oj.uz

Submission #810524

# Submission time Handle Problem Language Result Execution time Memory
810524 2023-08-06T10:46:14 Z AkramElOmrani Ideal city (IOI12_city) C++17
32 / 100
 1000 ms 3256 KB 
#include <bits/stdc++.h>
using namespace std;
 
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
 
void dbg_out() { cerr << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cerr << ' ' << H; dbg_out(T...); }
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__);
 
const int mod = 1e9;
void add(int& a, int b) {
  a += b;
  if(a > mod) {
	a -= mod;
  }
}
vector<pair<int, int>> dir = {{-1, 0}, {1, 0}, {0, 1}, {0, -1}};
 
int DistanceSum(int n, int *X, int *Y) {
	int sum = 0;
	vector<vector<int>> adj(n);
	map<pair<int, int>, int> mp;
	for(int i = 0; i < n; ++i) {
		mp[{X[i], Y[i]}] = i;
	}
	for(int i = 0; i < n; ++i) {
		for(auto[row, col] : dir) {
			row += X[i];
			col += Y[i];
			auto it = mp.find({row, col});
			if(it == mp.end()) continue;
			adj[i].push_back(it->second);
			adj[it->second].push_back(i);
		}
	}
	const int INF = 1e9 + 5;
	int ans = 0;
	for(int i = 0; i < n; ++i) {
	// start a bfs
	vector<int> dist(n, INF);
	queue<int> q;
	q.push(i);
	dist[i] = 0;
	while(!q.empty()) {
	  int sz = q.size();
	  for(int i = 0; i < sz; ++i) {
		int p = q.front(); q.pop();
		for(int x : adj[p]) {
			if(dist[x] != INF) continue;
		  	dist[x] = dist[p] + 1;
		  	q.push(x);
		}
	  }
	}
	// dbg(dist)
	for(int j = i + 1; j < n; ++j) {
	  add(ans, dist[j]);
	  // dbg(ans, dist[j])
	}
  }
  return ans;
}

Compilation message

city.cpp: In function 'int DistanceSum(int, int*, int*)':
city.cpp:21:6: warning: unused variable 'sum' [-Wunused-variable]
   21 |  int sum = 0;
      |      ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 452 KB Output is correct
2 Correct 23 ms 340 KB Output is correct
3 Correct 53 ms 500 KB Output is correct
4 Correct 56 ms 516 KB Output is correct
5 Correct 98 ms 596 KB Output is correct
6 Correct 99 ms 568 KB Output is correct
7 Correct 105 ms 596 KB Output is correct
8 Correct 104 ms 620 KB Output is correct
9 Correct 100 ms 624 KB Output is correct
10 Correct 100 ms 616 KB Output is correct

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1076 ms 3256 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1067 ms 3080 KB Time limit exceeded
2 Halted 0 ms 0 KB -