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답안 #243420

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
243420 2020-07-01T04:20:21 Z mhy908 Wild Boar (JOI18_wild_boar) C++14
100 / 100
 9252 ms 418508 KB 
#include <bits/stdc++.h>
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<int, LL> pil;
const LL llinf=2e18;

int n, m, q, len;
int num[2010][2010], re;
vector<pii> link[2010];
LL dist[4010][4010];
bool ch[4010];

priority_queue<pair<LL, pii>, vector<pair<LL, pii> >, greater<pair<LL, pii> > > pq;
void do_dijk(int s, int e){
    memset(ch, 0, sizeof ch);
    pq.push(mp(0ll, mp(s, e)));
    dist[num[s][e]][num[s][e]]=0;
    while(!pq.empty()){
        LL d=pq.top().F;
        int fr=pq.top().S.F, nw=pq.top().S.S;
        pq.pop();
        if(ch[num[fr][nw]])continue;
        ch[num[fr][nw]]=true;
        for(auto j:link[nw]){
            if(j.F!=fr&&dist[num[s][e]][num[nw][j.F]]>d+j.S){
                dist[num[s][e]][num[nw][j.F]]=d+j.S;
                pq.push(mp(d+j.S, mp(nw, j.F)));
            }
        }
    }
}

int arr[100010];
struct NODE{
    pair<LL, pii> p[4];
    NODE(){for(int i=0; i<4; i++)p[i]=mp(llinf, mp(0, 0));}
}proc[2010][2010], tree[400010];

NODE f(NODE a, NODE b){
    NODE ret;
    vector<pair<LL, pii> > vc;
    for(int i=0; i<4; i++){
        for(int j=0; j<4; j++){
            if(a.p[i].S.S==b.p[j].S.F)vc.eb(mp(llinf, mp(0, 0)));
            else vc.eb(mp(a.p[i].F+b.p[j].F, mp(a.p[i].S.F, b.p[j].S.S)));
        }
    }
    for(auto k:vc)ret.p[0]=min(ret.p[0], k);
    for(auto k:vc){
        if(k.S.F!=ret.p[0].S.F&&k.S.S!=ret.p[0].S.S)
            ret.p[1]=min(ret.p[1], k);
    }
    for(auto k:vc){
        if(k.S.F!=ret.p[1].S.F&&k.S.S!=ret.p[0].S.S)
            ret.p[2]=min(ret.p[2], k);
    }
    for(auto k:vc){
        if(k.S.F!=ret.p[0].S.F&&k.S.S!=ret.p[1].S.S)
            ret.p[3]=min(ret.p[3], k);
    }
    return ret;
}

void init(int point, int s, int e){
    if(s==e){
        tree[point]=proc[arr[s]][arr[s+1]];
        return;
    }
    init(point*2, s, (s+e)/2);
    init(point*2+1, (s+e)/2+1, e);
    tree[point]=f(tree[point*2], tree[point*2+1]);
}
void update(int point, int s, int e, int num){
    if(s==e){
        tree[point]=proc[arr[s]][arr[s+1]];
        return;
    }
    if(num<=(s+e)/2)update(point*2, s, (s+e)/2, num);
    else update(point*2+1, (s+e)/2+1, e, num);
    tree[point]=f(tree[point*2], tree[point*2+1]);
}
int main(){
    scanf("%d %d %d %d", &n, &m, &q, &len);
    for(int i=1; i<=m; i++){
        int a, b, c;
        scanf("%d %d %d", &a, &b, &c);
        link[a].eb(b, c);
        num[a][b]=++re;
        link[b].eb(a, c);
        num[b][a]=++re;
    }
    for(int i=1; i<=re; i++){
        for(int j=1; j<=re; j++)dist[i][j]=llinf;
    }
    for(int i=1; i<=n; i++){
        for(auto j:link[i])do_dijk(i, j.F);
    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=n; j++){
            if(i==j)continue;
            vector<pair<LL, pii> > vc;
            for(auto k1:link[i]){
                for(auto k2:link[j]){
                    vc.eb(dist[num[i][k1.F]][num[k2.F][j]]+k1.S, mp(k1.F, k2.F));
                }
            }
            for(auto k:vc)proc[i][j].p[0]=min(proc[i][j].p[0], k);
            for(auto k:vc){
                if(k.S.F!=proc[i][j].p[0].S.F&&k.S.S!=proc[i][j].p[0].S.S)
                    proc[i][j].p[1]=min(proc[i][j].p[1], k);
            }
            for(auto k:vc){
                if(k.S.F!=proc[i][j].p[1].S.F&&k.S.S!=proc[i][j].p[0].S.S)
                    proc[i][j].p[2]=min(proc[i][j].p[2], k);
            }
            for(auto k:vc){
                if(k.S.F!=proc[i][j].p[0].S.F&&k.S.S!=proc[i][j].p[1].S.S)
                    proc[i][j].p[3]=min(proc[i][j].p[3], k);
            }
        }
    }
    for(int i=1; i<=len; i++)scanf("%d", &arr[i]);
    init(1, 1, len-1);
    while(q--){
        int a, b;
        scanf("%d %d", &a, &b);
        arr[a]=b;
        if(a<len)update(1, 1, len-1, a);
        if(a>1)update(1, 1, len-1, a-1);
        printf("%lld\n", tree[1].p[0].F>=llinf?-1:tree[1].p[0].F);
    }
}

