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답안 #1093336

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1093336 2024-09-26T15:18:10 Z Aviansh 경주 (Race) (IOI11_race) C++17
21 / 100
 3000 ms 9056 KB 
#include <bits/stdc++.h>
#include "race.h"

using namespace std;

int subSize(int st, vector<pair<int,int>>(&g)[], int sz[], int par, bool rem[]){
    sz[st]=1;
    for(pair<int,int> p : g[st]){
        int c = p.first;
        if(rem[c]||c==par) continue;
        sz[st]+=subSize(c,g,sz,st,rem);
    }
    return sz[st];
}

int findCentroid(int node, vector<pair<int,int>>(&g)[], int siz, bool rem[], int par, int sizes[]){
    for(pair<int,int> p : g[node]){
        int c = p.first;
        if(c==par||rem[c]) continue;
        if(sizes[c]*2>siz){
            return findCentroid(c,g,siz,rem,node,sizes);
        }
    }
    return node;
}

void findLens(int st, vector<pair<int,int>>(&g)[], bool rem[], int par, map<int,int>(&mp), int dep, int len){
    for(pair<int,int> p : g[st]){
        int c = p.first;
        int d = p.second;
        if(c==par||rem[c]) continue;
        if(mp[dep+d]==0){
            mp[dep+d]=len+1;
        }
        else{
            mp[dep+d]=min(mp[dep+d],len+1);
        }
        findLens(c,g,rem,st,mp,dep+d,len+1);
    }
}

int buildDecomp(int node, vector<pair<int,int>>(&g)[], bool rem[], int sz[], int k){
    int centroid = findCentroid(node,g,subSize(node,g,sz,-1,rem),rem,-1,sz);
    int ans = 2e9;
    map<int,int>mp;
    rem[centroid]=1;
    for(pair<int,int> p : g[centroid]){
        int c = p.first;
        if(rem[c]) continue;
        map<int,int>temp;
        temp[p.second]=1;
        findLens(c,g,rem,-1,temp,p.second,0);
        for(pair<int,int>pa : temp){
            if(mp[k-pa.first]){
                ans=min(ans,mp[k-pa.first]+pa.second);
            }
        }
        for(pair<int,int>pa:temp){
            if(mp[pa.first]){
                mp[pa.first]=min(mp[pa.first],pa.second);
            }
            else{
                mp[pa.first]=pa.second;
            }
        }
    }
    if(mp[k]){
        ans=min(ans,mp[k]);
    }
    for(pair<int,int>p:g[centroid]){
        int c = p.first;
        if(rem[c])continue;
        ans=min(ans,buildDecomp(c,g,rem,sz,k));
    }
    return ans;
}

int brute(int st, vector<pair<int,int>>(&g)[], int dep, int len, int k, int par){
    if(dep==k){
        return len;
    }
    if(dep>k){
        return 2e9;
    }
    int ans = 2e9;
    for(pair<int,int>p:g[st]){
        int c = p.first;
        int d = p.second;
        if(c==par)
            continue;
        ans=min(brute(c,g,dep+d,len+1,k, st),ans);
    }
    return ans;
}

int best_path(int n, int k, int e[][2], int w[])
{
    vector<pair<int,int>>g[n];
    for(int i = 0;i<n-1;i++){
        g[e[i][0]].push_back({e[i][1],w[i]});
        g[e[i][1]].push_back({e[i][0],w[i]});
    }
    bool rem[n];
    int sz[n];
    fill(rem,rem+n,0);
    //int ans = buildDecomp(0,g,rem,sz,k);
    int ans = 2e9;
    for(int i = 0;i<n;i++){

        ans=min(ans,brute(i,g,0,0,k,-1));
    }
    if(ans==2e9){
        return -1;
    }
    else{
        return ans;
    }
}

Compilation message

race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:104:9: warning: unused variable 'sz' [-Wunused-variable]
  104 |     int sz[n];
      |         ^~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 6 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 6 ms 532 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 2 ms 348 KB Output is correct
29 Correct 4 ms 532 KB Output is correct
30 Correct 4 ms 532 KB Output is correct
31 Correct 6 ms 348 KB Output is correct
32 Correct 6 ms 348 KB Output is correct
33 Correct 5 ms 532 KB Output is correct
34 Correct 2 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 5 ms 540 KB Output is correct
38 Correct 7 ms 536 KB Output is correct

Subtask #3
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 2024 ms 9056 KB Output is correct
20 Correct 1884 ms 9044 KB Output is correct
21 Execution timed out 3054 ms 9044 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 6 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 6 ms 532 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 2 ms 348 KB Output is correct
29 Correct 4 ms 532 KB Output is correct
30 Correct 4 ms 532 KB Output is correct
31 Correct 6 ms 348 KB Output is correct
32 Correct 6 ms 348 KB Output is correct
33 Correct 5 ms 532 KB Output is correct
34 Correct 2 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 5 ms 540 KB Output is correct
38 Correct 7 ms 536 KB Output is correct
39 Correct 2024 ms 9056 KB Output is correct
40 Correct 1884 ms 9044 KB Output is correct
41 Execution timed out 3054 ms 9044 KB Time limit exceeded
42 Halted 0 ms 0 KB -