#include <bits/stdc++.h>
#define startt ios_base::sync_with_stdio(false);cin.tie(0);
typedef long long ll;
using namespace std;
#define vint vector<int>
#define all(v) v.begin(), v.end()
#define MOD 1000000007
#define MOD2 998244353
#define MX 1000000000
#define MXL 1000000000000000000
#define PI (ld)2*acos(0.0)
#define pb push_back
#define sc second
#define fr first
//#define int long long
#define endl '\n'
#define ld long double
#define NO cout << "NO" << endl
#define YES cout << "YES" << endl
int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r]-pref[l-1];}};//mesanu
template<typename T>
struct LazySegmentTree{
int n;
vector<T> t, lazy, a;
T neutral, lazy_neutral;
function<T(const T&, const T&)> merge;
function<T(const T&, const T&)> upd;
bool range_modif = false;
LazySegmentTree(int _n, T _neutral, T _lazy_neutral, const function<T(const T&, const T&)> &_merge, const function<T(const T&, const T&)> &_upd, bool _range_modif){
range_modif = _range_modif;
init(_n, _neutral, _lazy_neutral, _merge, _upd);
}
LazySegmentTree(vector<T> _a, T _neutral, T _lazy_neutral, const function<T(const T&, const T&)> &_merge, const function<T(const T&, const T&)> &_upd, bool _range_modif){
range_modif = _range_modif, a = _a;
int _n = (int)a.size();
init(_n, _neutral, _lazy_neutral, _merge, _upd);
build(1, 0, n - 1);
}
void init(int _n, T _neutral, T _lazy_neutral, const function<T(const T&, const T&)> &_merge, const function<T(const T&, const T&)> &_upd){
n = _n, neutral = _neutral, lazy_neutral = _lazy_neutral, merge = _merge, upd = _upd;
t.assign(4 * n, neutral);
lazy.assign(4 * n, lazy_neutral);
}
void build(int i, int l, int r){
if(l == r){
t[i] = a[l];
return;
}
int mid = (l + r) >> 1;
build(2 * i, l, mid);
build(2 * i + 1, mid + 1, r);
t[i] = merge(t[2 * i], t[2 * i + 1]);
}
void push(int i, int l, int r){
if(lazy[i].f == -2)return;
t[i] = upd(t[i], lazy[i]);
if(l != r){
lazy[2 * i] = upd(lazy[2 * i], lazy[i]);
lazy[2 * i + 1] = upd(lazy[2 * i + 1], lazy[i]);
}
lazy[i] = lazy_neutral;
}
void modif(int i, int l, int r, int tl, int tr, T val){
push(i, l, r);
if(l > tr || r < tl)return;
if(l >= tl && r <= tr){
lazy[i] = upd(lazy[i], val);
push(i, l, r);
return;
}
int mid = (l + r) >> 1;
modif(2 * i, l, mid, tl, tr, val);
modif(2 * i + 1, mid + 1, r, tl, tr, val);
t[i] = merge(t[2 * i], t[2 * i + 1]);
}
T query(int i, int l, int r, int tl, int tr){
push(i, l, r);
if(l > tr || r < tl)return neutral;
if(l >= tl && r <= tr)return t[i];
int mid = (l + r) >> 1;
T left = query(2 * i, l, mid, tl, tr);
T right = query(2 * i + 1, mid + 1, r, tl, tr);
return merge(left, right);
}
void modif(int l, int r, T val){
modif(1, 0, n - 1, l, r, val);
}
void modif(int poz, T val){
modif(1, 0, n - 1, poz, poz, val);
}
T query(int l, int r){
return query(1, 0, n - 1, l, r);
}
T query(int poz){
return query(1, 0, n - 1, poz, poz);
}
//n, neutral, lazy neutral, merge, upd, bool range update
};
struct node
{
int f, l;
};
node mg(node a, node b)
{
node temp;
if(a.f == -1){temp.f = b.f;}
else{temp.f = a.f;}
temp.l = max(a.l, b.l);
return temp;
}
node upd(node a, node b)
{
return b;
}
const int N = 100000;
void solve()
{
int n;
cin >> n;
vector<pair<int, int>> a(n);
node temp, temp2;
temp.f = -2;temp.l = -2;
temp2.f = -1; temp2.l = -1;
LazySegmentTree<node> st(N+5, temp2, temp, mg, upd, false);
for(int i = 0; i < n; i++)
{
cin >> a[i].fr >> a[i].sc;
}
vector<int> dif(N+5);
temp.f = -1; temp.l = -1;
st.modif(0, N, temp);
sort(all(a));
int range = 0;
for(int i = 0; i < n; i++)
{
range = a[i].fr-1;
int now_idx = range-a[i].sc+1;
if(now_idx == 0){
dif[range]++;
temp.f = range;temp.l = range;
st.modif(range, temp);
continue;
}
if(dif[now_idx-1] != 0)
{
dif[now_idx-1]--;
if(dif[now_idx-1] == 0)
{
temp.f = -1;temp.l = -1;
st.modif(now_idx-1, temp);
}
dif[range]++;
temp.f = range;temp.l = range;
st.modif(range, temp);
continue;
}
int now1 = st.query(0, now_idx-1).l;
int now2 = st.query(now_idx, range-1).f;
int already = a[i].sc;
if(now2 > -1)
{
dif[now2]--;
if(dif[now2] == 0)
{
temp.f = -1;temp.l = -1;
st.modif(now2, temp);
}
dif[range]++;
temp.f = range;temp.l = range;
st.modif(range, temp);
already-=range-now2;
}
if(now1 <= -1)
{
dif[already-1]++;
temp.f = already-1;temp.l = already-1;
st.modif(already-1, temp);
}
else
{
dif[now1]--;
if(dif[now1] == 0)
{
temp.f = -1;temp.l = -1;
st.modif(now1, temp);
}
dif[now1+already]++;
temp.f = now1+already;temp.l = now1+already;
st.modif(now1+already, temp);
}
}
long long ans = 0;
int now = 0;
for(int i = N; i >= 0; i--)
{
now+=dif[i];
ans+=now*(now-1)/2;
}
cout << ans << endl;
}
int32_t main(){
startt
int t = 1;
//cin >> t;
while (t--) {
solve();
}
}
/*
6
3 2
5 3
4 1
2 1
4 3
3 2
*/
Compilation message
sails.cpp: In member function 'void prefix_sum::build(std::vector<int>)':
sails.cpp:20:667: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r]-pref[l-1];}};//mesanu
| ~~^~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
6868 KB |
Output is correct |
| 2 |
Correct |
3 ms |
6868 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
6868 KB |
Output is correct |
| 2 |
Correct |
3 ms |
6868 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
6868 KB |
Output is correct |
| 2 |
Correct |
3 ms |
6868 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
6956 KB |
Output is correct |
| 2 |
Correct |
4 ms |
6868 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
6 ms |
6996 KB |
Output is correct |
| 2 |
Correct |
8 ms |
6996 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
19 ms |
7044 KB |
Output is correct |
| 2 |
Correct |
61 ms |
7204 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
59 ms |
7216 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
95 ms |
7252 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
159 ms |
7572 KB |
Output is correct |
| 2 |
Correct |
152 ms |
7508 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
167 ms |
7812 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
192 ms |
7772 KB |
Output is correct |
| 2 |
Correct |
145 ms |
7764 KB |
Output is correct |
