
    q.pop();
    vis[v]=0;
    for(int i=0;i<G[v].size();i++){
      //    cout<<dist[v]<<endl;
      if(dist[v]+G[v][i].second<dist[G[v][i].first]){
	//cout<<i<<endl;
	dist[G[v][i].first]=dist[v]+G[v][i].second;
	if(vis[G[v][i].first]==0){
	  q.push(G[v][i].first);
	  vis[G[v][i].first]=1;
	}
      }
    }
  }
}
long long find_shortcut(int n, std::vector<int> l, std::vector<int> d, int c){
 
  ml=n;
  G.resize(2*n);
  for(int i=0;i<l.size();i++){
    G[i+1].push_back(ii(i,l[i]));
    G[i].push_back(ii(i+1,l[i]));
  }
  for(int i=0;i<d.size();i++){
    if(d[i]!=0){
      G[i+n].push_back(ii(i,d[i]));
      G[i].push_back(ii(i+n,d[i]));
    }
  }
  int mi=MAX;
  for(int i=0;i<n;i++){
    for(int j=i+1;j<n;j++){
      G[i].push_back(ii(j,c));
      G[j].push_back(ii(i,c));
      fill(dist.begin(),dist.end(),MAX);
      bfs(0);
      int no=0,ma=-1;
      for(int k=0;k<G.size();k++){
	if(dist[k]>ma and !G[k].empty()){
	  no=k;
	  ma=dist[k];
	}
	//	cout<<"K: "<<k<<" "<<dist[k]<<endl;
      }
      fill(dist.begin(),dist.end(),MAX);
      bfs(no);
      for(int k=0;k<G.size();k++){
	if(! G[k].empty())
	ma=max(dist[k],ma);
      }
      G[i].pop_back();
      G[j].pop_back();
      mi=min(mi,ma);
    }
  }
  return mi;
}

Compilation message (stderr)

shortcut.cpp: In function 'void bfs(int)':
shortcut.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<G[v].size();i++){
                 ~^~~~~~~~~~~~
shortcut.cpp: In function 'long long int find_shortcut(int, std::vector<int>, std::vector<int>, int)':
shortcut.cpp:39:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<l.size();i++){
               ~^~~~~~~~~
shortcut.cpp:43:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<d.size();i++){
               ~^~~~~~~~~
shortcut.cpp:57:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int k=0;k<G.size();k++){
                   ~^~~~~~~~~
shortcut.cpp:66:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int k=0;k<G.size();k++){
                   ~^~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 14
• Subtask 3: 0 / 8
• Subtask 4: 0 / 7
• Subtask 5: 0 / 33
• Subtask 6: 0 / 22
• Subtask 7: 0 / 4
• Subtask 8: 0 / 3