Submission #976823

#	Time	Username	Problem	Language	Result	Execution time	Memory
976823		AlperenT_	Cyberland (APIO23_cyberland)	C++17	15 / 100	866 ms	112376 KiB

cyberland

#include "cyberland.h"

#include <vector>
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#define pb push_back
#define F first
#define S second 
#define all(a) a.begin(),a.end()
#define pii pair <int,int>
#define PII pair<pii , pii>
#define ld long double
#define ll long long 
#define sz(v) (int)v.size()
#define rep(i , a , b) for(int i=a;i <= b;i++)
#define per(i , a , b) for(int i=a;i >= b;i--)
using namespace std ;
const ll maxn = 2e5+10  , N = 1e5 +1  , maxq = 202   , inf = 1e18  , maxk = 2022  , mod =1e9+7 ;
ld dis[maxn][102] ;int mark[maxn] ,is[maxn];
vector <pair<int,ld> > G[maxn] ;
void dfs(int v){
    is[v] =1 ;
    for(auto x : G[v]){
        if(is[x.F]==1)continue ;
        dfs(x.F) ;
    }
}

double solve(int n, int m, int k, int h, vector<int> x, vector<int> y, vector<int> c, vector<int> t) {
    rep(i , 0 , n-1)G[i].clear() ;
    rep(i , 0, n-1)is[i] =0 ;
    rep(i , 0 ,m-1){
        G[x[i]].pb({y[i] , c[i]});
        G[y[i]].pb({x[i] , c[i]}) ;
    }
    dfs(h) ;
    if(is[0]== 0)return -1 ;
    k = min(k , 100);
    rep(j , 0 , n-1)rep(z , 0 , k)dis[j][z] = inf ;
    dis[h][0] = 0 ;
    ld ans =inf;
    rep(i , 0 , k){
        priority_queue <pair<ld,int> > pq ;
        rep(j , 0 , n-1){
            pq.push({-dis[j][i] , j}) ;
            mark[j] =0 ;
        }
        while(sz(pq)){
            int v = pq.top().S ;pq.pop();
            if(mark[v] == 1)continue;
            mark[v] = 1; 
            for(auto a : G[v]){
                if(dis[a.F][i] > dis[v][i]+a.S){
                    dis[a.F][i] = dis[v][i] + a.S ;
                    pq.push({-dis[a.F][i] , a.F});
                }
            }        
        }
        rep(j , 0 , n-1){
            rep(z ,0 , sz(G[j])-1){
                G[j][z].S /= 2.00000000 ;
            }
        }
        rep(j , 0 , n-1){
            if(j == 0 || (t[j] == 0 && is[j] == 1))
            ans = min(ans , dis[j][i]) ;
        }
        rep(j , 0 , n-1){
            if(t[j]==2){
                dis[j][i+1] = dis[j][i] ;
            }
        }
    }
    return ans ;
}

• Subtask 1: 0 / 5
• Subtask 2: 8 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 19
• Subtask 5: 7 / 7
• Subtask 6: 0 / 16
• Subtask 7: 0 / 29
• Subtask 8: 0 / 3