Compilation message

wild_boar.cpp: In function 'int main()':
wild_boar.cpp:88:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d", &n, &m, &q, &len);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:91:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", &a, &b, &c);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:127:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=len; i++)scanf("%d", &arr[i]);
                              ~~~~~^~~~~~~~~~~~~~~
wild_boar.cpp:131:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 173 ms 278520 KB Output is correct
2 Correct 175 ms 278520 KB Output is correct
3 Correct 163 ms 278520 KB Output is correct
4 Correct 179 ms 278568 KB Output is correct
5 Correct 167 ms 278592 KB Output is correct
6 Correct 160 ms 278520 KB Output is correct
7 Correct 168 ms 278572 KB Output is correct
8 Correct 162 ms 278520 KB Output is correct
9 Correct 159 ms 278520 KB Output is correct
10 Correct 158 ms 278520 KB Output is correct
11 Correct 158 ms 278520 KB Output is correct
12 Correct 156 ms 278528 KB Output is correct
13 Correct 165 ms 278520 KB Output is correct
14 Correct 156 ms 278520 KB Output is correct
15 Correct 175 ms 278480 KB Output is correct
16 Correct 162 ms 278648 KB Output is correct
17 Correct 160 ms 278520 KB Output is correct
18 Correct 165 ms 278520 KB Output is correct
19 Correct 168 ms 278520 KB Output is correct
20 Correct 168 ms 278520 KB Output is correct
21 Correct 164 ms 278520 KB Output is correct
22 Correct 168 ms 278520 KB Output is correct
23 Correct 161 ms 278520 KB Output is correct
24 Correct 174 ms 278492 KB Output is correct
25 Correct 182 ms 278520 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 173 ms 278520 KB Output is correct
2 Correct 175 ms 278520 KB Output is correct
3 Correct 163 ms 278520 KB Output is correct
4 Correct 179 ms 278568 KB Output is correct
5 Correct 167 ms 278592 KB Output is correct
6 Correct 160 ms 278520 KB Output is correct
7 Correct 168 ms 278572 KB Output is correct
8 Correct 162 ms 278520 KB Output is correct
9 Correct 159 ms 278520 KB Output is correct
10 Correct 158 ms 278520 KB Output is correct
11 Correct 158 ms 278520 KB Output is correct
12 Correct 156 ms 278528 KB Output is correct
13 Correct 165 ms 278520 KB Output is correct
14 Correct 156 ms 278520 KB Output is correct
15 Correct 175 ms 278480 KB Output is correct
16 Correct 162 ms 278648 KB Output is correct
17 Correct 160 ms 278520 KB Output is correct
18 Correct 165 ms 278520 KB Output is correct
19 Correct 168 ms 278520 KB Output is correct
20 Correct 168 ms 278520 KB Output is correct
21 Correct 164 ms 278520 KB Output is correct
22 Correct 168 ms 278520 KB Output is correct
23 Correct 161 ms 278520 KB Output is correct
24 Correct 174 ms 278492 KB Output is correct
25 Correct 182 ms 278520 KB Output is correct
26 Correct 162 ms 278904 KB Output is correct
27 Correct 251 ms 280696 KB Output is correct
28 Correct 230 ms 280696 KB Output is correct
29 Correct 324 ms 284792 KB Output is correct
30 Correct 309 ms 284796 KB Output is correct
31 Correct 327 ms 284880 KB Output is correct
32 Correct 317 ms 284868 KB Output is correct
33 Correct 311 ms 285048 KB Output is correct
34 Correct 318 ms 285180 KB Output is correct
35 Correct 309 ms 285080 KB Output is correct
36 Correct 301 ms 285048 KB Output is correct
37 Correct 315 ms 285176 KB Output is correct
