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답안 #243196

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
243196 2020-06-30T14:18:23 Z mhy908 Wild Boar (JOI18_wild_boar) C++14
12 / 100
 1546 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[e+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[e+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));
                }
            }
            proc[i][j]=NODE();
            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:122:35: 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:126:14: 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 160 ms 278648 KB Output is correct
2 Correct 158 ms 278520 KB Output is correct
3 Correct 160 ms 278520 KB Output is correct
4 Correct 158 ms 278524 KB Output is correct
5 Correct 162 ms 278520 KB Output is correct
6 Correct 157 ms 278520 KB Output is correct
7 Correct 179 ms 278484 KB Output is correct
8 Correct 164 ms 278520 KB Output is correct
9 Correct 157 ms 278520 KB Output is correct
10 Correct 166 ms 278520 KB Output is correct
11 Correct 159 ms 278496 KB Output is correct
12 Correct 162 ms 278520 KB Output is correct
13 Correct 159 ms 278520 KB Output is correct
14 Correct 158 ms 278588 KB Output is correct
15 Correct 179 ms 278516 KB Output is correct
16 Correct 156 ms 278520 KB Output is correct
17 Correct 157 ms 278520 KB Output is correct
18 Correct 158 ms 278520 KB Output is correct
19 Correct 167 ms 278636 KB Output is correct
20 Correct 164 ms 278520 KB Output is correct
21 Correct 156 ms 278520 KB Output is correct
22 Correct 169 ms 278520 KB Output is correct
23 Correct 158 ms 278520 KB Output is correct
24 Correct 156 ms 278520 KB Output is correct
25 Correct 155 ms 278520 KB Output is correct

Subtask #2
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 160 ms 278648 KB Output is correct
2 Correct 158 ms 278520 KB Output is correct
3 Correct 160 ms 278520 KB Output is correct
4 Correct 158 ms 278524 KB Output is correct
5 Correct 162 ms 278520 KB Output is correct
6 Correct 157 ms 278520 KB Output is correct
7 Correct 179 ms 278484 KB Output is correct
8 Correct 164 ms 278520 KB Output is correct
9 Correct 157 ms 278520 KB Output is correct
10 Correct 166 ms 278520 KB Output is correct
11 Correct 159 ms 278496 KB Output is correct
12 Correct 162 ms 278520 KB Output is correct
13 Correct 159 ms 278520 KB Output is correct
14 Correct 158 ms 278588 KB Output is correct
15 Correct 179 ms 278516 KB Output is correct
16 Correct 156 ms 278520 KB Output is correct
17 Correct 157 ms 278520 KB Output is correct
18 Correct 158 ms 278520 KB Output is correct
19 Correct 167 ms 278636 KB Output is correct
20 Correct 164 ms 278520 KB Output is correct
21 Correct 156 ms 278520 KB Output is correct
22 Correct 169 ms 278520 KB Output is correct
23 Correct 158 ms 278520 KB Output is correct
24 Correct 156 ms 278520 KB Output is correct
25 Correct 155 ms 278520 KB Output is correct
26 Correct 171 ms 278872 KB Output is correct
27 Correct 226 ms 280440 KB Output is correct
28 Correct 227 ms 280312 KB Output is correct
29 Correct 495 ms 284768 KB Output is correct
30 Correct 786 ms 284640 KB Output is correct
31 Correct 1546 ms 284840 KB Output is correct
32 Correct 1492 ms 284740 KB Output is correct
33 Correct 406 ms 284924 KB Output is correct
34 Correct 404 ms 284664 KB Output is correct
35 Correct 1282 ms 285064 KB Output is correct
36 Correct 979 ms 284920 KB Output is correct
37 Correct 421 ms 284804 KB Output is correct
38 Correct 389 ms 284920 KB Output is correct
39 Correct 556 ms 285048 KB Output is correct
40 Correct 356 ms 284924 KB Output is correct
41 Correct 370 ms 284924 KB Output is correct
42 Correct 479 ms 285308 KB Output is correct
43 Correct 315 ms 285180 KB Output is correct
44 Correct 323 ms 285304 KB Output is correct
45 Incorrect 261 ms 285432 KB Output isn't correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 160 ms 278648 KB Output is correct
2 Correct 158 ms 278520 KB Output is correct
3 Correct 160 ms 278520 KB Output is correct
4 Correct 158 ms 278524 KB Output is correct
5 Correct 162 ms 278520 KB Output is correct
6 Correct 157 ms 278520 KB Output is correct
7 Correct 179 ms 278484 KB Output is correct
8 Correct 164 ms 278520 KB Output is correct
9 Correct 157 ms 278520 KB Output is correct
10 Correct 166 ms 278520 KB Output is correct
11 Correct 159 ms 278496 KB Output is correct
12 Correct 162 ms 278520 KB Output is correct
13 Correct 159 ms 278520 KB Output is correct
14 Correct 158 ms 278588 KB Output is correct
15 Correct 179 ms 278516 KB Output is correct
16 Correct 156 ms 278520 KB Output is correct
17 Correct 157 ms 278520 KB Output is correct
18 Correct 158 ms 278520 KB Output is correct
19 Correct 167 ms 278636 KB Output is correct
20 Correct 164 ms 278520 KB Output is correct
21 Correct 156 ms 278520 KB Output is correct
22 Correct 169 ms 278520 KB Output is correct
23 Correct 158 ms 278520 KB Output is correct
24 Correct 156 ms 278520 KB Output is correct
25 Correct 155 ms 278520 KB Output is correct
26 Correct 171 ms 278872 KB Output is correct
27 Correct 226 ms 280440 KB Output is correct
28 Correct 227 ms 280312 KB Output is correct
29 Correct 495 ms 284768 KB Output is correct
30 Correct 786 ms 284640 KB Output is correct
31 Correct 1546 ms 284840 KB Output is correct
32 Correct 1492 ms 284740 KB Output is correct
33 Correct 406 ms 284924 KB Output is correct
34 Correct 404 ms 284664 KB Output is correct
35 Correct 1282 ms 285064 KB Output is correct
36 Correct 979 ms 284920 KB Output is correct
37 Correct 421 ms 284804 KB Output is correct
38 Correct 389 ms 284920 KB Output is correct
39 Correct 556 ms 285048 KB Output is correct
40 Correct 356 ms 284924 KB Output is correct
41 Correct 370 ms 284924 KB Output is correct
42 Correct 479 ms 285308 KB Output is correct
43 Correct 315 ms 285180 KB Output is correct
44 Correct 323 ms 285304 KB Output is correct
45 Incorrect 261 ms 285432 KB Output isn't correct

