#pragma GCC optimize("Ofast")
#pragma comment(linker,"/stack:200000000")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(v) v.begin(), v.end()
#define sh cin.tie(0); cin.sync_with_stdio(0); cout.tie(0);
#define FILE freopen("test.in", "r", stdin);
#define vprint(v) for (int ii = 0; ii < v.size(); ii++){cout << v[ii] << " ";}
#define debugv(v) if (v.size() != 0) {cout << "[ "; for (int __ = 0; __ < (int)(v.size()) - 1; __++){cout << v[__] << ", ";} cout << v[(int)(v.size()) - 1] << " ]" << endl;} else {cout << "[]" << endl;}
#define debug cout << "-----------------------------------------------" << endl;
#define print1(a) cout << "{ " << a << " }" << endl;
#define print2(a, b) cout << "{ " << a << ", " << b << " }" << endl;
#define print3(a, b, c) cout << "{ " << a << ", " << b << ", " << c << " }" << endl;
#define print4(a, b, c, d) cout << "{ " << a << ", " << b << ", " << c << ", " << d << " }" << endl;
using namespace std;
#define int long long
const int INF = 1e9 + 228;
const int MAXN = 40;
map<int, int> dp[MAXN];
int n, k;
void slow() {
vector<pair<int, int>> v;
for (int i = 0; i < n; i++) {
int aa, bb;
cin >> aa >> bb;
v.pb({aa, bb});
}
int ans = 0;
for (int i = 0; i < n; i++) {
dp[i][min(v[i].S, k)]++;
for (int j = 0; j < i; j++) {
if (v[i].F < v[j].F)
continue;
//print2(i, j);
for (auto to : dp[j]) {
dp[i][min(to.F + v[i].S, k)] += to.S;
}
}
}
for (int i = 0; i < n; i++) {
for (auto to : dp[i]) {
if (to.F >= k) {
ans += to.S;
}
}
}
cout << ans << endl;
}
signed main()
{
#ifdef LOCAL
FILE;
#endif
sh;
cin >> n >> k;
if (n <= 1) {
slow();
return 0;
}
int beg = n / 2;
int rs = n - beg;
vector<pair<int, int>> v;
for (int i = 0; i < n; i++) {
int aa, bb;
cin >> aa >> bb;
v.pb({aa, bb});
}
//int ans = 0;
for (int i = 0; i < beg; i++) {
dp[i][v[i].S]++;
for (int j = 0; j < i; j++) {
if (v[i].F < v[j].F)
continue;
//print2(i, j);
for (auto to : dp[j]) {
dp[i][to.F + v[i].S] += to.S;
}
}
}
for (int i = n - 1; i >= beg; i--) {
dp[i][v[i].S]++;
for (int j = n - 1; j > i; j--) {
if (v[i].F > v[j].F)
continue;
//print2(i, j);
for (auto to : dp[j]) {
dp[i][to.F + v[i].S] += to.S;
}
}
}
int ans = 0;
for (int i = 0; i < beg; i++) {
for (int j = beg; j < n; j++) {
if (v[i].F > v[j].F) {
continue;
}
vector<pair<int, int>> a, b;
for (auto to : dp[i]) {
a.pb({to.F, to.S});
}
for (auto to : dp[j]) {
b.pb({to.F, to.S});
}
sort(all(a));
sort(all(b));
vector<int> p;
p.pb(0);
int u = b.size();
for (int i = u - 1; i >= 0; i--) {
p.pb(p.back() + b[i].S);
}
p.pb(p.back());
reverse(all(p));
/*for (auto to : b) {
cout << to.F << ' ';
}
cout << endl;*/
for (auto to : a) {
int need = max(0LL, k - to.F);
int idx = lower_bound(all(b), mp(need, -INF)) - b.begin();
//print4(i, to.F, j, idx);
ans += (to.S * p[idx + 1]);
}
}
}
for (int i = 0; i < beg; i++) {
for (auto to : dp[i]) {
if (to.F >= k) {
ans += to.S;
}
}
}
for (int i = beg; i < n; i++) {
for (auto to : dp[i]) {
if (to.F >= k) {
ans += to.S;
}
}
}
cout << ans << endl;
return 0;
}
Compilation message
san.cpp:2:0: warning: ignoring #pragma comment [-Wunknown-pragmas]
#pragma comment(linker,"/stack:200000000")
san.cpp: In function 'int main()':
san.cpp:68:6: warning: unused variable 'rs' [-Wunused-variable]
int rs = n - beg;
^~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
508 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
105 ms |
8108 KB |
Output is correct |
| 2 |
Correct |
7 ms |
760 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
264 ms |
14916 KB |
Output is correct |
| 2 |
Correct |
24 ms |
2192 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
1045 ms |
62668 KB |
Time limit exceeded |
| 2 |
Halted |
0 ms |
0 KB |
- |
