/*input
6
1 1
2 2
3 1
4 1
5 1
6 1
*/
#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 int long long
#define double long double
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define RE(i,n) for (int i = 1; i <= n; i++)
#define RED(i,n) for (int i = n; i > 0; i--)
#define REPS(i,n) for(int i = 1; (i*i) <= n; i++)
#define REP(i,n) for (int i = 0; i < (int)n; i++)
#define FOR(i,a,b) for (int i = a; i < b; i++)
#define REPD(i,n) for (int i = n-1; i >= 0; i--)
#define FORD(i,a,b) for (int i = a; i >= b; i--)
#define all(v) v.begin(),v.end()
#define pii pair<int,int>
#define vi vector<int>
#define vvi vector<vi>
#define print(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout << *it << " "; cout << endl;
#define debug(x) cout << x << endl;
#define debug2(x,y) cout << x << " " << y << endl;
#define debug3(x,y,z) cout << x << " " << y << " " << z << endl;
typedef tree<
int,
null_type,
less<int>,
rb_tree_tag,
tree_order_statistics_node_update>
ordered_set;
const int INF = 1e18+1;
const int MOD = 1e9+7;
const double PI = 3.14159265358979323846264338;
int raise(int a,int n,int m = MOD){
if(n == 0)return 1;
if(n == 1)return a;
int x = 1;
x *= raise(a,n/2,m);
x %= m;
x *= x;
x %= m;
if(n%2)x*= a;
x %= m;
return x;
}
int floor1(int n,int k){
if(n%k == 0 || n >= 0)return n/k;
return (n/k)-1;
}
int ceil1(int n,int k){
return floor1(n+k-1,k);
}
const int N = 1e5+1;
int lazy[4*N];
int mn[4*N];
int mx[4*N];
pair<int,int> vals[N];
int n;
#define child 2*node
#define mid (l+r)/2
inline void pushdown(int node,int l,int r){
mn[node] += lazy[node];
mx[node] += lazy[node];
if(l != r){
lazy[child] += lazy[node];
lazy[child+1] += lazy[node];
}
lazy[node] = 0;
}
int bslow(int node,int l,int r,int val){
// returns index of smallest x such that lazy[x] == val
if(l == r)return l;
pushdown(node,l,r);pushdown(child,l,mid);pushdown(child+1,mid+1,r);
if(mn[child] <= val)return bslow(child,l,mid,val);
return bslow(child+1,mid+1,r,val);
}
int bshi(int node,int l,int r,int val){
if(l == r)return l;
pushdown(node,l,r);pushdown(child,l,mid);pushdown(child+1,mid+1,r);
if(mx[child+1] >= val)return bshi(child+1,mid+1,r,val);
return bshi(child,l,mid,val);
}
int getvalue(int node,int l,int r,int ind){
pushdown(node,l,r);
if(l == r)return mn[node];
if(ind <= mid)return getvalue(child,l,mid,ind);
return getvalue(child+1,mid+1,r,ind);
}
void updrange(int node,int l,int r,int start,int end){
pushdown(node,l,r);
if(end < l or start > r)return;
if(start <= l and r <= end){
lazy[node]++;
pushdown(node,l,r);
return;
}
updrange(child,l,mid,start,end);updrange(child+1,mid+1,r,start,end);
mn[node] = min(mn[child+1],mn[child]);
mx[node] = max(mx[child+1],mx[child]);
}
void solve(){
cin >> n;
int N1 = n;
n = 0;
REP(i,N1){
cin >> vals[i].f >> vals[i].s;
n = max(n,vals[i].f);
}
sort(vals,vals+N1);
REP(i,N1){
//if(i)break;
//cout << "PRINTING FOR : " << " " << vals[i].f << " " << vals[i].s << endl;
int k = vals[i].s;
int actualindex = vals[i].f-k+1;
//cout << "SHOULD START FROM : " << actualindex << endl;
int value_of_ind = getvalue(1,1,n,actualindex);
//cout << "BUT THIS WILL FUCK UP THE " << value_of_ind << " 's" << endl;
int startfrom = bslow(1,1,n,value_of_ind);
int endsat = bshi(1,1,n,value_of_ind);
int canplace = vals[i].f-endsat;
canplace = max(0LL,canplace);
int left = k-canplace;
if(canplace){
// cout << "SO Updating " << endsat+1 << " to " << vals[i].f << endl;
updrange(1,1,n,endsat+1,vals[i].f);
}
//cout << "NOW UPDATING THAT BLOCK FROM THE START : " << startfrom << " " << startfrom+left-1 << endl;
updrange(1,1,n,startfrom,startfrom+left-1);
}
int ans = 0;
RE(i,vals[N1-1].f){
int treapshit = getvalue(1,1,n,i);
//cout << i << " " << treapshit << endl;
ans += treapshit*(treapshit-1);
}
cout << ans/2;
}
signed main(){
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//freopen("rand.txt","r",stdin);//freopen(".out","w",stdout);
int t = 1;
//cin >> t;
while(t--){
solve();
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
420 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
376 KB |
Output is correct |
| 2 |
Correct |
3 ms |
504 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
760 KB |
Output is correct |
| 2 |
Correct |
24 ms |
6492 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
2040 KB |
Output is correct |
| 2 |
Correct |
41 ms |
1320 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
47 ms |
2396 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
97 ms |
4204 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
185 ms |
7732 KB |
Output is correct |
| 2 |
Correct |
151 ms |
8628 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
177 ms |
7952 KB |
Output is correct |
| 2 |
Correct |
101 ms |
8676 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
221 ms |
8056 KB |
Output is correct |
| 2 |
Correct |
125 ms |
4464 KB |
Output is correct |
