#include <bits/stdc++.h>
using namespace std;
const int Nmax = 2e5 + 5;
priority_queue<int> heap;
int start[Nmax], finish[Nmax], add[Nmax], dp[Nmax], s[Nmax];
vector<int> v[Nmax];
int n, m, i, A, B;
vector< pair<int,int> > edges;
int mod(int x)
{
if(x <= 0) return x+n;
if(x>n) return x-n;
return x;
}
bool check_center(int where, int L)
{
int i, need = 0, nr;
for(i=1; i<=n; ++i) v[i].clear();
for(auto e : edges)
{
int x, y;
x = mod(e.first - where + 1);
y = mod(e.second - where + 1);
if(x > y) swap(x, y);
v[x].push_back(y);
}
while(heap.size()) heap.pop();
for(i=1; i<=n; ++i) finish[i] = 0;
for(i=1; i<=n; ++i)
{
start[i] = v[i].size(); add[i] = 0;
for(auto it : v[i]) finish[it] ++;
}
dp[0] = L;
for(i=1; i<n; ++i)
{
for(auto it : v[i]) heap.push(it);
dp[i] = dp[i-1] + start[i] - finish[i] + add[i];
while(dp[i] > L && need <= L)
{
assert(heap.size());
dp[i] -= 2;
nr = heap.top();
heap.pop();
add[nr] += 2;
++need;
}
if(need > L) return 0;
}
return (need <= L);
}
bool check(int L)
{
int i;
for(i=1; i<=n; ++i)
return (check_center(A, L) || check_center(B, L));
}
int best_point(bool dir)
{
int i;
for(i=1; i<=n; ++i)
s[i] = 0;
for(auto e : edges)
if(dir == 0)
{
++s[e.first];
--s[e.second];
}
else
{
++s[e.second];
++s[1];
--s[e.first];
}
for(i=1; i<=n; ++i) s[i] += s[i-1];
int Max = 0;
for(i=1; i<=n; ++i) Max = max(Max, s[i]);
for(i=1; i<=n; ++i)
if(Max == s[i]) return mod(i+1);
}
int main()
{
// freopen("input", "r", stdin);
cin >> n >> m;
int i, x, y, C;
for(i=1; i<=m; ++i)
{
cin >> x >> y >> C;
if(x > y) swap(x, y);
edges.push_back({x, y});
}
A = best_point(0);
B = best_point(1);
int st = 0, dr = m, mid;
while(st <= dr)
{
mid = (st+dr) / 2;
if(check(mid)) dr = mid - 1;
else st = mid + 1;
}
cout << st << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5112 KB |
Output is correct |
2 |
Correct |
5 ms |
5112 KB |
Output is correct |
3 |
Correct |
5 ms |
5112 KB |
Output is correct |
4 |
Correct |
5 ms |
5112 KB |
Output is correct |
5 |
Correct |
5 ms |
5152 KB |
Output is correct |
6 |
Correct |
5 ms |
5216 KB |
Output is correct |
7 |
Correct |
5 ms |
5288 KB |
Output is correct |
8 |
Correct |
5 ms |
5328 KB |
Output is correct |
9 |
Correct |
5 ms |
5328 KB |
Output is correct |
10 |
Correct |
5 ms |
5328 KB |
Output is correct |
11 |
Correct |
5 ms |
5328 KB |
Output is correct |
12 |
Correct |
5 ms |
5328 KB |
Output is correct |
13 |
Correct |
5 ms |
5328 KB |
Output is correct |
14 |
Correct |
5 ms |
5328 KB |
Output is correct |
15 |
Correct |
6 ms |
5344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5112 KB |
Output is correct |
2 |
Correct |
5 ms |
5112 KB |
Output is correct |
3 |
Correct |
5 ms |
5112 KB |
Output is correct |
4 |
Correct |
5 ms |
5112 KB |
Output is correct |
5 |
Correct |
5 ms |
5152 KB |
Output is correct |
6 |
Correct |
5 ms |
5216 KB |
Output is correct |
7 |
Correct |
5 ms |