38 Correct 304 ms 285304 KB Output is correct
39 Correct 307 ms 285304 KB Output is correct
40 Correct 322 ms 285304 KB Output is correct
41 Correct 311 ms 285432 KB Output is correct
42 Correct 301 ms 285436 KB Output is correct
43 Correct 321 ms 285560 KB Output is correct
44 Correct 314 ms 285560 KB Output is correct
45 Correct 266 ms 285692 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 173 ms 278520 KB Output is correct
2 Correct 175 ms 278520 KB Output is correct
3 Correct 163 ms 278520 KB Output is correct
4 Correct 179 ms 278568 KB Output is correct
5 Correct 167 ms 278592 KB Output is correct
6 Correct 160 ms 278520 KB Output is correct
7 Correct 168 ms 278572 KB Output is correct
8 Correct 162 ms 278520 KB Output is correct
9 Correct 159 ms 278520 KB Output is correct
10 Correct 158 ms 278520 KB Output is correct
11 Correct 158 ms 278520 KB Output is correct
12 Correct 156 ms 278528 KB Output is correct
13 Correct 165 ms 278520 KB Output is correct
14 Correct 156 ms 278520 KB Output is correct
15 Correct 175 ms 278480 KB Output is correct
16 Correct 162 ms 278648 KB Output is correct
17 Correct 160 ms 278520 KB Output is correct
18 Correct 165 ms 278520 KB Output is correct
19 Correct 168 ms 278520 KB Output is correct
20 Correct 168 ms 278520 KB Output is correct
21 Correct 164 ms 278520 KB Output is correct
22 Correct 168 ms 278520 KB Output is correct
23 Correct 161 ms 278520 KB Output is correct
24 Correct 174 ms 278492 KB Output is correct
25 Correct 182 ms 278520 KB Output is correct
26 Correct 162 ms 278904 KB Output is correct
27 Correct 251 ms 280696 KB Output is correct
28 Correct 230 ms 280696 KB Output is correct
29 Correct 324 ms 284792 KB Output is correct
30 Correct 309 ms 284796 KB Output is correct
31 Correct 327 ms 284880 KB Output is correct
32 Correct 317 ms 284868 KB Output is correct
33 Correct 311 ms 285048 KB Output is correct
34 Correct 318 ms 285180 KB Output is correct
35 Correct 309 ms 285080 KB Output is correct
36 Correct 301 ms 285048 KB Output is correct
37 Correct 315 ms 285176 KB Output is correct
38 Correct 304 ms 285304 KB Output is correct
39 Correct 307 ms 285304 KB Output is correct
40 Correct 322 ms 285304 KB Output is correct
41 Correct 311 ms 285432 KB Output is correct
42 Correct 301 ms 285436 KB Output is correct
43 Correct 321 ms 285560 KB Output is correct
44 Correct 314 ms 285560 KB Output is correct
45 Correct 266 ms 285692 KB Output is correct
46 Correct 397 ms 291328 KB Output is correct
47 Correct 6733 ms 410508 KB Output is correct
48 Correct 6134 ms 412324 KB Output is correct
49 Correct 5367 ms 412332 KB Output is correct
50 Correct 5654 ms 413688 KB Output is correct
51 Correct 6345 ms 414308 KB Output is correct
52 Correct 4456 ms 411260 KB Output is correct
53 Correct 4478 ms 411304 KB Output is correct
54 Correct 4557 ms 411348 KB Output is correct
55 Correct 4458 ms 411252 KB Output is correct
56 Correct 4548 ms 411940 KB Output is correct
57 Correct 4602 ms 412728 KB Output is correct
58 Correct 4525 ms 413056 KB Output is correct
59 Correct 4598 ms 413704 KB Output is correct
60 Correct 4470 ms 414328 KB Output is correct
61 Correct 4455 ms 414664 KB Output is correct
62 Correct 4172 ms 415196 KB Output is correct
63 Correct 4035 ms 415604 KB Output is correct
64 Correct 1941 ms 416248 KB Output is correct
65 Correct 1900 ms 416504 KB Output is correct

