oj.uz

답안 #557390

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
557390 2022-05-05T09:05:38 Z Jarif_Rahman 꿈 (IOI13_dreaming) C++17
18 / 100
 36 ms 10572 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;

int ans = 0;
vector<vector<pair<int, int>>> v;
vector<bool> bl;
vector<int> dis;

void dfs1(int nd, int ss){
    bl[nd] = 1;
    for(auto [x, w]: v[nd]) if(x != ss) dfs1(x, nd);
    for(auto [x, w]: v[nd]) if(x != ss) dis[nd] = max(dis[nd], dis[x]+w);
}
int dfs2(int nd, int ss, int s = 0){
    int mx = s, smx = s;
    int rt = s;
    for(auto [x, w]: v[nd]) if(x != ss){
        rt = max(rt, dis[x]+w);
        if(dis[x]+w > mx) smx = mx, mx = dis[x]+w;
        else if(dis[x]+w > smx) smx = dis[x]+w;
    }
    ans = max(ans, rt);
    for(auto [x, w]: v[nd]) if(x != ss) rt = min(rt, dfs2(x, nd, (dis[x]+w == mx?smx:mx)+w));
    return rt;
}

int travelTime(int n, int m, int L, int A[], int B[], int T[]){
    v.assign(n, {});
    bl.assign(n, 0);
    dis.assign(n, 0);

    for(int i = 0; i < m; i++){
        v[A[i]].pb({B[i], T[i]});
        v[B[i]].pb({A[i], T[i]});
    }

    vector<int> sth;

    for(int i = 0; i < n; i++){
        if(bl[i]) continue;
        dfs1(i, -1);
        sth.pb(dfs2(i, -1));
    }

    sort(sth.rbegin(), sth.rend());

    if(sth.size() == 1) return ans;

    int ans = max(ans, sth[0]+sth[1]+L);
    if(sth.size() > 2) ans = max(ans, sth[1]+sth[2]+2*L);

    return ans;
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:55:9: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |     int ans = max(ans, sth[0]+sth[1]+L);
      |         ^~~

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 36 ms 10572 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 36 ms 10572 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 17 ms 5588 KB Output is correct
2 Correct 18 ms 5636 KB Output is correct
3 Correct 21 ms 5508 KB Output is correct
4 Correct 24 ms 5592 KB Output is correct
5 Correct 22 ms 5588 KB Output is correct
6 Correct 20 ms 6076 KB Output is correct
7 Correct 22 ms 5832 KB Output is correct
8 Correct 17 ms 5464 KB Output is correct
9 Correct 16 ms 5460 KB Output is correct
10 Correct 20 ms 5688 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 4 ms 3664 KB Output is correct
13 Correct 4 ms 3664 KB Output is correct
14 Correct 5 ms 3664 KB Output is correct
15 Correct 4 ms 3664 KB Output is correct
16 Correct 6 ms 3664 KB Output is correct
17 Correct 5 ms 3676 KB Output is correct
18 Correct 5 ms 3664 KB Output is correct
19 Correct 5 ms 3664 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 340 KB Output is correct
23 Correct 4 ms 3664 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 36 ms 10572 KB Output isn't correct
2 Halted 0 ms 0 KB -