5288 KB |
Output is correct |
8 |
Correct |
5 ms |
5328 KB |
Output is correct |
9 |
Correct |
5 ms |
5328 KB |
Output is correct |
10 |
Correct |
5 ms |
5328 KB |
Output is correct |
11 |
Correct |
5 ms |
5328 KB |
Output is correct |
12 |
Correct |
5 ms |
5328 KB |
Output is correct |
13 |
Correct |
5 ms |
5328 KB |
Output is correct |
14 |
Correct |
5 ms |
5328 KB |
Output is correct |
15 |
Correct |
6 ms |
5344 KB |
Output is correct |
16 |
Correct |
6 ms |
5344 KB |
Output is correct |
17 |
Correct |
6 ms |
5344 KB |
Output is correct |
18 |
Correct |
5 ms |
5344 KB |
Output is correct |
19 |
Correct |
13 ms |
5344 KB |
Output is correct |
20 |
Correct |
5 ms |
5344 KB |
Output is correct |
21 |
Correct |
6 ms |
5344 KB |
Output is correct |
22 |
Correct |
5 ms |
5344 KB |
Output is correct |
23 |
Correct |
5 ms |
5344 KB |
Output is correct |
24 |
Correct |
5 ms |
5344 KB |
Output is correct |
25 |
Correct |
6 ms |
5344 KB |
Output is correct |
26 |
Correct |
6 ms |
5344 KB |
Output is correct |
27 |
Correct |
6 ms |
5344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5112 KB |
Output is correct |
2 |
Correct |
5 ms |
5112 KB |
Output is correct |
3 |
Correct |
5 ms |
5112 KB |
Output is correct |
4 |
Correct |
5 ms |
5112 KB |
Output is correct |
5 |
Correct |
5 ms |
5152 KB |
Output is correct |
6 |
Correct |
5 ms |
5216 KB |
Output is correct |
7 |
Correct |
5 ms |
5288 KB |
Output is correct |
8 |
Correct |
5 ms |
5328 KB |
Output is correct |
9 |
Correct |
5 ms |
5328 KB |
Output is correct |
10 |
Correct |
5 ms |
5328 KB |
Output is correct |
11 |
Correct |
5 ms |
5328 KB |
Output is correct |
12 |
Correct |
5 ms |
5328 KB |
Output is correct |
13 |
Correct |
5 ms |
5328 KB |
Output is correct |
14 |
Correct |
5 ms |
5328 KB |
Output is correct |
15 |
Correct |
6 ms |
5344 KB |
Output is correct |
16 |
Correct |
6 ms |
5344 KB |
Output is correct |
17 |
Correct |
6 ms |
5344 KB |
Output is correct |
18 |
Correct |
5 ms |
5344 KB |
Output is correct |
19 |
Correct |
13 ms |
5344 KB |
Output is correct |
20 |
Correct |
5 ms |
5344 KB |
Output is correct |
21 |
Correct |
6 ms |
5344 KB |
Output is correct |
22 |
Correct |
5 ms |
5344 KB |
Output is correct |
23 |
Correct |
5 ms |
5344 KB |
Output is correct |
24 |
Correct |
5 ms |
5344 KB |
Output is correct |
25 |
Correct |
6 ms |
5344 KB |
Output is correct |
26 |
Correct |
6 ms |
5344 KB |
Output is correct |
27 |
Correct |
6 ms |
5344 KB |
Output is correct |
28 |
Correct |
11 ms |
5344 KB |
Output is correct |
29 |
Correct |
14 ms |
5472 KB |
Output is correct |
30 |
Correct |
12 ms |
5472 KB |
Output is correct |
31 |
Correct |
13 ms |
5508 KB |
Output is correct |
32 |
Correct |
12 ms |
5592 KB |
Output is correct |
33 |
Correct |
15 ms |
5624 KB |
Output is correct |
34 |
Correct |
32 ms |
5708 KB |
Output is correct |
35 |
Correct |
12 ms |