Subtask #4
38.0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 173 ms 278520 KB Output is correct
2 Correct 175 ms 278520 KB Output is correct
3 Correct 163 ms 278520 KB Output is correct
4 Correct 179 ms 278568 KB Output is correct
5 Correct 167 ms 278592 KB Output is correct
6 Correct 160 ms 278520 KB Output is correct
7 Correct 168 ms 278572 KB Output is correct
8 Correct 162 ms 278520 KB Output is correct
9 Correct 159 ms 278520 KB Output is correct
10 Correct 158 ms 278520 KB Output is correct
11 Correct 158 ms 278520 KB Output is correct
12 Correct 156 ms 278528 KB Output is correct
13 Correct 165 ms 278520 KB Output is correct
14 Correct 156 ms 278520 KB Output is correct
15 Correct 175 ms 278480 KB Output is correct
16 Correct 162 ms 278648 KB Output is correct
17 Correct 160 ms 278520 KB Output is correct
18 Correct 165 ms 278520 KB Output is correct
19 Correct 168 ms 278520 KB Output is correct
20 Correct 168 ms 278520 KB Output is correct
21 Correct 164 ms 278520 KB Output is correct
22 Correct 168 ms 278520 KB Output is correct
23 Correct 161 ms 278520 KB Output is correct
24 Correct 174 ms 278492 KB Output is correct
25 Correct 182 ms 278520 KB Output is correct
26 Correct 162 ms 278904 KB Output is correct
27 Correct 251 ms 280696 KB Output is correct
28 Correct 230 ms 280696 KB Output is correct
29 Correct 324 ms 284792 KB Output is correct
30 Correct 309 ms 284796 KB Output is correct
31 Correct 327 ms 284880 KB Output is correct
32 Correct 317 ms 284868 KB Output is correct
33 Correct 311 ms 285048 KB Output is correct
34 Correct 318 ms 285180 KB Output is correct
35 Correct 309 ms 285080 KB Output is correct
36 Correct 301 ms 285048 KB Output is correct
37 Correct 315 ms 285176 KB Output is correct
38 Correct 304 ms 285304 KB Output is correct
39 Correct 307 ms 285304 KB Output is correct
40 Correct 322 ms 285304 KB Output is correct
41 Correct 311 ms 285432 KB Output is correct
42 Correct 301 ms 285436 KB Output is correct
43 Correct 321 ms 285560 KB Output is correct
44 Correct 314 ms 285560 KB Output is correct
45 Correct 266 ms 285692 KB Output is correct
46 Correct 397 ms 291328 KB Output is correct
47 Correct 6733 ms 410508 KB Output is correct
48 Correct 6134 ms 412324 KB Output is correct
49 Correct 5367 ms 412332 KB Output is correct
50 Correct 5654 ms 413688 KB Output is correct
51 Correct 6345 ms 414308 KB Output is correct
52 Correct 4456 ms 411260 KB Output is correct
53 Correct 4478 ms 411304 KB Output is correct
54 Correct 4557 ms 411348 KB Output is correct
55 Correct 4458 ms 411252 KB Output is correct
56 Correct 4548 ms 411940 KB Output is correct
57 Correct 4602 ms 412728 KB Output is correct
58 Correct 4525 ms 413056 KB Output is correct
59 Correct 4598 ms 413704 KB Output is correct
60 Correct 4470 ms 414328 KB Output is correct
61 Correct 4455 ms 414664 KB Output is correct
62 Correct 4172 ms 415196 KB Output is correct
63 Correct 4035 ms 415604 KB Output is correct
64 Correct 1941 ms 416248 KB Output is correct
65 Correct 1900 ms 416504 KB Output is correct
66 Correct 243 ms 279544 KB Output is correct
67 Correct 1311 ms 323528 KB Output is correct
68 Correct 1810 ms 414908 KB Output is correct
69 Correct 2584 ms 415508 KB Output is correct
70 Correct 3856 ms 416012 KB Output is correct
71 Correct 8972 ms 410512 KB Output is correct
72 Correct 8409 ms 412496 KB Output is correct
73 Correct 6838 ms 412812 KB Output is correct
74 Correct 6871 ms 412716 KB Output is correct
75 Correct 6573 ms 412736 KB Output is correct
76 Correct 7708 ms 412612 KB Output is correct
77 Correct 8111 ms 414260 KB Output is correct
78 Correct 9252 ms 418508 KB Output is correct
79 Correct 6636 ms 413812 KB Output is correct
80 Correct 6704 ms 414712 KB Output is correct
81 Correct 7113 ms 415400 KB Output is correct
82 Correct 6657 ms 415612 KB Output is correct
83 Correct 6697 ms 416032 KB Output is correct
84 Correct 5981 ms 417456 KB Output is correct
85 Correct 4250 ms 417892 KB Output is correct