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답안 #243178

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
243178 2020-06-30T13:48:41 Z mhy908 Wild Boar (JOI18_wild_boar) C++14
12 / 100
 1500 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){
    for(int i=1; i<=re; i++){
        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(min(llinf, 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));
                }
            }
            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:84:10: 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:87:14: 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:123:35: 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:127:14: 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 187 ms 278524 KB Output is correct
2 Correct 162 ms 278648 KB Output is correct
3 Correct 165 ms 278560 KB Output is correct
4 Correct 157 ms 278520 KB Output is correct
5 Correct 162 ms 278648 KB Output is correct
6 Correct 161 ms 278520 KB Output is correct
7 Correct 155 ms 278520 KB Output is correct
8 Correct 159 ms 278520 KB Output is correct
9 Correct 162 ms 278520 KB Output is correct
10 Correct 169 ms 278648 KB Output is correct
11 Correct 161 ms 278520 KB Output is correct
12 Correct 175 ms 278648 KB Output is correct
13 Correct 164 ms 278520 KB Output is correct
14 Correct 159 ms 278508 KB Output is correct
15 Correct 174 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 162 ms 278520 KB Output is correct
18 Correct 173 ms 278520 KB Output is correct
19 Correct 158 ms 278596 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278520 KB Output is correct
22 Correct 161 ms 278520 KB Output is correct
23 Correct 155 ms 278472 KB Output is correct
24 Correct 195 ms 278648 KB Output is correct
25 Correct 162 ms 278520 KB Output is correct

Subtask #2
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 187 ms 278524 KB Output is correct
2 Correct 162 ms 278648 KB Output is correct
3 Correct 165 ms 278560 KB Output is correct
4 Correct 157 ms 278520 KB Output is correct
5 Correct 162 ms 278648 KB Output is correct
6 Correct 161 ms 278520 KB Output is correct
7 Correct 155 ms 278520 KB Output is correct
8 Correct 159 ms 278520 KB Output is correct
9 Correct 162 ms 278520 KB Output is correct
10 Correct 169 ms 278648 KB Output is correct
11 Correct 161 ms 278520 KB Output is correct
12 Correct 175 ms 278648 KB Output is correct
13 Correct 164 ms 278520 KB Output is correct
14 Correct 159 ms 278508 KB Output is correct
15 Correct 174 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 162 ms 278520 KB Output is correct
18 Correct 173 ms 278520 KB Output is correct
19 Correct 158 ms 278596 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278520 KB Output is correct
22 Correct 161 ms 278520 KB Output is correct
23 Correct 155 ms 278472 KB Output is correct
24 Correct 195 ms 278648 KB Output is correct
25 Correct 162 ms 278520 KB Output is correct
26 Correct 165 ms 278904 KB Output is correct
27 Correct 254 ms 280440 KB Output is correct
28 Correct 227 ms 280440 KB Output is correct
29 Correct 504 ms 284664 KB Output is correct
30 Correct 776 ms 284800 KB Output is correct
31 Correct 1500 ms 284816 KB Output is correct
32 Correct 1490 ms 284840 KB Output is correct
33 Correct 411 ms 284768 KB Output is correct
34 Correct 420 ms 284920 KB Output is correct
35 Correct 1233 ms 285036 KB Output is correct
36 Correct 957 ms 284920 KB Output is correct
37 Correct 423 ms 284920 KB Output is correct
38 Correct 378 ms 285048 KB Output is correct
39 Correct 582 ms 285152 KB Output is correct
40 Correct 387 ms 285028 KB Output is correct
41 Correct 362 ms 285052 KB Output is correct
42 Correct 492 ms 285304 KB Output is correct
43 Correct 334 ms 285176 KB Output is correct
44 Correct 346 ms 285304 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 187 ms 278524 KB Output is correct
2 Correct 162 ms 278648 KB Output is correct
