Submission #145288

#	Time	Username	Problem	Language	Result	Execution time	Memory
145288		Bodo171	Sky Walking (IOI19_walk)	C++14	10 / 100	67 ms	10144 KiB

walk

#include "walk.h"
#include <queue>
#include <vector>
#include <algorithm>
#include <climits>
#include <iostream>
using namespace std;
const int nmax=10005;
queue<int> q;
vector< pair<int,long long > >v[nmax];
vector<int> rel,newrel;
int norm[105][105];
int bune[nmax];
long long d[nmax];
int n,nr,i,j;
void add(int x,int y,int z)
{
    v[x].push_back({y,z});
    v[y].push_back({x,z});
}
long long min_distance(vector<int> x, vector<int> h, vector<int> l, vector<int> r, vector<int> y, int s, int g) {
    n=x.size();
    rel.push_back(0);
    for(i=0;i<y.size();i++)
        rel.push_back(y[i]);
    for(i=0;i<h.size();i++)
        rel.push_back(h[i]);
    sort(rel.begin(),rel.end());
    for(i=0;i<rel.size();i++)
        if(i==0||rel[i]!=rel[i-1])
          newrel.push_back(rel[i]);
    rel=newrel;
    int cate=rel.size();
    for(i=0;i<n;i++)
        for(j=0;j<cate;j++)
           norm[i][j]=++nr;
    for(i=0;i<n;i++)
    {
        for(j=0;j<cate-1;j++)
        {
            add(norm[i][j],norm[i][j+1],rel[j+1]-rel[j]);
        }
    }
    for(i=1;i<=nr;i++)
        d[i]=LLONG_MAX;
    int m=l.size();
    for(i=0;i<m;i++)
    {
        int p=0,nr_bune=0;
        while(y[i]>rel[p])
            p++;
        for(int t=l[i];t<=r[i];t++)
            if(h[t]>=y[i])
              bune[++nr_bune]=t;
        for(int t=1;t<nr_bune;t++)
            add(norm[bune[t]][p],norm[bune[t+1]][p],x[bune[t+1]]-x[bune[t]]);
    }
    d[norm[s][0]]=0;
    q.push(norm[s][0]);
    while(!q.empty())
    {
        int X=q.front(),nod;q.pop();
        for(i=0;i<v[X].size();i++)
        {
            nod=v[X][i].first;
            if(d[X]+v[X][i].second<d[nod])
            {
                d[nod]=d[X]+v[X][i].second;
                q.push(nod);
            }
        }
    }
    if(d[norm[g][0]]==LLONG_MAX) d[norm[g][0]]=-1;
	return d[norm[g][0]];
}

Compilation message (stderr)

walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0;i<y.size();i++)
             ~^~~~~~~~~
walk.cpp:26:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0;i<h.size();i++)
             ~^~~~~~~~~
walk.cpp:29:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0;i<rel.size();i++)
             ~^~~~~~~~~~~
walk.cpp:63:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(i=0;i<v[X].size();i++)
                 ~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 14
• Subtask 3: 0 / 15
• Subtask 4: 0 / 18
• Subtask 5: 0 / 43