#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const int MAXN = 2e5+10;
int n, m;
ll overall[MAXN];
ll arr[MAXN];
ll req_red[MAXN];
ll r_end[MAXN];
vector<pii> ranges[MAXN]; // right endpoint, index
ll max(ll a, ll b) {
if (a > b) return a;
return b;
}
ll num_req(ll target) {
for (int i = 0; i < n; i++) req_red[i] = max(0, arr[i]-target);
fill(r_end, r_end+n, 0);
priority_queue<pii> pq;
ll sub = 0;
ll num = 0;
for (pii i: ranges[0]) pq.push(i);
for (int i = 0; i < n; i++) {
if (sub < req_red[i]) {
pii r = pq.top();
pq.pop();
ll amt;
if (r.second > req_red[i]-sub) {
r.second -= (req_red[i]-sub);
amt = (req_red[i]-sub);
pq.push(r);
}
else amt = r.second;
r_end[r.first] += amt;
sub += amt;
i--;
num += amt;
continue;
}
for (pii v: ranges[i+1]) pq.push(v);
sub -= r_end[i];
}
return num;
}
ll solve() {
ll mn = -1;
ll mx = 0;
for (int i = 0; i < n; i++) mx = max(mx, arr[i]);
mx++;
// int b = -1;
// for (int i = mn+1; i < mx; i++) {
// int v = 2*i+num_req(i);
// if (b == -1 || v < b) b = v;
// }
// return b;
while (mx > mn+2) {
ll cur = (mn+mx)/2;
ll v1 = num_req(cur);
ll v2 = num_req(cur+1);
if (v1 >= v2+2) mn = cur;
else mx = cur+1;
}
return 2*(mn+1)+num_req(mn+1);
}
int main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
cin >> n >> m;
n--;
for (int i = 0; i < m; i++) {
int a, b, c; cin >> a >> b >> c;
a--; b--;
if (a > b) swap(a, b);
ranges[a].push_back(pii(b-1, c));
overall[a] += c;
overall[b] -= c;
}
for (int i = 0; i < n; i++) {
overall[i+1] += overall[i];
}
for (int i = 0; i < n; i++) {
arr[i] = (overall[i]+1)/2;
}
ll ans = solve();
for (int i = 0; i < n; i++) arr[i] = overall[i]/2;
ans = min(ans, solve()+1);
cout << ans << "\n";
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
2 ms |
4948 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
2 ms |
4948 KB |
Output is correct |
9 |
Correct |
2 ms |
4948 KB |
Output is correct |
10 |
Correct |
2 ms |
4948 KB |
Output is correct |
11 |
Correct |
2 ms |
4948 KB |
Output is correct |
12 |
Correct |
2 ms |
4948 KB |
Output is correct |
13 |
Correct |
2 ms |
4948 KB |
Output is correct |
14 |
Correct |
2 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
2 ms |
4948 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
2 ms |
4948 KB |
Output is correct |
9 |
Correct |
2 ms |
4948 KB |
Output is correct |
10 |
Correct |
2 ms |
4948 KB |
Output is correct |
11 |
Correct |
2 ms |
4948 KB |
Output is correct |
12 |
Correct |
2 ms |
4948 KB |
Output is correct |
13 |
Correct |
2 ms |
4948 KB |
Output is correct |
14 |
Correct |
2 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5008 KB |
Output is correct |
17 |
Correct |
3 ms |
4948 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
19 |
Correct |
3 ms |
4948 KB |
Output is correct |
20 |
Correct |
3 ms |
5064 KB |
Output is correct |
21 |
Correct |
3 ms |
4948 KB |
Output is correct |
22 |
Correct |
3 ms |
4956 KB |
Output is correct |
23 |
Correct |
3 ms |
5064 KB |
Output is correct |
24 |
Correct |
3 ms |
4948 KB |
Output is correct |
25 |
Correct |
3 ms |
4948 KB |
Output is correct |
26 |
Correct |
3 ms |
4948 KB |
Output is correct |
27 |
Correct |
4 ms |
4948 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
2 ms |
4948 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
2 ms |
4948 KB |
Output is correct |
9 |
Correct |
2 ms |
4948 KB |
Output is correct |
10 |
Correct |
2 ms |
