#include<bits/stdc++.h>
using namespace std;
#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
////
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("-O3")
// #pragma GCC optimize("no-stack-protector")
// #pragma GCC optimize("fast-math")
//////#define LOCAL
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cout << *x, 0);
sim > char dud(...);
struct debug {
#ifndef LOCAL
~debug() { cout << endl; }
eni(!=) cout << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
*this << "[";
for (auto it = d.b; it != d.e; ++it)
*this << ", " + 2 * (it == d.b) << *it;
ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define fi first
#define f first
#define se second
#define s second
#define vi_a vector<int>a;
#define p_b push_back
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ll long long
//#define ull unsigned long long
typedef unsigned long long ull;
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ld long double
#define pll pair<ll,ll>
#define pii pair<int,int>
#define m_p make_pair
#define fast_io cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
#define all(x) x.begin(),x.end()
#define getfiles ifstream cin("input.txt");ofstream cout("output.txt");
#define pw(x) (1ll << x)
#define sz(x) (ll)x.size()
#define endl "\n"
#define rall(x) x.rbegin(),x.rend()
#define len(a) (ll)a.size()
#define rep(x,l,r) for(ll x=l;x<r;x++)
using namespace __gnu_pbds;
ld eps = (ld)1 / 1e6;
const ld pi=3.14159265359;
ll inf = 1e18,mod1=1e9+7;
ll sqr(ll a) { return a * a; }
ll qb(ll a) { return a * a * a; }
ll gcd(ll a, ll b) { return !a ? b : gcd(b % a, a); }
void binary(ll val,int to) {for(int i=0;i<to;i++) cerr<<(pw(i) & val ? 1 : 0); cerr<<endl;}
ll binpow(ll a, ll b, ll mod) { return b ? (b % 2 ? (a * (sqr(binpow(a, b / 2, mod)) % mod)) % mod : sqr(binpow(a, b / 2, mod)) % mod) : 1; }
ll binmult(ll a, ll b, ll mod) { return b ? (b % 2 ? (2 * binmult(a, b / 2, mod) + a) % mod : (2 * binmult(a, b / 2, mod)) % mod) : 0; }
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
const ll R=1e4;
const ll tx[4]={1,0,-1,0};
const ll ty[4]={0,1,0,-1};
const char rev_to[4]={'E','W','N','S'};
const int N=40+1;
const int M=1e9+7;
//typedef tree<pii,null_type,less<pii>,rb_tree_tag,tree_order_statistics_node_update> st;
ll dp[N];
int n;
ll k;
ll h[N],c[N];
vector<int>g[N];
ll sum[N];
bool used[N];
vector<int>lol;
void dfs(int v){
dp[v]=1;
used[v]=1;
// sum[v]=c[v];
for(auto &z : g[v]){
if(!used[z]) dfs(z);
dp[v]+=dp[z];
}
lol.p_b(v);
}
ll rec(int v,ll how){
if(sum[v]+how<k) return 0;
if(how>=k){
return dp[v];
}
else{
ll ps=0;
for(auto &z : g[v]){
ps+=rec(z,how+c[z]);
}
return ps;
}
}
signed main()
{
fast_io;
// freopen("in.txt","r",stdin);
// freopen("out.txt","w",stdout);
cin>>n>>k;
for(int i=0;i<n;i++){
cin>>h[i]>>c[i];
}
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(h[j]>=h[i]) g[i].p_b(j);
// debug()<<imie(g[i]);
}
// debug()<<imie(g[i]);
}
for(int i=0;i<n;i++){
if(!used[i]){
dfs(i);
reverse(all(lol));
for(int k=0;k<sz(lol);k++){
for(int d=k+1;d<sz(lol);d++){
sum[lol[k]]+=c[lol[d]];
// sum[lol[k]]+=c[lol[k]];
}
}
lol.clear();
}
// cout<<"F"<<dp[i]<<' '<<sum[i]<<endl;
}
ll ans=0;
for(int i=0;i<n;i++){
ans+=rec(i,c[i]);
}
cout<<ans;
return 0;
}
/*
*/
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
0 ms |
384 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
384 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
384 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Correct |
327 ms |
504 KB |
Output is correct |