5740 KB |
Output is correct |
36 |
Correct |
11 ms |
5772 KB |
Output is correct |
37 |
Correct |
10 ms |
5824 KB |
Output is correct |
38 |
Correct |
10 ms |
5876 KB |
Output is correct |
39 |
Correct |
10 ms |
5916 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5112 KB |
Output is correct |
2 |
Correct |
5 ms |
5112 KB |
Output is correct |
3 |
Correct |
5 ms |
5112 KB |
Output is correct |
4 |
Correct |
5 ms |
5112 KB |
Output is correct |
5 |
Correct |
5 ms |
5152 KB |
Output is correct |
6 |
Correct |
5 ms |
5216 KB |
Output is correct |
7 |
Correct |
5 ms |
5288 KB |
Output is correct |
8 |
Correct |
5 ms |
5328 KB |
Output is correct |
9 |
Correct |
5 ms |
5328 KB |
Output is correct |
10 |
Correct |
5 ms |
5328 KB |
Output is correct |
11 |
Correct |
5 ms |
5328 KB |
Output is correct |
12 |
Correct |
5 ms |
5328 KB |
Output is correct |
13 |
Correct |
5 ms |
5328 KB |
Output is correct |
14 |
Correct |
5 ms |
5328 KB |
Output is correct |
15 |
Correct |
6 ms |
5344 KB |
Output is correct |
16 |
Correct |
6 ms |
5344 KB |
Output is correct |
17 |
Correct |
6 ms |
5344 KB |
Output is correct |
18 |
Correct |
5 ms |
5344 KB |
Output is correct |
19 |
Correct |
13 ms |
5344 KB |
Output is correct |
20 |
Correct |
5 ms |
5344 KB |
Output is correct |
21 |
Correct |
6 ms |
5344 KB |
Output is correct |
22 |
Correct |
5 ms |
5344 KB |
Output is correct |
23 |
Correct |
5 ms |
5344 KB |
Output is correct |
24 |
Correct |
5 ms |
5344 KB |
Output is correct |
25 |
Correct |
6 ms |
5344 KB |
Output is correct |
26 |
Correct |
6 ms |
5344 KB |
Output is correct |
27 |
Correct |
6 ms |
5344 KB |
Output is correct |
28 |
Correct |
11 ms |
5344 KB |
Output is correct |
29 |
Correct |
14 ms |
5472 KB |
Output is correct |
30 |
Correct |
12 ms |
5472 KB |
Output is correct |
31 |
Correct |
13 ms |
5508 KB |
Output is correct |
32 |
Correct |
12 ms |
5592 KB |
Output is correct |
33 |
Correct |
15 ms |
5624 KB |
Output is correct |
34 |
Correct |
32 ms |
5708 KB |
Output is correct |
35 |
Correct |
12 ms |
5740 KB |
Output is correct |
36 |
Correct |
11 ms |
5772 KB |
Output is correct |
37 |
Correct |
10 ms |
5824 KB |
Output is correct |
38 |
Correct |
10 ms |
5876 KB |
Output is correct |
39 |
Correct |
10 ms |
5916 KB |
Output is correct |
40 |
Correct |
582 ms |
15276 KB |
Output is correct |
41 |
Correct |
509 ms |
16848 KB |
Output is correct |
42 |
Correct |
633 ms |
18356 KB |
Output is correct |
43 |
Correct |
677 ms |
19488 KB |
Output is correct |
44 |
Correct |
559 ms |
21016 KB |
Output is correct |
45 |
Correct |
589 ms |
22144 KB |
Output is correct |
46 |
Correct |
484 ms |
23488 KB |
Output is correct |
47 |
Correct |
517 ms |
24756 KB |
Output is correct |
48 |
Correct |
479 ms |
26292 KB |
Output is correct |
49 |
Correct |
342 ms |
26292 KB |
Output is correct |
50 |
Correct |
270 ms |
27628 KB |