4948 KB |
Output is correct |
11 |
Correct |
2 ms |
4948 KB |
Output is correct |
12 |
Correct |
2 ms |
4948 KB |
Output is correct |
13 |
Correct |
2 ms |
4948 KB |
Output is correct |
14 |
Correct |
2 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5008 KB |
Output is correct |
17 |
Correct |
3 ms |
4948 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
19 |
Correct |
3 ms |
4948 KB |
Output is correct |
20 |
Correct |
3 ms |
5064 KB |
Output is correct |
21 |
Correct |
3 ms |
4948 KB |
Output is correct |
22 |
Correct |
3 ms |
4956 KB |
Output is correct |
23 |
Correct |
3 ms |
5064 KB |
Output is correct |
24 |
Correct |
3 ms |
4948 KB |
Output is correct |
25 |
Correct |
3 ms |
4948 KB |
Output is correct |
26 |
Correct |
3 ms |
4948 KB |
Output is correct |
27 |
Correct |
4 ms |
4948 KB |
Output is correct |
28 |
Correct |
10 ms |
5204 KB |
Output is correct |
29 |
Correct |
10 ms |
5204 KB |
Output is correct |
30 |
Correct |
10 ms |
5252 KB |
Output is correct |
31 |
Correct |
10 ms |
5256 KB |
Output is correct |
32 |
Correct |
11 ms |
5232 KB |
Output is correct |
33 |
Correct |
10 ms |
5256 KB |
Output is correct |
34 |
Correct |
10 ms |
5204 KB |
Output is correct |
35 |
Correct |
10 ms |
5256 KB |
Output is correct |
36 |
Correct |
10 ms |
5204 KB |
Output is correct |
37 |
Correct |
9 ms |
5204 KB |
Output is correct |
38 |
Correct |
6 ms |
5304 KB |
Output is correct |
39 |
Correct |
6 ms |
5284 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
2 ms |
4948 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
2 ms |
4948 KB |
Output is correct |
9 |
Correct |
2 ms |
4948 KB |
Output is correct |
10 |
Correct |
2 ms |
4948 KB |
Output is correct |
11 |
Correct |
2 ms |
4948 KB |
Output is correct |
12 |
Correct |
2 ms |
4948 KB |
Output is correct |
13 |
Correct |
2 ms |
4948 KB |
Output is correct |
14 |
Correct |
2 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5008 KB |
Output is correct |
17 |
Correct |
3 ms |
4948 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
19 |
Correct |
3 ms |
4948 KB |
Output is correct |
20 |
Correct |
3 ms |
5064 KB |
Output is correct |
21 |
Correct |
3 ms |
4948 KB |
Output is correct |
22 |
Correct |
3 ms |
4956 KB |
Output is correct |
23 |
Correct |
3 ms |
5064 KB |
Output is correct |
24 |
Correct |
3 ms |
4948 KB |
Output is correct |
25 |
Correct |
3 ms |
4948 KB |
Output is correct |
26 |
Correct |
3 ms |
4948 KB |
Output is correct |
27 |
Correct |
4 ms |
4948 KB |
Output is correct |
28 |
Correct |
10 ms |
5204 KB |
Output is correct |
29 |
Correct |
10 ms |
5204 KB |
Output is correct |
30 |
Correct |
10 ms |
5252 KB |
Output is correct |
31 |
Correct |
10 ms |
5256 KB |
Output is correct |
32 |
Correct |
11 ms |
5232 KB |
Output is correct |
33 |
Correct |
10 ms |
5256 KB |
Output is correct |
34 |
Correct |
10 ms |
5204 KB |
Output is correct |
35 |
Correct |
10 ms |
5256 KB |
Output is correct |
36 |
Correct |
10 ms |
5204 KB |
Output is correct |
37 |
Correct |
9 ms |
5204 KB |
Output is correct |
38 |
Correct |
6 ms |
5304 KB |
Output is correct |
39 |
Correct |
6 ms |
5284 KB |
Output is correct |
40 |
Correct |
547 ms |
15060 KB |
Output is correct |
41 |
Correct |
552 ms |
15116 KB |
Output is correct |
42 |
Correct |
527 ms |
14892 KB |
Output is correct |
43 |
Correct |
526 ms |
14908 KB |
Output is correct |
44 |
Correct |
