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답안 #243206

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
243206 2020-06-30T14:34:04 Z mhy908 Wild Boar (JOI18_wild_boar) C++14
12 / 100
 1485 ms 285432 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=2000000000000000;

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

priority_queue<pair<LL, pii>, vector<pair<LL, pii> >, greater<pair<LL, pii> > > pq;
void do_dijk(int s, int e){
    pq.push(mp(0ll, mp(s, e)));
    while(!pq.empty()){
        LL d=pq.top().F;
        int fr=pq.top().S.F, nw=pq.top().S.S;
        pq.pop();
        if(d>=dist[num[s][e]][num[fr][nw]])continue;
        dist[num[s][e]][num[fr][nw]]=d;
        for(auto j:link[nw]){
            if(j.F!=fr)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<=2*m; i++){
        for(int j=1; j<=2*m; 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:82:10: 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:85:14: 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:121:35: 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:125:14: 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 155 ms 278520 KB Output is correct
2 Correct 156 ms 278520 KB Output is correct
3 Correct 175 ms 278520 KB Output is correct
4 Correct 166 ms 278776 KB Output is correct
5 Correct 163 ms 278520 KB Output is correct
6 Correct 164 ms 278520 KB Output is correct
7 Correct 160 ms 278568 KB Output is correct
8 Correct 154 ms 278520 KB Output is correct
9 Correct 173 ms 278520 KB Output is correct
10 Correct 160 ms 278520 KB Output is correct
11 Correct 160 ms 278648 KB Output is correct
12 Correct 160 ms 278520 KB Output is correct
13 Correct 155 ms 278520 KB Output is correct
14 Correct 160 ms 278520 KB Output is correct
15 Correct 163 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 159 ms 278520 KB Output is correct
18 Correct 158 ms 278648 KB Output is correct
19 Correct 156 ms 278520 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278512 KB Output is correct
22 Correct 155 ms 278520 KB Output is correct
23 Correct 156 ms 278520 KB Output is correct
24 Correct 159 ms 278520 KB Output is correct
25 Correct 163 ms 278520 KB Output is correct

Subtask #2
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 155 ms 278520 KB Output is correct
2 Correct 156 ms 278520 KB Output is correct
3 Correct 175 ms 278520 KB Output is correct
4 Correct 166 ms 278776 KB Output is correct
5 Correct 163 ms 278520 KB Output is correct
6 Correct 164 ms 278520 KB Output is correct
7 Correct 160 ms 278568 KB Output is correct
8 Correct 154 ms 278520 KB Output is correct
9 Correct 173 ms 278520 KB Output is correct
10 Correct 160 ms 278520 KB Output is correct
11 Correct 160 ms 278648 KB Output is correct
12 Correct 160 ms 278520 KB Output is correct
13 Correct 155 ms 278520 KB Output is correct
14 Correct 160 ms 278520 KB Output is correct
15 Correct 163 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 159 ms 278520 KB Output is correct
18 Correct 158 ms 278648 KB Output is correct
19 Correct 156 ms 278520 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278512 KB Output is correct
22 Correct 155 ms 278520 KB Output is correct
23 Correct 156 ms 278520 KB Output is correct
24 Correct 159 ms 278520 KB Output is correct
25 Correct 163 ms 278520 KB Output is correct
26 Correct 164 ms 278904 KB Output is correct
27 Correct 222 ms 280440 KB Output is correct
28 Correct 235 ms 280440 KB Output is correct
29 Correct 503 ms 284536 KB Output is correct
30 Correct 756 ms 284668 KB Output is correct
31 Correct 1481 ms 284840 KB Output is correct
32 Correct 1485 ms 284724 KB Output is correct
33 Correct 406 ms 284920 KB Output is correct
34 Correct 405 ms 284920 KB Output is correct
35 Correct 1220 ms 285080 KB Output is correct
36 Correct 947 ms 284920 KB Output is correct
37 Correct 397 ms 284792 KB Output is correct
38 Correct 363 ms 285152 KB Output is correct
39 Correct 570 ms 285048 KB Output is correct
40 Correct 393 ms 284920 KB Output is correct
41 Correct 355 ms 285176 KB Output is correct
42 Correct 490 ms 285232 KB Output is correct
43 Correct 327 ms 285304 KB Output is correct
44 Correct 318 ms 285176 KB Output is correct
45 Incorrect 268 ms 285432 KB Output isn't correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 155 ms 278520 KB Output is correct
2 Correct 156 ms 278520 KB Output is correct
3 Correct 175 ms 278520 KB Output is correct
4 Correct 166 ms 278776 KB Output is correct
5 Correct 163 ms 278520 KB Output is correct
6 Correct 164 ms 278520 KB Output is correct
7 Correct 160 ms 278568 KB Output is correct
8 Correct 154 ms 278520 KB Output is correct
9 Correct 173 ms 278520 KB Output is correct
10 Correct 160 ms 278520 KB Output is correct
11 Correct 160 ms 278648 KB Output is correct
12 Correct 160 ms 278520 KB Output is correct
13 Correct 155 ms 278520 KB Output is correct
14 Correct 160 ms 278520 KB Output is correct
15 Correct 163 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 159 ms 278520 KB Output is correct
18 Correct 158 ms 278648 KB Output is correct
19 Correct 156 ms 278520 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278512 KB Output is correct
22 Correct 155 ms 278520 KB Output is correct
23 Correct 156 ms 278520 KB Output is correct
24 Correct 159 ms 278520 KB Output is correct
25 Correct 163 ms 278520 KB Output is correct
26 Correct 164 ms 278904 KB Output is correct
27 Correct 222 ms 280440 KB Output is correct
28 Correct 235 ms 280440 KB Output is correct
29 Correct 503 ms 284536 KB Output is correct
30 Correct 756 ms 284668 KB Output is correct
31 Correct 1481 ms 284840 KB Output is correct
32 Correct 1485 ms 284724 KB Output is correct
33 Correct 406 ms 284920 KB Output is correct
34 Correct 405 ms 284920 KB Output is correct
35 Correct 1220 ms 285080 KB Output is correct
36 Correct 947 ms 284920 KB Output is correct
37 Correct 397 ms 284792 KB Output is correct
38 Correct 363 ms 285152 KB Output is correct
39 Correct 570 ms 285048 KB Output is correct
40 Correct 393 ms 284920 KB Output is correct
41 Correct 355 ms 285176 KB Output is correct
42 Correct 490 ms 285232 KB Output is correct
43 Correct 327 ms 285304 KB Output is correct
44 Correct 318 ms 285176 KB Output is correct
45 Incorrect 268 ms 285432 KB Output isn't correct

