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답안 #167495

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
167495 2019-12-08T17:40:06 Z DavidDamian 꿈 (IOI13_dreaming) C++11
14 / 100
 70 ms 7928 KB 
#include "dreaming.h"
#include<vector>
#include<queue>
#include<algorithm>
#include<iostream>
using namespace std;
bool byGreater(int a,int b)
{
    return a>b;
}
struct edge
{
    int from,to;
    int w;
};
vector<edge> adjList[100005];
int Far[100005]; //Stores the minimum longest distance for each tree
int color[100005];
int d[2][100005];
queue<int> Q;
int bfs(int s,int op,int c)
{
    color[s]=c;
    d[op][s]=0;
    Q.push(s);
    int farthest_node;
    int maximum=0;
    while(Q.size()){
        int u=Q.front();Q.pop();
        for(edge e: adjList[u]){
            int v=e.to;
            if(color[v]!=c){
                color[v]=c;
                d[op][v]=d[op][u]+e.w;
                if(d[op][v]>maximum){
                    maximum=d[op][v];
                    farthest_node=v;
                }
                Q.push(v);
            }
        }
    }
    return farthest_node;
}
int getOptimumDistance(int s,int c)
{
    color[s]=c;
    int minimumD=1000000000;
    Q.push(s);
    while(Q.size()){
        int u=Q.front();Q.pop();
        if(max(d[0][u],d[1][u])<minimumD){
            minimumD=max(d[0][u],d[1][u]);
        }
        for(edge e: adjList[u]){
            int v=e.to;
            if(color[v]!=c){
                color[v]=c;
                Q.push(v);
            }
        }
    }
    return minimumD;
}
short used[100005];
int far[3];
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    for(int i=0;i<M;i++){
        edge e={A[i],B[i],T[i]};
        adjList[e.from].push_back(e);
        swap(e.from,e.to);
        adjList[e.from].push_back(e);
    }
    int answer=0;
    int max_diameter=0;
    int c=1;
    int trees=0;
    for(int u=0;u<N;u++){
        if(color[u]!=0) continue;
        int a=bfs(u,1,c++);
        int b=bfs(a,0,c++);
        bfs(b,1,c++);
        max_diameter=max(max_diameter,d[1][a]);
        Far[trees++]=getOptimumDistance(u,c++);
    }
    for(int j=0;j<min(3,trees);j++){
        int maximum;
        for(int i=0;i<trees;i++){
            if(Far[i]>far[j] && !used[i]){
                far[j]=Far[i];
                maximum=i;
            }
        }
        used[maximum]=1;
    }
    //cout<<far[0]<<" "<<far[1]<<" "<<far[2]<<endl;
    if(trees==1){
        answer=max_diameter;
    }
    else if(trees==2){
        answer=max(max_diameter,far[0]+L+far[1]); //Path joining yourself with another tree
    }
    else{
        answer=max(max_diameter,
                   max(far[0]+L+far[1],far[1]+L+L+far[2])); //Path joining yourself with another tree
                   //and joining other two trees whose path passes for you
    }
    return answer;
}

Compilation message

dreaming.cpp: In function 'int bfs(int, int, int)':
dreaming.cpp:43:12: warning: 'farthest_node' may be used uninitialized in this function [-Wmaybe-uninitialized]
     return farthest_node;
            ^~~~~~~~~~~~~
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:94:22: warning: 'maximum' may be used uninitialized in this function [-Wmaybe-uninitialized]
         used[maximum]=1;
         ~~~~~~~~~~~~~^~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 70 ms 7800 KB Output is correct
2 Correct 70 ms 7928 KB Output is correct
3 Correct 46 ms 6392 KB Output is correct
4 Correct 13 ms 3448 KB Output is correct
5 Correct 12 ms 3448 KB Output is correct
6 Correct 21 ms 4088 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 37 ms 5136 KB Output is correct
9 Correct 46 ms 5672 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 64 ms 6648 KB Output is correct
12 Correct 69 ms 7288 KB Output is correct
13 Correct 5 ms 2764 KB Output is correct

