Submission #136016

#	Time	Username	Problem	Language	Result	Execution time	Memory
136016		DanerZein	Shortcut (IOI16_shortcut)	C++14	0 / 100	1913 ms	392 KiB

shortcut

#include "shortcut.h"
#include <bits/stdc++.h>
#define MAX 10000000000
using namespace std;
typedef pair<int,int> ii;
typedef vector<ii> vi;
vector<vi>G;
int ml;
vector<long long>dist(2000);

void bfs(int u){
  dist[u]=0;
  vector<int>vis(ml,0);
  queue<int>q;
  q.push(u);
  vis[u]=1;
  while(!q.empty()){
    int v=q.front();
    //cout<<v<<endl;
    q.pop();
    vis[v]=0;
    for(int i=0;i<G[v].size();i++){
      long long x=G[v][i].first;
      long long w=G[v][i].second;
      if(dist[v]+w<dist[x]){
	dist[x]=dist[v]+w;
	if(vis[x]==0){
	  q.push(x);
	  vis[x]=1;
	}
      }
    }
  }
}
long long find_shortcut(int  n, std::vector<int> l, std::vector<int> d, int c){
 
  ml=2*n;
  G.resize(2*n);
  for(long long 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(long long 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]));
    }
  }
  long long mi=MAX;
  for(long long i=0;i<n;i++){
    for(long long j=i+1;j<n;j++){
      G[i].push_back(ii(j,c));
      G[j].push_back(ii(i,c));
       long long ma=-1;
       for(int k=0;k<G.size();k++){
	 if(G[k].empty()){
	   continue;
	 }
	 fill(dist.begin(),dist.end(),MAX);
	 //cout<<"0:"<<endl;
	 bfs(k);
	 for(int l=0;l<G.size();l++){
	   if(!G[l].empty()){
	     ma=max(ma,dist[l]);
	   }
	 }
       }
       /*
       vector<long long> no;
      for(int k=0;k<G.size();k++){
	  if(ma<=dist[k] and !G[k].empty()){
	  ma=dist[k];
	  no.push_back(k);
	}
      }
     for(int k=0;k<no.size();k++){
	fill(dist.begin(),dist.end(),MAX);
	bfs(no[k]);
	for(int l=0;l<G.size();l++){
	  if(!G[l].empty()){
	    long long w=dist[l];
	    ma=max(ma,w);
	  }
	}
	}*/
      G[i].pop_back();
      G[j].pop_back();
      if(mi>ma){
      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:39:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(long long i=0;i<l.size();i++){
                     ~^~~~~~~~~
shortcut.cpp:43:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(long long i=0;i<d.size();i++){
                     ~^~~~~~~~~
shortcut.cpp:55:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        for(int k=0;k<G.size();k++){
                    ~^~~~~~~~~
shortcut.cpp:62:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int l=0;l<G.size();l++){
               ~^~~~~~~~~

• 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