Output is correct |
51 |
Correct |
323 ms |
28200 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
5112 KB |
Output is correct |
2 |
Correct |
5 ms |
5112 KB |
Output is correct |
3 |
Correct |
5 ms |
5112 KB |
Output is correct |
4 |
Correct |
5 ms |
5112 KB |
Output is correct |
5 |
Correct |
5 ms |
5152 KB |
Output is correct |
6 |
Correct |
5 ms |
5216 KB |
Output is correct |
7 |
Correct |
5 ms |
5288 KB |
Output is correct |
8 |
Correct |
5 ms |
5328 KB |
Output is correct |
9 |
Correct |
5 ms |
5328 KB |
Output is correct |
10 |
Correct |
5 ms |
5328 KB |
Output is correct |
11 |
Correct |
5 ms |
5328 KB |
Output is correct |
12 |
Correct |
5 ms |
5328 KB |
Output is correct |
13 |
Correct |
5 ms |
5328 KB |
Output is correct |
14 |
Correct |
5 ms |
5328 KB |
Output is correct |
15 |
Correct |
6 ms |
5344 KB |
Output is correct |
16 |
Correct |
6 ms |
5344 KB |
Output is correct |
17 |
Correct |
6 ms |
5344 KB |
Output is correct |
18 |
Correct |
5 ms |
5344 KB |
Output is correct |
19 |
Correct |
13 ms |
5344 KB |
Output is correct |
20 |
Correct |
5 ms |
5344 KB |
Output is correct |
21 |
Correct |
6 ms |
5344 KB |
Output is correct |
22 |
Correct |
5 ms |
5344 KB |
Output is correct |
23 |
Correct |
5 ms |
5344 KB |
Output is correct |
24 |
Correct |
5 ms |
5344 KB |
Output is correct |
25 |
Correct |
6 ms |
5344 KB |
Output is correct |
26 |
Correct |
6 ms |
5344 KB |
Output is correct |
27 |
Correct |
6 ms |
5344 KB |
Output is correct |
28 |
Correct |
11 ms |
5344 KB |
Output is correct |
29 |
Correct |
14 ms |
5472 KB |
Output is correct |
30 |
Correct |
12 ms |
5472 KB |
Output is correct |
31 |
Correct |
13 ms |
5508 KB |
Output is correct |
32 |
Correct |
12 ms |
5592 KB |
Output is correct |
33 |
Correct |
15 ms |
5624 KB |
Output is correct |
34 |
Correct |
32 ms |
5708 KB |
Output is correct |
35 |
Correct |
12 ms |
5740 KB |
Output is correct |
36 |
Correct |
11 ms |
5772 KB |
Output is correct |
37 |
Correct |
10 ms |
5824 KB |
Output is correct |
38 |
Correct |
10 ms |
5876 KB |
Output is correct |
39 |
Correct |
10 ms |
5916 KB |
Output is correct |
40 |
Correct |
582 ms |
15276 KB |
Output is correct |
41 |
Correct |
509 ms |
16848 KB |
Output is correct |
42 |
Correct |
633 ms |
18356 KB |
Output is correct |
43 |
Correct |
677 ms |
19488 KB |
Output is correct |
44 |
Correct |
559 ms |
21016 KB |
Output is correct |
45 |
Correct |
589 ms |
22144 KB |
Output is correct |
46 |
Correct |
484 ms |
23488 KB |
Output is correct |
47 |
Correct |
517 ms |
24756 KB |
Output is correct |
48 |
Correct |
479 ms |
26292 KB |
Output is correct |
49 |
Correct |
342 ms |
26292 KB |
Output is correct |
50 |
Correct |
270 ms |
27628 KB |
Output is correct |
51 |
Correct |
323 ms |
28200 KB |
Output is correct |
52 |
Incorrect |
671 ms |
32880 KB |
Output isn't correct |
53 |
Halted |
0 ms |
0 KB |
- |