oj.uz

답안 #717001

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
717001 2023-03-31T19:57:23 Z HaroldVemeno 꿈 (IOI13_dreaming) C++17
18 / 100
 45 ms 11112 KB 
#include "dreaming.h"
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

ll rd[100000];
bool vis[100000];
struct W {
    int t;
    int w;
};
vector<vector<W>> al;

void calcrd(int v, int p) {
    vis[v] = true;
    ll mrd = 0;
    for(auto a : al[v]) {
        if(a.t == p) continue;
        calcrd(a.t, v);
        mrd = max(mrd, a.w + rd[a.t]);
    }
    rd[v] = mrd;
}

ll radius(int v, int p, ll tdist) {
    int mrv = -1;
    ll mr = tdist;
    ll mr2 = tdist;
    for(auto a : al[v]) {
        if(a.t == p) continue;
        if(rd[a.t] + a.w >= mr) {
            mrv = a.t;
            mr2 = mr;
            mr = rd[a.t] + a.w;
        } else if(rd[a.t] + a.w >= mr2) {
            mr2 = rd[a.t] + a.w;
        }
    }
    ll br = mr;
    for(auto a : al[v]) {
        if(a.t == p) continue;
        if(a.t == mrv) {
            br = min(br, radius(a.t, v, mr2 + a.w));
        } else {
            br = min(br, radius(a.t, v, mr + a.w));
        }
    }
    return br;
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    al.assign(N, {});
    for(int i = 0; i < M; ++i) {
        al[A[i]].push_back({B[i], T[i]});
        al[B[i]].push_back({A[i], T[i]});
    }
    vector<ll> rads;
    for(int i = 0; i < N; ++i) {
        if(vis[i]) continue;
        calcrd(i, -1);
        rads.push_back(radius(i, -1, 0));
    }
    sort(begin(rads), end(rads), greater<ll>{});
    if(rads.size() == 1) return rads[0];
    if(rads.size() == 2) return rads[0] + L + rads[1];
    return max(rads[0] + rads[1] + L, rads[1] + 2*L + rads[2]);
}

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 45 ms 11112 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 45 ms 11112 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 18 ms 6244 KB Output is correct
2 Correct 17 ms 6228 KB Output is correct
3 Correct 20 ms 6236 KB Output is correct
4 Correct 18 ms 6272 KB Output is correct
5 Correct 18 ms 6268 KB Output is correct
6 Correct 20 ms 7104 KB Output is correct
7 Correct 29 ms 6428 KB Output is correct
8 Correct 25 ms 6200 KB Output is correct
9 Correct 18 ms 6116 KB Output is correct
10 Correct 27 ms 6508 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 5 ms 4684 KB Output is correct
13 Correct 5 ms 4684 KB Output is correct
14 Correct 5 ms 4556 KB Output is correct
15 Correct 5 ms 4684 KB Output is correct
16 Correct 5 ms 4556 KB Output is correct
17 Correct 5 ms 4428 KB Output is correct
18 Correct 5 ms 4684 KB Output is correct
19 Correct 6 ms 4556 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 468 KB Output is correct
23 Correct 6 ms 4684 KB Output is correct

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 45 ms 11112 KB Output isn't correct
2 Halted 0 ms 0 KB -