oj.uz

Submission #104466

# Submission time Handle Problem Language Result Execution time Memory
104466 2019-04-07T00:05:38 Z CaroLinda Dreaming (IOI13_dreaming) C++14
0 / 100
 1000 ms 10360 KB 
#include <bits/stdc++.h>
#include "dreaming.h"

#define MAXN 100005
#define lp(i,a,b) for(int i = a ; i < b ; i++)
#define pb push_back
#define pii pair<int,int>
#define ff first
#define ss second
#define max3(a,b,c) max(max(a,b),c)


using namespace std;

//declarations
int N , M , L;
int radio1, radio2 ;

int degree[MAXN] ;
int d[MAXN] ;

bool marc[MAXN] ;

vector<int> radios ;
vector<pii> adj[MAXN] ;

//utilities

void ini(int x)
{ memset(d , -1 , sizeof d) ; d[x] = 0 ;}

void dfs(int x)
{
    marc[x] = 1 ;
    lp(i , 0 , adj[x].size() )
    {
        int v = adj[x][i].ff ;
        if(d[v] != -1) continue ;
        d[v] = d[x] + adj[x][i].ss ;
        dfs(v) ;
    }
}

int findMax()
{ return max_element(d, d+N) - d ; }

int findRadio(int x)
{
    int diam = *max_element(d,d+N)  ;
    int ans = diam ;
    lp(i,0,N)
        ans = min( ans , max(d[i] , diam - d[i]) ) ;
    return ans ;
}


int travelTime( int n , int m , int l , int A[] , int B[] , int T[] )
{
    N = n , M = m , L = l;
    int ans = -1 ;

    lp(i,0,M)
    {
        int a = A[i] , b = B[i] ;
        adj[a].pb( pii(b, T[i]) ) ;
        adj[b].pb( pii(a, T[i]) ) ;
        degree[a] ++ ;
        degree[b] ++ ;
    }

    lp(i,0,N)
        if(degree[i] == 1 and !marc[i])
        {
            ini(i) ; dfs(i) ;
            int V = findMax() ;
            ini(V) ; dfs(V) ;
            int k = findRadio(V) ;
            radios.pb(k) ;
            ans  = max(ans , k) ;
        }

    sort(radios.begin() , radios.end()) ;
    reverse(radios.begin() , radios.end() ) ;

    ans = max( ans , radios[0] + radios[1] + L ) ;

    if(radios.size() == 2) return ans ;

    ans = max( ans , radios[1] + radios[2] + 2*L ) ;

    return ans ;

}

/*int main()
{
    int n , m , l , a[MAXN] , b[MAXN] , t[MAXN] ;
    scanf("%d %d %d", &n, &m, &l) ;
    lp(i,0,m) scanf("%d%d%d", &a[i] , &b[i] , &t[i]) ;
    printf("%d\n",travelTime(n,m,l,a,b,t)) ;
}*/

Compilation message

dreaming.cpp: In function 'void dfs(int)':
dreaming.cpp:5:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define lp(i,a,b) for(int i = a ; i < b ; i++)
dreaming.cpp:35:8:
     lp(i , 0 , adj[x].size() )
        ~~~~~~~~~~~~~~~~~~~~~         
dreaming.cpp:35:5: note: in expansion of macro 'lp'
     lp(i , 0 , adj[x].size() )
     ^~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 10360 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 10360 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 10360 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1068 ms 6140 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 10360 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 10360 KB Output isn't correct
2 Halted 0 ms 0 KB -