Submission #989311

#	Time	Username	Problem	Language	Result	Execution time	Memory
989311		sondos225	Crocodile's Underground City (IOI11_crocodile)	C++17	46 / 100	13 ms	7296 KiB

crocodile

#include "crocodile.h"
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "grader.cpp"
#endif // LOCAL
#define forr(x,i,n) for(int x=i; x<n; x++)
#define pb push_back
#define pii pair<int,int>
#define all(x) x.begin(),x.end()
#define fi first
#define se second
#define sz size()
bool vis[100000];
bool ex[100000];
//int routes[100000];
vector<pii> a[100000];
vector<int> dp[100000];
int dfs(int x)
{
    //cout<<x<<endl;
    if (ex[x])
    {
        return 0;
    }
   // if (routes[x]!=0) return routes[x];
        int ch1=1000000000, ch2=1000000000;
        forr(i,0,a[x].sz)
        {
            auto y=a[x][i];
            if (dp[x][i]==0){
            if (!vis[y.fi])
            {
                vis[y.fi]=1;

                int ch=(dfs(y.fi))+y.se;
                //cout<<x<<' '<<y.fi<<' '<<ch<<endl;
                dp[x][i]=ch;
                if (ch<=ch1 && ch<=ch2)
                {
                    ch2=ch1;
                    ch1=ch;
                }
                else if (ch>=ch1 && ch<=ch2)
                {
                    ch2=ch;
                }
                vis[y.fi]=0;
            }
            }
            else if (!vis[y.fi])
            {
                int ch=dp[x][i];
                if (ch<=ch1 && ch<=ch2)
                {
                    ch2=ch1;
                    ch1=ch;
                }
                else if (ch>=ch1 && ch<=ch2)
                {
                    ch2=ch;
                }
            }
        }
        //sort(all(ch));
       // if (ch2==INT_MAX) return ch1;
        return ch2;
        // routes[x]=
      //  ch2;
}
int travel_plan(int n, int m, int r[][2], int l[], int k, int e[])
{
    //r/l/k/e/
    forr(i,0,m)
    {
        int x=r[i][0];
        int y=r[i][1];
        a[x].pb({y,l[i]});
        a[y].pb({x,l[i]});
        dp[x].pb(0);
        dp[y].pb(0);
    }

    forr(i,0,k) ex[e[i]]=1;
vis[0]=1;
  return dfs(0);
}

Compilation message (stderr)

crocodile.cpp: In function 'int dfs(int)':
crocodile.cpp:7:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 | #define forr(x,i,n) for(int x=i; x<n; x++)
      |                                   ^
crocodile.cpp:28:9: note: in expansion of macro 'forr'
   28 |         forr(i,0,a[x].sz)
      |         ^~~~

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