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답안 #584287

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
584287 2022-06-27T07:20:20 Z 반딧불(#8375) Wild Boar (JOI18_wild_boar) C++17
47 / 100
 18000 ms 215592 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

struct Edge{
    int s, e, i; ll v;
    Edge(){}
    Edge(int s, int e, int i, ll v): s(s), e(e), i(i), v(v){}
};

struct dat{
    int x; ll y;
    dat(){}
    dat(int x, ll y): x(x), y(y){}
    bool operator<(const dat &r)const{
        return y>r.y;
    }
};

int n, m, k, l;
vector<int> link[2002];
vector<int> revLink[2002];
Edge edge[4002];
int arr[100002];
ll dist[4002][4002];
vector<pair<ll, int> > distVec[2002][4002];

void init(){
    for(int i=0; i<m*2; i++){
        for(int j=0; j<m*2; j++) dist[i][j] = 1e18;
        priority_queue<dat> pq;
        pq.push(dat(i, 0));
        while(!pq.empty()){
            dat tmp = pq.top(); pq.pop();
            if(dist[i][tmp.x] < 1e18) continue;
            int xe = tmp.x, x = edge[xe].e;
            dist[i][xe] = tmp.y;
            for(auto ye: link[x]){
                if((xe^ye) == 1) continue;
                pq.push(dat(ye, tmp.y + edge[ye].v));
            }
        }
    }

    /// ����
    for(int i=1; i<=n; i++){
        for(int j=0; j<m*2; j++){
            for(auto c: link[i]){ /// c: i���� ������ ����
                distVec[i][j].push_back(make_pair(dist[c][j]+edge[c].v, c));
                for(int pnt=(int)distVec[i][j].size()-1; pnt>0; pnt--){
                    if(distVec[i][j][pnt-1] > distVec[i][j][pnt]){
                        swap(distVec[i][j][pnt-1], distVec[i][j][pnt]);
                    }
                    else break;
                }
                if((int)distVec[i][j].size() >= 3) distVec[i][j].pop_back();
            }
        }
    }
}

ll DP[2][4002];
void solve(){
    for(int i=0; i<m*2; i++) DP[0][i] = DP[1][i] = 1e18;
    for(int i=0; i<m*2; i++){
        if(edge[i].e != arr[2]) continue;
        for(auto s: link[arr[1]]){
            DP[0][i] = min(DP[0][i], dist[s][i]+edge[s].v);
        }
    }
    for(int d=3; d<=l; d++){
        int b = d%2;
        for(int i=0; i<m*2; i++) DP[b][i] = 1e18;
        vector<pair<ll, int> > vec;
        for(int c=0; c<m*2; c++){
            if(edge[c].e == arr[d-1]){
                vec.push_back(make_pair(DP[!b][c], c));
                for(int pnt=(int)vec.size()-1; pnt>0; pnt--){
                    if(vec[pnt-1] > vec[pnt]){
                        swap(vec[pnt-1], vec[pnt]);
                    }
                    else break;
                }
                if((int)vec.size() >= 3) vec.pop_back();
            }
        }

        for(int c=0; c<m*2; c++){ /// d�� ���ϴ� ���� ���� ��ȣ
            if(edge[c].e != arr[d]) continue;
            for(pair<ll, int> p1: vec){ /// ��� ������ ���� �����
                for(pair<ll, int> p2: distVec[arr[d-1]][c]){ /// d�� ���ϴ� �����
                    if((p1.second ^ p2.second) == 1) continue;
                    DP[b][c] = min(DP[b][c], p1.first + p2.first);
                }
            }
        }
    }
    ll ans = 1e18;
    for(int i=0; i<m*2; i++) if(edge[i].e == arr[l]) ans = min(ans, DP[l%2][i]);
    printf("%lld\n", ans == 1e18 ? -1 : ans);
}

int main(){
    scanf("%d %d %d %d", &n, &m, &k, &l);
    for(int i=0; i<m; i++){
        scanf("%d %d %lld", &edge[i*2].s, &edge[i*2].e, &edge[i*2].v);
        edge[i*2+1] = edge[i*2];
        swap(edge[i*2+1].s, edge[i*2+1].e);
        edge[i*2].i = i*2, edge[i*2+1].i = i*2+1;

        link[edge[i*2].s].push_back(i*2);
        link[edge[i*2+1].s].push_back(i*2+1);
        revLink[edge[i*2].e].push_back(i*2);
        revLink[edge[i*2+1].e].push_back(i*2+1);
    }
    init();

    for(int i=1; i<=l; i++) scanf("%d", &arr[i]);
    for(int i=1; i<=k; i++){
        int x, y;
        scanf("%d %d", &x, &y);
        arr[x] = y;
        solve();
    }
}

