oj.uz

Submission #769685

# Submission time Handle Problem Language Result Execution time Memory
769685 2023-06-30T03:04:45 Z horiiseun Hotspot (NOI17_hotspot) C++17
100 / 100
 567 ms 1188 KB 
#include <iostream>
#include <vector>
#include <tuple>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <cmath>
#include <random>
#include <string>
#include <cassert>
#include <climits>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
using namespace std;

#define ll long long
#define f first
#define s second

void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(const char *x) { cerr << '\"' << x << '\"'; }
void __print(const string &x) { cerr << '\"' << x << '\"'; }
void __print(bool x) { cerr << (x ? "true" : "false"); }

template<typename A> void __print(const A &x);
template<typename A, typename B> void __print(const pair<A, B> &p);
template<typename... A> void __print(const tuple<A...> &t);
template<typename T> void __print(stack<T> s);
template<typename T> void __print(queue<T> q);
template<typename T, typename... U> void __print(priority_queue<T, U...> q);

template<typename A> void __print(const A &x) {
    bool first = true;
    cerr << '{';
    for (const auto &i : x) {
        cerr << (first ? "" : ","), __print(i);
        first = false;
    }
    cerr << '}';
}

template<typename A, typename B> void __print(const pair<A, B> &p) {
    cerr << '(';
    __print(p.f);
    cerr << ',';
    __print(p.s);
    cerr << ')';
}

template<typename... A> void __print(const tuple<A...> &t) {
    bool first = true;
    cerr << '(';
    apply([&first] (const auto &...args) { ((cerr << (first ? "" : ","), __print(args), first = false), ...); }, t);
    cerr << ')';
}

template<typename T> void __print(stack<T> s) {
    vector<T> debugVector;
    while (!s.empty()) {
        T t = s.top();
        debugVector.push_back(t);
        s.pop();
    }
    reverse(debugVector.begin(), debugVector.end());
    __print(debugVector);
}

template<typename T> void __print(queue<T> q) {
    vector<T> debugVector;
    while (!q.empty()) {
        T t = q.front();
        debugVector.push_back(t);
        q.pop();
    }
    __print(debugVector);
}

template<typename T, typename... U> void __print(priority_queue<T, U...> q) {
    vector<T> debugVector;
    while (!q.empty()) {
        T t = q.top();
        debugVector.push_back(t);
        q.pop();
    }
    __print(debugVector);
}

void _print() { cerr << "]\n"; }

template <typename Head, typename... Tail> void _print(const Head &H, const Tail &...T) {
    __print(H);
    if (sizeof...(T)) cerr << ", ";
    _print(T...);
}

#ifdef DEBUG
	#define D(...) cerr << "Line: " << __LINE__ << " [" << #__VA_ARGS__ << "] = ["; _print(__VA_ARGS__)
#else
	#define D(...)
#endif

const double EPS = numeric_limits<double>::epsilon();

int n, m, qr, a, b, ret;
double ans[5005], mx;
vector<int> adj[5005];

void bfs(int st, vector<pair<int, int>> &dst) {
	dst.resize(n, {-1, 0});
	dst[st].f = 0;
	dst[st].s = 1;
	queue<int> q;
	q.push(st);
	while (!q.empty()) {
		int curr = q.front();
		q.pop();
		
		for (int i : adj[curr]) {
			if (dst[i].f == -1) {
				dst[i].f = dst[curr].f + 1;
				dst[i].s += dst[curr].s;
				q.push(i);
			} else if (dst[i].f == dst[curr].f + 1) {
				dst[i].s += dst[curr].s;
			}
		}
	}
}

int main() {

	ios_base::sync_with_stdio(false);
	cin.tie(0);

	cin >> n >> m;
	for (int i = 0; i < m; i++) {
		cin >> a >> b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}

	cin >> qr;
	while (qr--) {
		cin >> a >> b;
		vector<pair<int, int>> dst1, dst2;
		bfs(a, dst1);
		bfs(b, dst2);
		D(dst1);
		D(dst2);
		for (int i = 0; i < n; i++) {
			if (dst1[i].f + dst2[i].f == dst1[b].f) {
				ans[i] += (double) dst1[i].s * (double) dst2[i].s / (double) dst1[b].s;
			}
		}
	}

	for (int i = 0; i < n; i++) {
		mx = max(mx, ans[i]);
	}
	for (int i = 0; i < n; i++) {
		if (abs(ans[i] - mx) <= EPS) {
			ret = i;
		}
	}

	cout << ret << "\n";

}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 468 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 448 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 444 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 456 KB Output is correct
10 Correct 1 ms 440 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 2 ms 340 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 448 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 444 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 456 KB Output is correct
17 Correct 1 ms 440 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 340 KB Output is correct
22 Correct 1 ms 432 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 3 ms 468 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 468 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 448 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 444 KB Output is correct
15 Correct 2 ms 508 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 3 ms 596 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 3 ms 596 KB Output is correct
20 Correct 2 ms 468 KB Output is correct
21 Correct 1 ms 444 KB Output is correct

Subtask #6
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 468 KB Output is correct
4 Correct 1 ms 440 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 444 KB Output is correct
7 Correct 1 ms 468 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 448 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 440 KB Output is correct
14 Correct 1 ms 444 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 456 KB Output is correct
17 Correct 1 ms 440 KB Output is correct
18 Correct 2 ms 468 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 340 KB Output is correct
22 Correct 1 ms 432 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 3 ms 468 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 468 KB Output is correct
29 Correct 2 ms 508 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 3 ms 596 KB Output is correct
32 Correct 2 ms 468 KB Output is correct
33 Correct 3 ms 596 KB Output is correct
34 Correct 2 ms 468 KB Output is correct
35 Correct 1 ms 444 KB Output is correct
36 Correct 48 ms 652 KB Output is correct
37 Correct 108 ms 776 KB Output is correct
38 Correct 567 ms 1024 KB Output is correct
39 Correct 346 ms 1160 KB Output is correct
40 Correct 59 ms 764 KB Output is correct
41 Correct 334 ms 1112 KB Output is correct
42 Correct 484 ms 1188 KB Output is correct
43 Correct 26 ms 596 KB Output is correct
44 Correct 23 ms 592 KB Output is correct