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 155 ms 278520 KB Output is correct
2 Correct 156 ms 278520 KB Output is correct
3 Correct 175 ms 278520 KB Output is correct
4 Correct 166 ms 278776 KB Output is correct
5 Correct 163 ms 278520 KB Output is correct
6 Correct 164 ms 278520 KB Output is correct
7 Correct 160 ms 278568 KB Output is correct
8 Correct 154 ms 278520 KB Output is correct
9 Correct 173 ms 278520 KB Output is correct
10 Correct 160 ms 278520 KB Output is correct
11 Correct 160 ms 278648 KB Output is correct
12 Correct 160 ms 278520 KB Output is correct
13 Correct 155 ms 278520 KB Output is correct
14 Correct 160 ms 278520 KB Output is correct
15 Correct 163 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 159 ms 278520 KB Output is correct
18 Correct 158 ms 278648 KB Output is correct
19 Correct 156 ms 278520 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278512 KB Output is correct
22 Correct 155 ms 278520 KB Output is correct
23 Correct 156 ms 278520 KB Output is correct
24 Correct 159 ms 278520 KB Output is correct
25 Correct 163 ms 278520 KB Output is correct
26 Correct 164 ms 278904 KB Output is correct
27 Correct 222 ms 280440 KB Output is correct
28 Correct 235 ms 280440 KB Output is correct
29 Correct 503 ms 284536 KB Output is correct
30 Correct 756 ms 284668 KB Output is correct
31 Correct 1481 ms 284840 KB Output is correct
32 Correct 1485 ms 284724 KB Output is correct
33 Correct 406 ms 284920 KB Output is correct
34 Correct 405 ms 284920 KB Output is correct
35 Correct 1220 ms 285080 KB Output is correct
36 Correct 947 ms 284920 KB Output is correct
37 Correct 397 ms 284792 KB Output is correct
38 Correct 363 ms 285152 KB Output is correct
39 Correct 570 ms 285048 KB Output is correct
40 Correct 393 ms 284920 KB Output is correct
41 Correct 355 ms 285176 KB Output is correct
42 Correct 490 ms 285232 KB Output is correct
43 Correct 327 ms 285304 KB Output is correct
44 Correct 318 ms 285176 KB Output is correct
45 Incorrect 268 ms 285432 KB Output isn't correct