oj.uz

답안 #893112

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
893112 2023-12-26T14:20:28 Z raul2008487 꿈 (IOI13_dreaming) C++17
18 / 100
 51 ms 15884 KB 
#include<bits/stdc++.h>
#include "dreaming.h"
#define ll long long
#define pll pair<ll,ll>
#define vl vector<ll>
#define fi first
#define se second
#define in insert
#define all(v) v.begin(),v.end()
const int sz = 100005;
const ll inf = 1000000000000000;
using namespace std;
vector<pair<ll,ll>> adj[sz];
ll dis[sz][2], center, v1, v2, mx, cnt = -1;
bool used[sz];
vector<vector<ll>> path;
void trav(ll node){
    used[node] = 1;
    path[cnt].push_back(node);
    for(pll edge: adj[node]){
        if(!used[edge.fi]){
            trav(edge.fi);
        }
    }
}
void dfs(ll node, ll we, ll p){
    if(we > mx){
        v2 = node;
        mx = we;
    }
    for(pll edge: adj[node]){
        if(edge.fi != p){
            dfs(edge.fi, we + edge.se, node);
        }
    }
}
void caldis(ll node, ll we, ll p, ll type){
    dis[node][type] = we;
    for(pll edge: adj[node]){
        if(edge.fi != p){
            caldis(edge.fi, we + edge.se, node, type);
        }
    }
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    ll n = N, m = M, i, j;
    for(i=1;i<=m;i++){
        adj[A[i]].push_back({B[i], T[i]});
        adj[B[i]].push_back({A[i], T[i]});
    }
    for(i=0;i<n;i++){
        if(!used[i]){
            cnt++;
            path.push_back(vl(0));
            trav(i);
        }
    }
    multiset<ll> ms;
    ll res = -inf;
    for(i=0;i<=cnt;i++){
        mx = -inf, v1 = -1, v2 = -1;
        dfs(path[i][0], 0, -1);
        v1 = v2;
        mx = -inf;
        dfs(v1, 0, -1);
        caldis(v1, 0, -1, 0);caldis(v2, 0, -1, 1);  
        ll pc = path[i][0], pb = max(dis[pc][0], dis[pc][1]);
        for(ll x: path[i]){
            if (max(dis[x][0], dis[x][1]) < max(dis[pc][0], dis[pc][1])) pc = x;
        }
        ms.in( max(dis[pc][0], dis[pc][1]) );
        res = max(res, mx);
        //ans = max(ans, pb);
    }
    if (cnt == 0) return max(res, *ms.begin());
    auto it = ms.end();
    it--;
    it--;
    auto it1 = it;
    it1--;
    if (cnt == 1){ return max(res, *ms.rbegin() + *it + L); assert(0);}
    return max({res, *ms.rbegin() + *it + L, *it + *it1 + 2*L});
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:67:29: warning: unused variable 'pb' [-Wunused-variable]
   67 |         ll pc = path[i][0], pb = max(dis[pc][0], dis[pc][1]);
      |                             ^~
dreaming.cpp:46:25: warning: unused variable 'j' [-Wunused-variable]
   46 |     ll n = N, m = M, i, j;
      |                         ^

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 51 ms 15464 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 5208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 51 ms 15464 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 13840 KB Output is correct
2 Correct 31 ms 13828 KB Output is correct
3 Correct 28 ms 13840 KB Output is correct
4 Correct 27 ms 13840 KB Output is correct
5 Correct 28 ms 13828 KB Output is correct
6 Correct 31 ms 15324 KB Output is correct
7 Correct 37 ms 14496 KB Output is correct
8 Correct 29 ms 13528 KB Output is correct
9 Correct 29 ms 13580 KB Output is correct
10 Correct 29 ms 14084 KB Output is correct
11 Correct 1 ms 5468 KB Output is correct
12 Correct 27 ms 15364 KB Output is correct
13 Correct 20 ms 15624 KB Output is correct
14 Correct 20 ms 15884 KB Output is correct
15 Correct 22 ms 15480 KB Output is correct
16 Correct 22 ms 15616 KB Output is correct
17 Correct 22 ms 15624 KB Output is correct
18 Correct 21 ms 15628 KB Output is correct
19 Correct 21 ms 15564 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 1 ms 5464 KB Output is correct
22 Correct 2 ms 5724 KB Output is correct
23 Correct 21 ms 15740 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 5208 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 51 ms 15464 KB Output isn't correct
2 Halted 0 ms 0 KB -