oj.uz

Submission #1105618

# Submission time Handle Problem Language Result Execution time Memory
1105618 2024-10-27T02:58:59 Z cpptowin Hotspot (NOI17_hotspot) C++17
100 / 100
 1048 ms 1792 KB 
#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 6010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define int long long
#define inf (int)1e9
#define bitcount(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
#define UNIQUE(v) v.erase(unique(all(v)),v.end())
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
const int nsqrt = 450;
const int mod = 1e9 + 7;
void add(int &x, int k)
{
    x += k;
    x %= mod;
    if(x < 0) x += mod;
}
void del(int &x, int k)
{
    x -= k;
    x %= mod;
    if(x < 0) x += mod;
}
int n,m;
vi ke[N];
int d[2][N],f[2][N];
double sum[N];
void dij(int inp,int d[],int f[],int n)
{
    fo(i,0,n - 1) d[i] = inf,f[i] = 0;
    d[inp] = 0;
    f[inp] = 1;
    priority_queue<pii,vii,greater<pii>> q;
    q.push({0,inp});
    while(q.size())
    {
        auto [du,u] = q.top();
        q.pop();
        if(d[u] != du) continue;
        for(int v : ke[u])
        {
            if(minimize(d[v],du + 1))
            {
                f[v] = f[u];
                q.push({d[v],v});
            }
            else if(d[v] == du + 1) f[v] += f[u];
        }
    }
}
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m;
    fo(i,1,m) 
    {
        int u,v;
        cin >> u >> v;
        ke[u].pb(v);
        ke[v].pb(u);
    }
    int q;cin >> q;
    while(q--)
    {
        int u,v;
        cin >> u >> v;
        dij(u,d[0],f[0],n);
        dij(v,d[1],f[1],n);
        fo(i,0,n - 1) if(d[0][i] + d[1][i] == d[0][v])
        {
            sum[i] += 1.0 * (1.0 * f[0][i] * f[1][i]) / f[0][v];
        }
    }
    int ans = 0;
    fo(i,0,n - 1) if(sum[ans] < sum[i]) ans = i;
    cout << ans;
}

Compilation message

hotspot.cpp:85:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   85 | main()
      | ^~~~
hotspot.cpp: In function 'int main()':
hotspot.cpp:90:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
hotspot.cpp:91:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 760 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 592 KB Output is correct
10 Correct 2 ms 592 KB Output is correct
11 Correct 3 ms 592 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 3 ms 760 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 760 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 2 ms 592 KB Output is correct
17 Correct 2 ms 592 KB Output is correct
18 Correct 3 ms 592 KB Output is correct
19 Correct 1 ms 592 KB Output is correct
20 Correct 1 ms 592 KB Output is correct
21 Correct 3 ms 760 KB Output is correct
22 Correct 3 ms 592 KB Output is correct
23 Correct 3 ms 592 KB Output is correct
24 Correct 6 ms 688 KB Output is correct
25 Correct 9 ms 592 KB Output is correct
26 Correct 10 ms 592 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 8 ms 664 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 760 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 1 ms 760 KB Output is correct
17 Correct 5 ms 848 KB Output is correct
18 Correct 3 ms 592 KB Output is correct
19 Correct 5 ms 848 KB Output is correct
20 Correct 2 ms 592 KB Output is correct
21 Correct 1 ms 592 KB Output is correct

Subtask #6
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 592 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 1 ms 592 KB Output is correct
4 Correct 1 ms 592 KB Output is correct
5 Correct 1 ms 592 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 1 ms 592 KB Output is correct
8 Correct 1 ms 592 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 592 KB Output is correct
11 Correct 1 ms 760 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 592 KB Output is correct
14 Correct 1 ms 592 KB Output is correct
15 Correct 2 ms 592 KB Output is correct
16 Correct 2 ms 592 KB Output is correct
17 Correct 2 ms 592 KB Output is correct
18 Correct 3 ms 592 KB Output is correct
19 Correct 1 ms 592 KB Output is correct
20 Correct 1 ms 592 KB Output is correct
21 Correct 3 ms 760 KB Output is correct
22 Correct 3 ms 592 KB Output is correct
23 Correct 3 ms 592 KB Output is correct
24 Correct 6 ms 688 KB Output is correct
25 Correct 9 ms 592 KB Output is correct
26 Correct 10 ms 592 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 8 ms 664 KB Output is correct
29 Correct 2 ms 592 KB Output is correct
30 Correct 1 ms 760 KB Output is correct
31 Correct 5 ms 848 KB Output is correct
32 Correct 3 ms 592 KB Output is correct
33 Correct 5 ms 848 KB Output is correct
34 Correct 2 ms 592 KB Output is correct
35 Correct 1 ms 592 KB Output is correct
36 Correct 52 ms 848 KB Output is correct
37 Correct 188 ms 1104 KB Output is correct
38 Correct 1048 ms 1616 KB Output is correct
39 Correct 488 ms 1792 KB Output is correct
40 Correct 148 ms 848 KB Output is correct
41 Correct 729 ms 1732 KB Output is correct
42 Correct 723 ms 1616 KB Output is correct
43 Correct 63 ms 848 KB Output is correct
44 Correct 54 ms 848 KB Output is correct