#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define ff first
#define ss second
#define ll int64_t
#define ld long double
#define nl cout<<"\n"
#define i128 __int128_t
#define all(v) v.begin(),v.end()
#define mset(a,v) memset((a),(v),sizeof(a))
#define forn(i,a,b) for(int64_t i=int64_t(a);i<int64_t(b);++i)
#define forb(i,a,b) for(int64_t i=int64_t(a);i>=int64_t(b);--i)
#define fastio() ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define mod 1'000'000'007
#define mod2 998'244'353
#define inf 1'000'000'000'000'007
#define pi 3.14159265358979323846
template<class key,class cmp=std::less<key>>
using ordered_set=tree<key,null_type,cmp,rb_tree_tag,tree_order_statistics_node_update>;
template<class L,class R> ostream& operator<<(ostream& out,pair<L,R> &p) {return out<<"("<<p.ff<<", "<<p.ss<<")";}
template<class T> ostream& operator<<(ostream& out,vector<T> &v) {out<<"[";for(auto it=v.begin();it!=v.end();++it){if(it!=v.begin())out<<", ";out<<*it;}return out<<"]";}
template<class T> ostream& operator<<(ostream& out,deque<T> &v) {out<<"[";for(auto it=v.begin();it!=v.end();++it){if(it!=v.begin())out<<", ";out<<*it;}return out<<"]";}
template<class T> ostream& operator<<(ostream& out,set<T> &s) {out<<"{";for(auto it=s.begin();it!=s.end();++it){if(it!=s.begin())out<<", ";out<<*it;}return out<<"}";}
template<class T> ostream& operator<<(ostream& out,ordered_set<T> &s) {out<<"{";for(auto it=s.begin();it!=s.end();++it){if(it!=s.begin())out<<", ";out<<*it;}return out<<"}";}
template<class L,class R> ostream& operator<<(ostream& out,map<L,R> &m) {out<<"{";for(auto it=m.begin();it!=m.end();++it){if(it!=m.begin())out<<", ";out<<*it;}return out<<"}";}
void dbg_out() {cerr<<"]\n";}
template<typename Head,typename... Tail>
void dbg_out(Head H,Tail... T) {cerr<<H;if(sizeof...(Tail))cerr<<", ";dbg_out(T...);}
#ifdef LOCAL
#define dbg(...) cerr<<"["<<#__VA_ARGS__<<"] = [",dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif
//---------------------------------mars4---------------------------------
class SegtreeMin
{
ll N=0;
vector<ll> segtree;
vector<ll> lazy;
ll _build(vector<ll> &a,ll st,ll ed,ll i=1)
{
if(st==ed)
return segtree[i]=a[st];
ll mid=(st+ed)>>1;
return segtree[i]=min(_build(a,st,mid,i<<1),_build(a,mid+1,ed,i<<1|1));
}
void _push(ll st,ll ed,ll val,ll i)
{
if(st!=ed)
{
lazy[i<<1]+=val;
lazy[i<<1|1]+=val;
}
}
void _update(ll st,ll ed,ll l,ll r,ll val,ll i=1)
{
if(lazy[i])
{
segtree[i]+=lazy[i];
_push(st,ed,lazy[i],i);
lazy[i]=0;
}
if(st>ed or st>r or ed<l)
return;
if(st>=l and ed<=r)
{
segtree[i]+=val;
_push(st,ed,val,i);
return;
}
ll mid=(st+ed)>>1;
_update(st,mid,l,r,val,i<<1);
_update(mid+1,ed,l,r,val,i<<1|1);
segtree[i]=min(segtree[i<<1],segtree[i<<1|1]);
}
ll _query(ll st,ll ed,ll l,ll r,ll i=1)
{
if(lazy[i])
{
segtree[i]+=lazy[i];
_push(st,ed,lazy[i],i);
lazy[i]=0;
}
if(st>ed or st>r or ed<l)
return inf;
if(st>=l and ed<=r)
return segtree[i];
ll mid=(st+ed)>>1;
return min(_query(st,mid,l,r,i<<1),_query(mid+1,ed,l,r,i<<1|1));
}
ll _first_element_atmost_x(ll st,ll ed,ll l,ll r,ll val,ll i=1)
{
if(lazy[i])
{
segtree[i]+=lazy[i];
_push(st,ed,lazy[i],i);
lazy[i]=0;
}
if(st>ed or st>r or ed<l or segtree[i]>val)
return -1;
if(st==ed)
return st;
ll mid=(st+ed)>>1;
ll ind=_first_element_atmost_x(st,mid,l,r,val,i<<1);
if(ind==-1)
ind=_first_element_atmost_x(mid+1,ed,l,r,val,i<<1|1);
return ind;
}
public:
void init(ll n,ll val=0)
{
N=n;
segtree=vector<ll>(N<<2,val);
lazy=vector<ll>(N<<2);
}
void build(vector<ll> &a)
{
_build(a,0,N-1);
}
void update(ll l,ll h,ll val)
{
_update(0,N-1,l,h,val);
}
ll query(ll l,ll h)
{
return _query(0,N-1,l,h);
}
ll first_element_atmost_x(ll l,ll r,ll val)
{
return _first_element_atmost_x(0,N-1,l,r,val);
}
void clear()
{
segtree=vector<ll>(N<<2);
lazy=vector<ll>(N<<2);
}
};
int main()
{
fastio();
ll z,n,m,t,k,i,j,l,d,h,r;
cin>>n;
vector<pair<ll,ll>> a(n);
for(auto &[l,r]:a)
{
cin>>l>>r;
}
sort(all(a));
SegtreeMin s;
s.init(n);
for(auto [l,r]:a)
{
ll rind=l-1;
ll lind=rind-r+1;
ll val=s.query(lind,lind);
ll llind=s.first_element_atmost_x(0,rind,val);
ll mind=s.first_element_atmost_x(0,rind,val-1);
ll ex=mind-lind;
if(mind==-1)
{
ex=r;
}
if(ex)
{
s.update(llind,llind+ex-1,1);
}
if(mind!=-1 and mind<=rind)
{
s.update(mind,rind,1);
}
}
ll ans=0;
forn(i,0,n)
{
ll tot=s.query(i,i);
ans+=(tot*tot-tot)>>1;
}
cout<<ans<<"\n";
cerr<<"\nTime elapsed: "<<1000*clock()/CLOCKS_PER_SEC<<"ms\n";
return 0;
}
Compilation message
sails.cpp: In function 'int main()':
sails.cpp:164:5: warning: unused variable 'z' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:9: warning: unused variable 'm' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:11: warning: unused variable 't' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:13: warning: unused variable 'k' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:15: warning: unused variable 'i' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:17: warning: unused variable 'j' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:19: warning: unused variable 'l' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:21: warning: unused variable 'd' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:23: warning: unused variable 'h' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
sails.cpp:164:25: warning: unused variable 'r' [-Wunused-variable]
164 | ll z,n,m,t,k,i,j,l,d,h,r;
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
256 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
2 ms |
468 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
5 ms |
960 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
39 ms |
3000 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
94 ms |
4788 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
112 ms |
7056 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
156 ms |
8404 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
199 ms |
9296 KB |
Output is correct |
| 2 |
Correct |
136 ms |
9196 KB |
Output is correct |
