oj.uz

Submission #155933

# Submission time Handle Problem Language Result Execution time Memory
155933 2019-10-02T05:43:44 Z Akashi 007 (CEOI14_007) C++14
30 / 100
 434 ms 17912 KB 
#include <bits/stdc++.h>
using namespace std;

int n, m;
bool viz[200005];
int s, d, a, b;
int da[200005], db[200005], ds[200005], dd[200005];
queue <int> q;
vector <int> v[200005];

void bfs(int nod, int d[]){
    for(int i = 1; i <= n ; ++i) d[i] = 1e9;
    memset(viz, 0, sizeof(viz));

    q.push(nod);
    d[nod] = 0; viz[nod] = 1;
    while(!q.empty()){
        int nod = q.front();
        q.pop();

        for(auto it : v[nod]){
            if(viz[it]) continue ;
            q.push(it);
            viz[it] = 1;
            d[it] = d[nod] + 1;
        }
    }
}

int main()
{
//    freopen("1.in", "r", stdin);
    scanf("%d%d", &n, &m);
    scanf("%d%d%d%d", &s, &d, &a, &b);

    int x, y;
    for(int i = 1; i <= m ; ++i){
        scanf("%d%d", &x, &y);
        v[x].push_back(y);
        v[y].push_back(x);
    }

    bfs(a, da);
    bfs(b, db);
    bfs(s, ds);
    bfs(d, dd);

    if(dd[b] < ds[b] || dd[a] < ds[a]){
        printf("-1");
        return 0;
    }

    int tmp = -1;
    if(dd[b] - ds[b] != dd[a] - ds[a])
        tmp = min(dd[b] - ds[b], dd[a] - ds[a]);
    else{
        int dif = min(dd[b] - ds[b], dd[a] - ds[a]), nr1 = 0, nr2 = 0;
        for(int i = 1; i <= n ; ++i)
            if(da[i] == db[i] && da[i] + ds[i] == ds[a]) nr1 = max(nr1, ds[i]);

        for(int i = 1; i <= n ; ++i)
            if(da[i] == db[i] && da[i] + dd[i] == dd[a]) nr2 = max(nr2, dd[i]);

        if(nr1 > nr2 - dif) tmp = min(dd[b] - ds[b], dd[a] - ds[a]);
        else tmp = min(dd[b] - ds[b], dd[a] - ds[a]) - 1;
    }

    printf("%d", tmp);

    return 0;
}

Compilation message

007.cpp: In function 'int main()':
007.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
007.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d", &s, &d, &a, &b);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
9.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5240 KB Output is correct
2 Correct 6 ms 5240 KB Output is correct
3 Partially correct 6 ms 5240 KB Partially correct
4 Correct 6 ms 5240 KB Output is correct
5 Correct 6 ms 5240 KB Output is correct
6 Partially correct 6 ms 5240 KB Partially correct
7 Partially correct 6 ms 5240 KB Partially correct
8 Correct 6 ms 5240 KB Output is correct
9 Partially correct 6 ms 5240 KB Partially correct
10 Correct 6 ms 5240 KB Output is correct
11 Correct 6 ms 5240 KB Output is correct
12 Correct 6 ms 5240 KB Output is correct
13 Partially correct 7 ms 5212 KB Partially correct
14 Correct 6 ms 5240 KB Output is correct
15 Correct 6 ms 5240 KB Output is correct
16 Correct 7 ms 5240 KB Output is correct
17 Correct 7 ms 5240 KB Output is correct
18 Correct 7 ms 5240 KB Output is correct
19 Partially correct 7 ms 5340 KB Partially correct
20 Correct 7 ms 5240 KB Output is correct
21 Correct 6 ms 5240 KB Output is correct
22 Correct 7 ms 5240 KB Output is correct
23 Partially correct 7 ms 5212 KB Partially correct
24 Correct 7 ms 5240 KB Output is correct

Subtask #2
21.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 7160 KB Output is correct
2 Correct 47 ms 8056 KB Output is correct
3 Partially correct 40 ms 7164 KB Partially correct
4 Correct 56 ms 8184 KB Output is correct
5 Correct 35 ms 7032 KB Output is correct
6 Correct 39 ms 7288 KB Output is correct
7 Correct 42 ms 7544 KB Output is correct
8 Correct 46 ms 7484 KB Output is correct
9 Correct 54 ms 7928 KB Output is correct
10 Partially correct 190 ms 12448 KB Partially correct
11 Correct 94 ms 9560 KB Output is correct
12 Partially correct 110 ms 10492 KB Partially correct
13 Correct 96 ms 9720 KB Output is correct
14 Correct 79 ms 9080 KB Output is correct
15 Correct 121 ms 10672 KB Output is correct
16 Correct 109 ms 11000 KB Output is correct
17 Correct 106 ms 10308 KB Output is correct
18 Correct 97 ms 10360 KB Output is correct
19 Partially correct 138 ms 11640 KB Partially correct
20 Correct 244 ms 14508 KB Output is correct
21 Correct 170 ms 12896 KB Output is correct
22 Partially correct 153 ms 11768 KB Partially correct
23 Correct 153 ms 12660 KB Output is correct
24 Partially correct 137 ms 12492 KB Partially correct
25 Correct 127 ms 12152 KB Output is correct
26 Correct 125 ms 11976 KB Output is correct
27 Correct 176 ms 12792 KB Output is correct
28 Correct 203 ms 12920 KB Output is correct
29 Partially correct 190 ms 13228 KB Partially correct
30 Correct 273 ms 15156 KB Output is correct
31 Correct 210 ms 13900 KB Output is correct
32 Partially correct 155 ms 12792 KB Partially correct
33 Correct 165 ms 13020 KB Output is correct
34 Correct 183 ms 13276 KB Output is correct
35 Correct 174 ms 13048 KB Output is correct
36 Correct 179 ms 13392 KB Output is correct
37 Correct 213 ms 14328 KB Output is correct
38 Correct 272 ms 14160 KB Output is correct
39 Correct 246 ms 14200 KB Output is correct
40 Correct 290 ms 15716 KB Output is correct
41 Partially correct 434 ms 17912 KB Partially correct