Compilation message

wild_boar.cpp: In function 'int main()':
wild_boar.cpp:106:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |     scanf("%d %d %d %d", &n, &m, &k, &l);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:108:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         scanf("%d %d %lld", &edge[i*2].s, &edge[i*2].e, &edge[i*2].v);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:120:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  120 |     for(int i=1; i<=l; i++) scanf("%d", &arr[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~
wild_boar.cpp:123:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  123 |         scanf("%d %d", &x, &y);
      |         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 188492 KB Output is correct
2 Correct 85 ms 188620 KB Output is correct
3 Correct 88 ms 188648 KB Output is correct
4 Correct 93 ms 188616 KB Output is correct
5 Correct 89 ms 188580 KB Output is correct
6 Correct 90 ms 188588 KB Output is correct
7 Correct 88 ms 188620 KB Output is correct
8 Correct 88 ms 188636 KB Output is correct
9 Correct 87 ms 188596 KB Output is correct
10 Correct 92 ms 188692 KB Output is correct
11 Correct 90 ms 188604 KB Output is correct
12 Correct 87 ms 188596 KB Output is correct
13 Correct 90 ms 188536 KB Output is correct
14 Correct 89 ms 188564 KB Output is correct
15 Correct 90 ms 188544 KB Output is correct
16 Correct 88 ms 188620 KB Output is correct
17 Correct 88 ms 188636 KB Output is correct
18 Correct 91 ms 188648 KB Output is correct
19 Correct 90 ms 188568 KB Output is correct
20 Correct 87 ms 188652 KB Output is correct
21 Correct 88 ms 188612 KB Output is correct
22 Correct 92 ms 188640 KB Output is correct
23 Correct 90 ms 188516 KB Output is correct
24 Correct 91 ms 188640 KB Output is correct
25 Correct 86 ms 188568 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 188492 KB Output is correct
2 Correct 85 ms 188620 KB Output is correct
3 Correct 88 ms 188648 KB Output is correct
4 Correct 93 ms 188616 KB Output is correct
5 Correct 89 ms 188580 KB Output is correct
6 Correct 90 ms 188588 KB Output is correct
7 Correct 88 ms 188620 KB Output is correct
8 Correct 88 ms 188636 KB Output is correct
9 Correct 87 ms 188596 KB Output is correct
10 Correct 92 ms 188692 KB Output is correct
11 Correct 90 ms 188604 KB Output is correct
12 Correct 87 ms 188596 KB Output is correct
13 Correct 90 ms 188536 KB Output is correct
14 Correct 89 ms 188564 KB Output is correct
15 Correct 90 ms 188544 KB Output is correct
16 Correct 88 ms 188620 KB Output is correct
17 Correct 88 ms 188636 KB Output is correct
18 Correct 91 ms 188648 KB Output is correct
19 Correct 90 ms 188568 KB Output is correct
20 Correct 87 ms 188652 KB Output is correct
21 Correct 88 ms 188612 KB Output is correct
22 Correct 92 ms 188640 KB Output is correct
23 Correct 90 ms 188516 KB Output is correct
24 Correct 91 ms 188640 KB Output is correct
25 Correct 86 ms 188568 KB Output is correct
26 Correct 89 ms 189072 KB Output is correct
27 Correct 147 ms 191052 KB Output is correct
28 Correct 167 ms 191056 KB Output is correct
29 Correct 423 ms 198876 KB Output is correct
30 Correct 680 ms 198792 KB Output is correct
31 Correct 1209 ms 198984 KB Output is correct
32 Correct 1227 ms 199036 KB Output is correct
33 Correct 357 ms 200896 KB Output is correct
34 Correct 360 ms 200848 KB Output is correct
35 Correct 1004 ms 200460 KB Output is correct
36 Correct 770 ms 200348 KB Output is correct
37 Correct 366 ms 200984 KB Output is correct
38 Correct 325 ms 202064 KB Output is correct
39 Correct 494 ms 201456 KB Output is correct
40 Correct 308 ms 202136 KB Output is correct
41 Correct 335 ms 202108 KB Output is correct
42 Correct 431 ms 202008 KB Output is correct
43 Correct 291 ms 202808 KB Output is correct
44 Correct 292 ms 202776 KB Output is correct
45 Correct 247 ms 202664 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 188492 KB Output is correct
2 Correct 85 ms 188620 KB Output is correct
3 Correct 88 ms 188648 KB Output is correct
4 Correct 93 ms 188616 KB Output is correct
5 Correct 89 ms 188580 KB Output is correct
