#include<bits/stdc++.h>
using namespace std;
namespace std {
// #include<Love>
using ll=long long;
using str=string;
using int128=__int128_t;
using ld=long double;
typedef unsigned int ui;
typedef unsigned long long ull;
#define Love<3 HerLoveForMeJustaDream
}
#define Lovesper_ ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pll pair<ll,ll>
#define mll map<ll,ll>
#define vll vector<ll>
#define pb push_back
#define all(c) c.begin(),c.end()
#define fi first
#define se second
#define debug cout<<"I Love You\n";
#define fu(i,a,b) for(ll i=a;i<=b;i++)
#define fd(i,a,b) for(int i=a;i>=b;i--)
#define fa(i,s) for(auto&i:s)
#define Bitc(x,i) (((x)>>(i))&1)
#define _log(_x) 63-__builtin_clzll(_x)
#define LoveTime chrono::steady_clock::now().time_since_epoch().count()
const pll dxy4[]={{-1,0},{0,-1},{0,1},{1,0}};
const pll dxy8[]={{-1,-1},{-1,0},{-1,1},{0,-1},{0,1},{1,-1},{1,0},{1,1}};
constexpr ll Mod=1e9+7;
constexpr ll mxn=1e6+7,mxm=3e3+7;
constexpr long long inf=(1ll<<31);
constexpr ll lnf=(1ll<<60);
struct __TS {
~__TS() {
// cerr<<"Time elapsed: "<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}
}__ts;
mt19937 rng(LoveTime);
#define setup ((1<<3)-1>>1)
void OpenLove(const str&name){
// I'm So Lonely. I am Trying To Get Out This Lonely With Her Love
Lovesper_
if(fopen((name+".inp").c_str(),"r")){
// freopen((name+".test").c_str(),"r",stdin);
freopen((name+".inp").c_str(),"r",stdin);
freopen((name+".out").c_str(),"w",stdout);
}
}
template<class X,class Y>bool maximize(X&x,const Y&y){X eps=1e-18;if(x+eps<y){x=y;return 1;}return 0;}
template<class X,class Y>bool minimize(X&x,const Y&y){X eps=1e-18;if(x>y+eps){x=y;return 1;}return 0;}
ostream&operator<<( std::ostream& dest, __int128_t value){
ostream::sentry s(dest);__uint128_t tmp=value<0?-value:value;
char buffer[128];char*d=end(buffer);
do{d--;*d="0123456789"[tmp%10];tmp/=10;}while(tmp);
if(value<0)d--,*d='-';ll len=end(buffer)-d;
if(dest.rdbuf()->sputn(d,len)!=len)dest.setstate(ios_base::badbit);
return dest;
}
struct custom_hash{
size_t operator()(uint64_t x)const{
static const uint64_t HashRand=LoveTime;
x^=HashRand;return x^(x>>16);
}};
int64_t add(ll&a,ll b){a+=b;if(a>=Mod)a%=Mod;while(a<0)a+=Mod;return a;}
int64_t mul(ll&a,ll b,ll mod){a=1ll*a*b%mod;return a;}
int64_t mpow(ll a,ll b,ll mod){ll ans=1;for(;b;b>>=1,a=mul(a,a,mod))if(b&1)ans=mul(ans,a,mod);return ans;}
ll n,k,f[mxn],g[mxn],fen[mxn];
pll p[mxn];
vll graph[mxn];
void Lovesper(const ll&TestCase){
cin>>n>>k;
fu(i,0,n-1)cin>>p[i].fi>>p[i].se;
ll half=n/2,sad=0;
fu(msk,1,(1<<half)){
ll sum=0,lst=0,gf=-1;
ll o=1;
fu(j,0,half-1){
if(!Bitc(msk,j))continue;
if(p[j].fi<lst){o=0;break;}
sum+=p[j].se;lst=p[j].fi;
gf=j;
}
if(o){
graph[gf].pb(sum);
if(sum>=k)sad+=1;
}
}
fu(msk,1,(1<<(n-half))-1){
ll sum=0,lst=0,gf=-1;
ll o=1;
fu(j,0,n-half){
if(!Bitc(msk,j))continue;
ll id=j+half;
if(p[id].fi<lst){o=0;break;}
sum+=p[id].se;lst=p[id].fi;
if(gf==-1)gf=id;
}
if(o){
graph[gf].pb(sum);
if(sum>=k)sad+=1;
}
}
fu(i,0,n-1)sort(all(graph[i]));
fu(l,0,half-1)
for(auto&j:graph[l])
fu(r,half,n-1){
if(p[l].fi>p[r].fi)continue;
sad+=(graph[r].end()-lower_bound(all(graph[r]),k-j));
}
cout<<sad;
}
signed main(int argc, char const *argv[]){
OpenLove("lovesper");
int tt=1;
// cin>>tt;
for(ll i=1;i<=tt;i++){
Lovesper(i);
if(i<tt)cout<<'\n';
}
return false;
}
Compilation message
san.cpp:14:13: warning: ISO C++11 requires whitespace after the macro name
14 | #define Love<3 HerLoveForMeJustaDream
| ^~~~
san.cpp: In function 'std::ostream& operator<<(std::ostream&, __int128)':
san.cpp:67:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
67 | if(value<0)d--,*d='-';ll len=end(buffer)-d;
| ^~
san.cpp:67:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
67 | if(value<0)d--,*d='-';ll len=end(buffer)-d;
| ^~
san.cpp: In function 'void OpenLove(const str&)':
san.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
56 | freopen((name+".inp").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
san.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
57 | freopen((name+".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
25168 KB |
Output is correct |
| 2 |
Correct |
4 ms |
25224 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
25168 KB |
Output is correct |
| 2 |
Correct |
5 ms |
25208 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
19 ms |
25952 KB |
Output is correct |
| 2 |
Correct |
6 ms |
25172 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
37 ms |
26472 KB |
Output is correct |
| 2 |
Correct |
22 ms |
25428 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
190 ms |
31420 KB |
Output is correct |
| 2 |
Correct |
101 ms |
26532 KB |
Output is correct |