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 160 ms 278648 KB Output is correct
2 Correct 158 ms 278520 KB Output is correct
3 Correct 160 ms 278520 KB Output is correct
4 Correct 158 ms 278524 KB Output is correct
5 Correct 162 ms 278520 KB Output is correct
6 Correct 157 ms 278520 KB Output is correct
7 Correct 179 ms 278484 KB Output is correct
8 Correct 164 ms 278520 KB Output is correct
9 Correct 157 ms 278520 KB Output is correct
10 Correct 166 ms 278520 KB Output is correct
11 Correct 159 ms 278496 KB Output is correct
12 Correct 162 ms 278520 KB Output is correct
13 Correct 159 ms 278520 KB Output is correct
14 Correct 158 ms 278588 KB Output is correct
15 Correct 179 ms 278516 KB Output is correct
16 Correct 156 ms 278520 KB Output is correct
17 Correct 157 ms 278520 KB Output is correct
18 Correct 158 ms 278520 KB Output is correct
19 Correct 167 ms 278636 KB Output is correct
20 Correct 164 ms 278520 KB Output is correct
21 Correct 156 ms 278520 KB Output is correct
22 Correct 169 ms 278520 KB Output is correct
23 Correct 158 ms 278520 KB Output is correct
24 Correct 156 ms 278520 KB Output is correct
25 Correct 155 ms 278520 KB Output is correct
26 Correct 171 ms 278872 KB Output is correct
27 Correct 226 ms 280440 KB Output is correct
28 Correct 227 ms 280312 KB Output is correct
29 Correct 495 ms 284768 KB Output is correct
30 Correct 786 ms 284640 KB Output is correct
31 Correct 1546 ms 284840 KB Output is correct
32 Correct 1492 ms 284740 KB Output is correct
33 Correct 406 ms 284924 KB Output is correct
34 Correct 404 ms 284664 KB Output is correct
35 Correct 1282 ms 285064 KB Output is correct
36 Correct 979 ms 284920 KB Output is correct
37 Correct 421 ms 284804 KB Output is correct
38 Correct 389 ms 284920 KB Output is correct
39 Correct 556 ms 285048 KB Output is correct
40 Correct 356 ms 284924 KB Output is correct
41 Correct 370 ms 284924 KB Output is correct
42 Correct 479 ms 285308 KB Output is correct
43 Correct 315 ms 285180 KB Output is correct
44 Correct 323 ms 285304 KB Output is correct
45 Incorrect 261 ms 285432 KB Output isn't correct