Submission #104432

#	Time	Username	Problem	Language	Result	Execution time	Memory
104432		CaroLinda	Dreaming (IOI13_dreaming)	C++14	0 / 100	68 ms	10232 KiB

dreaming

#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


using namespace std;

//declarations
int N , M , L , c1=-1, c2=-1, C;
int degree[MAXN] ;
int mat[2][MAXN] ;

bool marc[MAXN] ;

vector<pii> adj[MAXN] ;

void dfs(int x)
{
    marc[x] = 1 ;
    lp(i,0,adj[x].size() )
    {
        int v = adj[x][i].ff , w = adj[x][i].ss ;
        if(mat[C][v] > 0) continue ;
        mat[C][v] = mat[C][x] + w ;
        dfs(v) ;
    }
}

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

    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)
            if(!marc[i])
        {
            //I found a set!
            if(c1 != -1) c2 = i  , C = 1;
            else c1 = i , C = 0 ;
            dfs(i) ;
        }

    int d1 = *max_element(mat[0] , mat[0] + N) ;
    int d2 = *max_element(mat[1] , mat[1]+N) ;

    int radio1 = d1, radio2 = d2;

    lp(i,0,N)
        radio1 = min( radio1 , max( mat[0][i] , d1 - mat[0][i] ) ) ;
    lp(i,0,N)
        radio2 = min( radio2 , max(mat[1][i] , d2 - mat[1][i] ) ) ;

    return radio1+radio2+L ;

}

/*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 (stderr)

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:26:8:
     lp(i,0,adj[x].size() )
        ~~~~~~~~~~~~~~~~~             
dreaming.cpp:26:5: note: in expansion of macro 'lp'
     lp(i,0,adj[x].size() )
     ^~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23