#include <iostream>
#include <set>
#include <cmath>
#include <queue>
#include <vector>
#include <cstdlib>
#include <ctime>
#include <cmath>
#include <algorithm>
#include <cassert>
#include <map>
#include <deque>
using namespace std;
const int MX = 2e5;
int64_t lis_length[MX];
int64_t lis_number[MX];
const int MOD = 1e9 + 7;
pair<int64_t,int64_t> lis (vector<int> v, int x) {
lis_length[0] = 1, lis_number[0] = 1;
for (int i = 1; i < v.size(); i++) {
lis_length[i] = 1, lis_number[i] = 1;
for (int j = 0; j < i; j++) {
if (v[j] < v[i]) {
if (lis_length[j] + 1 > lis_length[i]) {
lis_length[i] = lis_length[j] + 1;
lis_number[i] = lis_number[j];
} else if (lis_length[j] + 1 == lis_length[i]) {
lis_number[i] += lis_number[j];
lis_number[i] %= MOD;
}
}
}
}
int64_t mx = 0, cnt = 1;
for (int i = 0; i < v.size(); i++) {
if (v[i] == x or x == -1) {
if (lis_length[i] > mx) {
mx = lis_length[i];
cnt = lis_number[i];
} else if (lis_length[i] == mx) {
cnt += lis_number[i];
cnt %= MOD;
}
}
}
return make_pair(mx, cnt);
}
pair<int64_t,int64_t> split (vector<int> v, int x) {
vector<int> v1, v2;
for (int i: v) {
if (i > x) {
v2.push_back(i);
} else {
v1.push_back(i);
}
}
reverse(v1.begin(), v1.end());
auto p1 = lis(v1, x);
auto p2 = lis(v2, -1);
return make_pair(p1.first + p2.first, (p1.second * p2.second) % MOD);
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n;
cin >> n;
vector<int> v(n);
set<int> s;
s.insert(0);
for (int i = 0; i < n; i++) {
cin >> v[i];
s.insert(v[i]);
}
int64_t mx = 0, cnt = 0;
for (int i: s) {
auto p = split(v, i);
if (p.first > mx) {
mx = p.first, cnt = p.second;
} else if (p.first == mx) {
cnt += p.second, cnt %= MOD;
}
}
if (cnt % 2 == 0) cnt /= 2;
else cnt = (cnt + MOD - 1)/2 % MOD;
for (int i = 0; i < n - mx; i++) {
cnt *= 2; cnt %= MOD;
}
cout << mx << " " << cnt << '\n';
}
Compilation message
zoltan.cpp: In function 'std::pair<long int, long int> lis(std::vector<int>, int)':
zoltan.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | for (int i = 1; i < v.size(); i++) {
| ~~^~~~~~~~~~
zoltan.cpp:35:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
35 | for (int i = 0; i < v.size(); i++) {
| ~~^~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 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 |
0 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
844 ms |
488 KB |
Output is correct |
| 8 |
Correct |
842 ms |
432 KB |
Output is correct |
| 9 |
Incorrect |
874 ms |
528 KB |
Output isn't correct |
| 10 |
Correct |
808 ms |
532 KB |
Output is correct |
| 11 |
Execution timed out |
1068 ms |
11044 KB |
Time limit exceeded |
| 12 |
Execution timed out |
1074 ms |
9920 KB |
Time limit exceeded |
| 13 |
Execution timed out |
1067 ms |
9360 KB |
Time limit exceeded |
| 14 |
Execution timed out |
1086 ms |
9540 KB |
Time limit exceeded |
| 15 |
Execution timed out |
1082 ms |
11688 KB |
Time limit exceeded |
| 16 |
Execution timed out |
1084 ms |
13388 KB |
Time limit exceeded |
| 17 |
Execution timed out |
1081 ms |
12052 KB |
Time limit exceeded |
| 18 |
Execution timed out |
1075 ms |
12228 KB |
Time limit exceeded |
| 19 |
Execution timed out |
1089 ms |
12088 KB |
Time limit exceeded |
| 20 |
Execution timed out |
1088 ms |
12096 KB |
Time limit exceeded |