3 Correct 165 ms 278560 KB Output is correct
4 Correct 157 ms 278520 KB Output is correct
5 Correct 162 ms 278648 KB Output is correct
6 Correct 161 ms 278520 KB Output is correct
7 Correct 155 ms 278520 KB Output is correct
8 Correct 159 ms 278520 KB Output is correct
9 Correct 162 ms 278520 KB Output is correct
10 Correct 169 ms 278648 KB Output is correct
11 Correct 161 ms 278520 KB Output is correct
12 Correct 175 ms 278648 KB Output is correct
13 Correct 164 ms 278520 KB Output is correct
14 Correct 159 ms 278508 KB Output is correct
15 Correct 174 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 162 ms 278520 KB Output is correct
18 Correct 173 ms 278520 KB Output is correct
19 Correct 158 ms 278596 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278520 KB Output is correct
22 Correct 161 ms 278520 KB Output is correct
23 Correct 155 ms 278472 KB Output is correct
24 Correct 195 ms 278648 KB Output is correct
25 Correct 162 ms 278520 KB Output is correct
26 Correct 165 ms 278904 KB Output is correct
27 Correct 254 ms 280440 KB Output is correct
28 Correct 227 ms 280440 KB Output is correct
29 Correct 504 ms 284664 KB Output is correct
30 Correct 776 ms 284800 KB Output is correct
31 Correct 1500 ms 284816 KB Output is correct
32 Correct 1490 ms 284840 KB Output is correct
33 Correct 411 ms 284768 KB Output is correct
34 Correct 420 ms 284920 KB Output is correct
35 Correct 1233 ms 285036 KB Output is correct
36 Correct 957 ms 284920 KB Output is correct
37 Correct 423 ms 284920 KB Output is correct
38 Correct 378 ms 285048 KB Output is correct
39 Correct 582 ms 285152 KB Output is correct
40 Correct 387 ms 285028 KB Output is correct
41 Correct 362 ms 285052 KB Output is correct
42 Correct 492 ms 285304 KB Output is correct
43 Correct 334 ms 285176 KB Output is correct
44 Correct 346 ms 285304 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 187 ms 278524 KB Output is correct
2 Correct 162 ms 278648 KB Output is correct
3 Correct 165 ms 278560 KB Output is correct
4 Correct 157 ms 278520 KB Output is correct
5 Correct 162 ms 278648 KB Output is correct
6 Correct 161 ms 278520 KB Output is correct
7 Correct 155 ms 278520 KB Output is correct
8 Correct 159 ms 278520 KB Output is correct
9 Correct 162 ms 278520 KB Output is correct
10 Correct 169 ms 278648 KB Output is correct
11 Correct 161 ms 278520 KB Output is correct
12 Correct 175 ms 278648 KB Output is correct
13 Correct 164 ms 278520 KB Output is correct
14 Correct 159 ms 278508 KB Output is correct
15 Correct 174 ms 278520 KB Output is correct
16 Correct 155 ms 278520 KB Output is correct
17 Correct 162 ms 278520 KB Output is correct
18 Correct 173 ms 278520 KB Output is correct
19 Correct 158 ms 278596 KB Output is correct
20 Correct 158 ms 278520 KB Output is correct
21 Correct 162 ms 278520 KB Output is correct
22 Correct 161 ms 278520 KB Output is correct
23 Correct 155 ms 278472 KB Output is correct
24 Correct 195 ms 278648 KB Output is correct
25 Correct 162 ms 278520 KB Output is correct
26 Correct 165 ms 278904 KB Output is correct
27 Correct 254 ms 280440 KB Output is correct
28 Correct 227 ms 280440 KB Output is correct
29 Correct 504 ms 284664 KB Output is correct
30 Correct 776 ms 284800 KB Output is correct
31 Correct 1500 ms 284816 KB Output is correct
32 Correct 1490 ms 284840 KB Output is correct
33 Correct 411 ms 284768 KB Output is correct
34 Correct 420 ms 284920 KB Output is correct
35 Correct 1233 ms 285036 KB Output is correct
36 Correct 957 ms 284920 KB Output is correct
37 Correct 423 ms 284920 KB Output is correct
38 Correct 378 ms 285048 KB Output is correct
39 Correct 582 ms 285152 KB Output is correct
40 Correct 387 ms 285028 KB Output is correct
41 Correct 362 ms 285052 KB Output is correct
42 Correct 492 ms 285304 KB Output is correct
43 Correct 334 ms 285176 KB Output is correct
44 Correct 346 ms 285304 KB Output is correct
45 Incorrect 268 ms 285432 KB Output isn't correct