6 Correct 90 ms 188588 KB Output is correct
7 Correct 88 ms 188620 KB Output is correct
8 Correct 88 ms 188636 KB Output is correct
9 Correct 87 ms 188596 KB Output is correct
10 Correct 92 ms 188692 KB Output is correct
11 Correct 90 ms 188604 KB Output is correct
12 Correct 87 ms 188596 KB Output is correct
13 Correct 90 ms 188536 KB Output is correct
14 Correct 89 ms 188564 KB Output is correct
15 Correct 90 ms 188544 KB Output is correct
16 Correct 88 ms 188620 KB Output is correct
17 Correct 88 ms 188636 KB Output is correct
18 Correct 91 ms 188648 KB Output is correct
19 Correct 90 ms 188568 KB Output is correct
20 Correct 87 ms 188652 KB Output is correct
21 Correct 88 ms 188612 KB Output is correct
22 Correct 92 ms 188640 KB Output is correct
23 Correct 90 ms 188516 KB Output is correct
24 Correct 91 ms 188640 KB Output is correct
25 Correct 86 ms 188568 KB Output is correct
26 Correct 89 ms 189072 KB Output is correct
27 Correct 147 ms 191052 KB Output is correct
28 Correct 167 ms 191056 KB Output is correct
29 Correct 423 ms 198876 KB Output is correct
30 Correct 680 ms 198792 KB Output is correct
31 Correct 1209 ms 198984 KB Output is correct
32 Correct 1227 ms 199036 KB Output is correct
33 Correct 357 ms 200896 KB Output is correct
34 Correct 360 ms 200848 KB Output is correct
35 Correct 1004 ms 200460 KB Output is correct
36 Correct 770 ms 200348 KB Output is correct
37 Correct 366 ms 200984 KB Output is correct
38 Correct 325 ms 202064 KB Output is correct
39 Correct 494 ms 201456 KB Output is correct
40 Correct 308 ms 202136 KB Output is correct
41 Correct 335 ms 202108 KB Output is correct
42 Correct 431 ms 202008 KB Output is correct
43 Correct 291 ms 202808 KB Output is correct
44 Correct 292 ms 202776 KB Output is correct
45 Correct 247 ms 202664 KB Output is correct
46 Correct 516 ms 215592 KB Output is correct
47 Execution timed out 18088 ms 202724 KB Time limit exceeded
48 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 188492 KB Output is correct
2 Correct 85 ms 188620 KB Output is correct
3 Correct 88 ms 188648 KB Output is correct
4 Correct 93 ms 188616 KB Output is correct
5 Correct 89 ms 188580 KB Output is correct
6 Correct 90 ms 188588 KB Output is correct
7 Correct 88 ms 188620 KB Output is correct
8 Correct 88 ms 188636 KB Output is correct
9 Correct 87 ms 188596 KB Output is correct
10 Correct 92 ms 188692 KB Output is correct
11 Correct 90 ms 188604 KB Output is correct
12 Correct 87 ms 188596 KB Output is correct
13 Correct 90 ms 188536 KB Output is correct
14 Correct 89 ms 188564 KB Output is correct
15 Correct 90 ms 188544 KB Output is correct
16 Correct 88 ms 188620 KB Output is correct
17 Correct 88 ms 188636 KB Output is correct
18 Correct 91 ms 188648 KB Output is correct
19 Correct 90 ms 188568 KB Output is correct
20 Correct 87 ms 188652 KB Output is correct
21 Correct 88 ms 188612 KB Output is correct
22 Correct 92 ms 188640 KB Output is correct
23 Correct 90 ms 188516 KB Output is correct
24 Correct 91 ms 188640 KB Output is correct
25 Correct 86 ms 188568 KB Output is correct
26 Correct 89 ms 189072 KB Output is correct
27 Correct 147 ms 191052 KB Output is correct
28 Correct 167 ms 191056 KB Output is correct
29 Correct 423 ms 198876 KB Output is correct
30 Correct 680 ms 198792 KB Output is correct
31 Correct 1209 ms 198984 KB Output is correct
32 Correct 1227 ms 199036 KB Output is correct
33 Correct 357 ms 200896 KB Output is correct
34 Correct 360 ms 200848 KB Output is correct
35 Correct 1004 ms 200460 KB Output is correct
36 Correct 770 ms 200348 KB Output is correct
37 Correct 366 ms 200984 KB Output is correct
38 Correct 325 ms 202064 KB Output is correct
39 Correct 494 ms 201456 KB Output is correct
40 Correct 308 ms 202136 KB Output is correct
41 Correct 335 ms 202108 KB Output is correct
42 Correct 431 ms 202008 KB Output is correct
43 Correct 291 ms 202808 KB Output is correct
44 Correct 292 ms 202776 KB Output is correct
45 Correct 247 ms 202664 KB Output is correct
46 Correct 516 ms 215592 KB Output is correct
47 Execution timed out 18088 ms 202724 KB Time limit exceeded
48 Halted 0 ms 0 KB -