| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 516069 |
2022-01-20T10:58:35 Z |
blue |
Teams (CEOI11_tea) |
C++17 |
|
2500 ms |
115056 KB |
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using vi = vector<int>;
using pii = pair<int, int>;
using vvi = vector<vi>;
#define sz(x) int(x.size())
const int INF = 100'000'000;
const int Z = (1<<20);
vector<int> segtree;
void set(int i, int v)
{
i += Z;
segtree[i] = v;
for(i >>= 1; i >= 1; i >>= 1) segtree[i] = max(segtree[i<<1], segtree[(i<<1) | 1]);
}
vector<pii> segtree2;
void set2(int i, int v)
{
// cerr << "\n\n" << "set2 " << i << ' ' << v << '\n';
i += Z;
segtree2[i].first = v;
for(i >>= 1; i >= 1; i >>= 1) segtree2[i] = max(segtree2[i<<1], segtree2[(i<<1) | 1]);
// cerr << "root = " << segtree2[1]
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n;
cin >> n;
pii a[1+n];
for(int i = 1; i <= n; i++)
{
cin >> a[i].first;
a[i].second = i;
}
sort(a+1, a+n+1);
vi dp(1+n);
vi dpmx(1+n);
dp[0] = dpmx[0] = 0;
for (int i = 1; i <= n; i++)
{
if (i - a[i].first >= 0)
dp[i] = dpmx[i - a[i].first] + 1;
else
dp[i] = -INF;
dpmx[i] = max(dp[i], dpmx[i-1]);
// cerr << i << " : " << dp[i] << '\n';
}
int team_count = dp[n];
int lo = 1, hi = n;
while(lo != hi)
{
int mxs = (lo+hi)/2;
segtree = vector<int>(Z<<1, -INF);
int l = 0;
int r = -1;
vi new_dp(1+n, -INF);
new_dp[0] = 0;
// cerr << "n = " << n << '\n';
for(int i = 1; i <= n; i++)
{
int nl = max(0, i-mxs);
int nr = max(-1, i - a[i].first);
if(nl > nr) continue;
if(nr - nl < 15)
{
for(int g = nl; g <= nr; g++)
new_dp[i] = max(new_dp[i], new_dp[g]+1);
continue;
}
while(r < nr)
{
r++;
set(r, new_dp[r]);
}
while(l > nl)
{
l--;
set(l, new_dp[l]);
}
while(r > nr)
{
set(r, -INF);
r--;
}
while(l < nl)
{
set(l, -INF);
l++;
}
new_dp[i] = max(-INF, segtree[1]+1);
}
if(new_dp[n] == team_count)
hi = mxs;
else
lo = mxs+1;
}
// cerr << team_count << ' ' << lo << '\n';
int mxs = lo;
// cerr << "\n\n\n\n\n";
// cerr << lo << ' ' << hi << " : " << mxs << '\n';
segtree2 = vector<pii>(Z<<1, {-INF, -1});
for(int i = 0; i <= n; i++) segtree2[Z+i].second = i;
int l = 0;
int r = -1;
vi new_dp(1+n, -INF);
new_dp[0] = 0;
vi prv(1+n, -1);
// cerr << "n = " << n << '\n';
for(int i = 1; i <= n; i++)
{
int nl = max(0, i-mxs);
int nr = max(-1, i - a[i].first);
if(nr - nl < 20)
{
for(int i2 = nl; i2 <= nr; i2++)
{
if(new_dp[i2]+1 >= new_dp[i])
{
new_dp[i] = new_dp[i2] + 1;
prv[i] = i2;
}
}
continue;
}
// if(i-mxs > i - a[i]) con
// cerr << "i = " << i << " : " << "nl nr = " << nl << ' ' << nr << '\n';
if(nl > nr) continue;
// cerr << "journey " << l << ' ' << r << " -> " << nl << ' ' << nr << '\n';
while(r < nr)
{
r++;
set2(r, new_dp[r]);
}
while(l > nl)
{
l--;
set2(l, new_dp[l]);
}
while(r > nr)
{
set2(r, -INF);
r--;
}
while(l < nl)
{
set2(l, -INF);
l++;
}
// cerr << l << ' ' << r << '\n';
// cerr << "st = " << segtree2[1].first << ' ' << segtree2[1].second << '\n';
new_dp[i] = max(-INF, segtree2[1].first+1);
prv[i] = segtree2[1].second;
// cerr << i << " : " << new_dp[i] << ' ' << prv[i] << '\n';
}
vvi teams;
int I = n;
while(I != 0)
{
teams.push_back(vi(0));
// cerr << I << ' ' << prv[I] << '\n';
for(int q = I; q > prv[I]; q--)
teams.back().push_back(a[q].second);
I = prv[I];
}
cout << team_count << '\n';
for(int f = 0; f < team_count; f++)
{
cout << sz(teams[f]) << ' ';
for(int w: teams[f]) cout << w << ' ';
cout << '\n';
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
16708 KB |
Output is correct |
| 2 |
Correct |
25 ms |
33060 KB |
Output is correct |
| 3 |
Correct |
25 ms |
33096 KB |
Output is correct |
| 4 |
Correct |
20 ms |
33120 KB |
Output is correct |
| 5 |
Correct |
30 ms |
33172 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
35 ms |
33192 KB |
Output is correct |
| 2 |
Correct |
38 ms |
33048 KB |
Output is correct |
| 3 |
Correct |
26 ms |
33064 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
37 ms |
33140 KB |
Output is correct |
| 2 |
Correct |
25 ms |
33156 KB |
Output is correct |
| 3 |
Correct |
26 ms |
33084 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
38 ms |
33156 KB |
Output is correct |
| 2 |
Correct |
35 ms |
33316 KB |
Output is correct |
| 3 |
Correct |
55 ms |
33180 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
60 ms |
33220 KB |
Output is correct |
| 2 |
Correct |
41 ms |
33292 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
157 ms |
35344 KB |
Output is correct |
| 2 |
Correct |
227 ms |
34980 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
213 ms |
35496 KB |
Output is correct |
| 2 |
Correct |
140 ms |
34932 KB |
Output is correct |
| 3 |
Correct |
185 ms |
35540 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1886 ms |
54952 KB |
Output is correct |
| 2 |
Correct |
1564 ms |
55112 KB |
Output is correct |
| 3 |
Correct |
1648 ms |
56508 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2088 ms |
65756 KB |
Output is correct |
| 2 |
Correct |
2208 ms |
115056 KB |
Output is correct |
| 3 |
Correct |
2248 ms |
65100 KB |
Output is correct |
| 4 |
Correct |
2244 ms |
60432 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1161 ms |
69128 KB |
Output is correct |
| 2 |
Correct |
267 ms |
71088 KB |
Output is correct |
| 3 |
Execution timed out |
2578 ms |
59080 KB |
Time limit exceeded |
| 4 |
Halted |
0 ms |
0 KB |
- |