516 ms |
14976 KB |
Output is correct |
45 |
Correct |
489 ms |
14804 KB |
Output is correct |
46 |
Correct |
504 ms |
14756 KB |
Output is correct |
47 |
Correct |
515 ms |
14920 KB |
Output is correct |
48 |
Correct |
495 ms |
14736 KB |
Output is correct |
49 |
Correct |
373 ms |
11872 KB |
Output is correct |
50 |
Correct |
285 ms |
12872 KB |
Output is correct |
51 |
Correct |
380 ms |
12068 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
3 ms |
4948 KB |
Output is correct |
6 |
Correct |
2 ms |
4948 KB |
Output is correct |
7 |
Correct |
3 ms |
4948 KB |
Output is correct |
8 |
Correct |
2 ms |
4948 KB |
Output is correct |
9 |
Correct |
2 ms |
4948 KB |
Output is correct |
10 |
Correct |
2 ms |
4948 KB |
Output is correct |
11 |
Correct |
2 ms |
4948 KB |
Output is correct |
12 |
Correct |
2 ms |
4948 KB |
Output is correct |
13 |
Correct |
2 ms |
4948 KB |
Output is correct |
14 |
Correct |
2 ms |
4948 KB |
Output is correct |
15 |
Correct |
3 ms |
4948 KB |
Output is correct |
16 |
Correct |
3 ms |
5008 KB |
Output is correct |
17 |
Correct |
3 ms |
4948 KB |
Output is correct |
18 |
Correct |
3 ms |
4948 KB |
Output is correct |
19 |
Correct |
3 ms |
4948 KB |
Output is correct |
20 |
Correct |
3 ms |
5064 KB |
Output is correct |
21 |
Correct |
3 ms |
4948 KB |
Output is correct |
22 |
Correct |
3 ms |
4956 KB |
Output is correct |
23 |
Correct |
3 ms |
5064 KB |
Output is correct |
24 |
Correct |
3 ms |
4948 KB |
Output is correct |
25 |
Correct |
3 ms |
4948 KB |
Output is correct |
26 |
Correct |
3 ms |
4948 KB |
Output is correct |
27 |
Correct |
4 ms |
4948 KB |
Output is correct |
28 |
Correct |
10 ms |
5204 KB |
Output is correct |
29 |
Correct |
10 ms |
5204 KB |
Output is correct |
30 |
Correct |
10 ms |
5252 KB |
Output is correct |
31 |
Correct |
10 ms |
5256 KB |
Output is correct |
32 |
Correct |
11 ms |
5232 KB |
Output is correct |
33 |
Correct |
10 ms |
5256 KB |
Output is correct |
34 |
Correct |
10 ms |
5204 KB |
Output is correct |
35 |
Correct |
10 ms |
5256 KB |
Output is correct |
36 |
Correct |
10 ms |
5204 KB |
Output is correct |
37 |
Correct |
9 ms |
5204 KB |
Output is correct |
38 |
Correct |
6 ms |
5304 KB |
Output is correct |
39 |
Correct |
6 ms |
5284 KB |
Output is correct |
40 |
Correct |
547 ms |
15060 KB |
Output is correct |
41 |
Correct |
552 ms |
15116 KB |
Output is correct |
42 |
Correct |
527 ms |
14892 KB |
Output is correct |
43 |
Correct |
526 ms |
14908 KB |
Output is correct |
44 |
Correct |
516 ms |
14976 KB |
Output is correct |
45 |
Correct |
489 ms |
14804 KB |
Output is correct |
46 |
Correct |
504 ms |
14756 KB |
Output is correct |
47 |
Correct |
515 ms |
14920 KB |
Output is correct |
48 |
Correct |
495 ms |
14736 KB |
Output is correct |
49 |
Correct |
373 ms |
11872 KB |
Output is correct |
50 |
Correct |
285 ms |
12872 KB |
Output is correct |
51 |
Correct |
380 ms |
12068 KB |
Output is correct |
52 |
Correct |
2349 ms |
15392 KB |
Output is correct |
53 |
Correct |
2060 ms |
14936 KB |
Output is correct |
54 |
Correct |
2205 ms |
15112 KB |
Output is correct |
55 |
Correct |
2155 ms |
14956 KB |
Output is correct |
56 |
Correct |
1940 ms |
17080 KB |
Output is correct |
57 |
Correct |
2048 ms |
16856 KB |
Output is correct |
58 |
Correct |
2181 ms |
16988 KB |
Output is correct |
59 |
Correct |
1106 ms |
13596 KB |
Output is correct |