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 70 ms 7800 KB Output is correct
2 Correct 70 ms 7928 KB Output is correct
3 Correct 46 ms 6392 KB Output is correct
4 Correct 13 ms 3448 KB Output is correct
5 Correct 12 ms 3448 KB Output is correct
6 Correct 21 ms 4088 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 37 ms 5136 KB Output is correct
9 Correct 46 ms 5672 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 64 ms 6648 KB Output is correct
12 Correct 69 ms 7288 KB Output is correct
13 Correct 5 ms 2764 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 4 ms 2680 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2652 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 4 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2724 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Runtime error 8 ms 5368 KB Execution killed with signal 11 (could be triggered by violating memory limits)
29 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 70 ms 7800 KB Output is correct
2 Correct 70 ms 7928 KB Output is correct
3 Correct 46 ms 6392 KB Output is correct
4 Correct 13 ms 3448 KB Output is correct
5 Correct 12 ms 3448 KB Output is correct
6 Correct 21 ms 4088 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 37 ms 5136 KB Output is correct
9 Correct 46 ms 5672 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 64 ms 6648 KB Output is correct
12 Correct 69 ms 7288 KB Output is correct
13 Correct 5 ms 2764 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 4 ms 2680 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2652 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 4 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2724 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Runtime error 8 ms 5368 KB Execution killed with signal 11 (could be triggered by violating memory limits)
29 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 6648 KB Output is correct
2 Correct 35 ms 6648 KB Output is correct
3 Correct 37 ms 6776 KB Output is correct
4 Correct 33 ms 6648 KB Output is correct
5 Correct 32 ms 6648 KB Output is correct
6 Correct 36 ms 6876 KB Output is correct
7 Correct 35 ms 6724 KB Output is correct
8 Correct 31 ms 6524 KB Output is correct
9 Correct 32 ms 6520 KB Output is correct
10 Correct 33 ms 6776 KB Output is correct
11 Correct 4 ms 2684 KB Output is correct
12 Correct 11 ms 4344 KB Output is correct
13 Correct 12 ms 4320 KB Output is correct
14 Correct 11 ms 4216 KB Output is correct
15 Correct 11 ms 4344 KB Output is correct
16 Correct 11 ms 4344 KB Output is correct
17 Correct 11 ms 4088 KB Output is correct
18 Correct 12 ms 4344 KB Output is correct
19 Correct 11 ms 4348 KB Output is correct
20 Runtime error 8 ms 5240 KB Execution killed with signal 11 (could be triggered by violating memory limits)
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 70 ms 7800 KB Output is correct
2 Correct 70 ms 7928 KB Output is correct
3 Correct 46 ms 6392 KB Output is correct
4 Correct 13 ms 3448 KB Output is correct
5 Correct 12 ms 3448 KB Output is correct
6 Correct 21 ms 4088 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 37 ms 5136 KB Output is correct
9 Correct 46 ms 5672 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 64 ms 6648 KB Output is correct
12 Correct 69 ms 7288 KB Output is correct
13 Correct 5 ms 2764 KB Output is correct
14 Correct 5 ms 2808 KB Output is correct
15 Correct 5 ms 2808 KB Output is correct
16 Correct 6 ms 2936 KB Output is correct
17 Correct 5 ms 2936 KB Output is correct
18 Correct 5 ms 2936 KB Output is correct
19 Correct 6 ms 2936 KB Output is correct
20 Correct 4 ms 2808 KB Output is correct
21 Correct 5 ms 2936 KB Output is correct
22 Correct 6 ms 2936 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 4 ms 2680 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Correct 4 ms 2808 KB Output is correct
29 Correct 4 ms 2784 KB Output is correct
30 Correct 4 ms 2680 KB Output is correct
31 Correct 4 ms 2780 KB Output is correct
32 Correct 4 ms 2680 KB Output is correct
33 Correct 4 ms 2680 KB Output is correct
34 Correct 4 ms 2652 KB Output is correct
35 Correct 4 ms 2680 KB Output is correct
36 Correct 4 ms 2680 KB Output is correct
37 Correct 4 ms 2680 KB Output is correct
38 Correct 4 ms 2680 KB Output is correct
39 Correct 4 ms 2680 KB Output is correct
40 Runtime error 8 ms 5240 KB Execution killed with signal 11 (could be triggered by violating memory limits)
41 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 70 ms 7800 KB Output is correct
2 Correct 70 ms 7928 KB Output is correct
3 Correct 46 ms 6392 KB Output is correct
4 Correct 13 ms 3448 KB Output is correct
5 Correct 12 ms 3448 KB Output is correct
6 Correct 21 ms 4088 KB Output is correct
7 Correct 4 ms 2680 KB Output is correct
8 Correct 37 ms 5136 KB Output is correct
9 Correct 46 ms 5672 KB Output is correct
10 Correct 4 ms 2680 KB Output is correct
11 Correct 64 ms 6648 KB Output is correct
12 Correct 69 ms 7288 KB Output is correct
13 Correct 5 ms 2764 KB Output is correct
14 Correct 4 ms 2680 KB Output is correct
15 Correct 4 ms 2680 KB Output is correct
16 Correct 4 ms 2680 KB Output is correct
17 Correct 4 ms 2680 KB Output is correct
18 Correct 4 ms 2680 KB Output is correct
19 Correct 4 ms 2652 KB Output is correct
20 Correct 4 ms 2680 KB Output is correct
21 Correct 4 ms 2680 KB Output is correct
22 Correct 4 ms 2680 KB Output is correct
23 Correct 4 ms 2680 KB Output is correct
24 Correct 4 ms 2680 KB Output is correct
25 Correct 5 ms 2724 KB Output is correct
26 Correct 4 ms 2680 KB Output is correct
27 Correct 4 ms 2680 KB Output is correct
28 Runtime error 8 ms 5368 KB Execution killed with signal 11 (could be triggered by violating memory limits)
29 Halted 0 ms 0 KB -