이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define F first
#define S second
const int N = 100003;
int st[4*N];
void Push(int v){
if(!st[v])return;
int rc=2*v+2;
int lc=rc-1;
st[lc]+=st[v];
st[rc]+=st[v];
st[v]=0;
}
int Get(int v, int l, int r, int ind){
if(l>r || l>ind || r<ind)return 0;
if(l==r)return st[v];
Push(v);
int mid=l+r>>1;
return Get(2*v+1, l, mid, ind)+Get(2*v+2, mid+1, r, ind);
}
void Update(int v, int l, int r, int L, int R){
if(l>r || l>R || r<L)return;
if(l>=L && r<=R){
st[v]++;
return;
}
Push(v);
int mid=l+r>>1;
Update(2*v+1, l, mid, L, R);
Update(2*v+2, mid+1, r, L, R);
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
pair<int, int> a[n];
for(int i=0; i< n; i++)cin >> a[i].F >> a[i].S;
sort(a, a+n);
for(int i=0; i< n; i++){
int ind=a[i].F-a[i].S;
int val=Get(0, 0, N-1, ind);
int l=0; int r=ind;
int mnind=0;
while(l<=r){
int s=l+r>>1;
int gt=Get(0, 0, N-1, s);
if(gt==val){
r=s-1;
mnind=s;
}
else l=s+1;
}
l=ind; r=a[i].F-1;
int mxind=0;
while(l<=r){
int s=l+r>>1;
int gt=Get(0, 0, N-1, s);
if(gt==val){
l=s+1;
mxind=s;
}
else r=s-1;
}
Update(0, 0, N-1, mxind+1, a[i].F-1);
Update(0, 0, N-1, mnind, mnind+a[i].S-a[i].F+mxind);
}
int ans=0;
for(int i=0; i< N; i++){
int gt=Get(0, 0, N-1, i);
ans+=gt*(gt-1);
}
cout << ans/2 << '\n';
}
컴파일 시 표준 에러 (stderr) 메시지
sails.cpp: In function 'long long int Get(long long int, long long int, long long int, long long int)':
sails.cpp:26:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
26 | int mid=l+r>>1;
| ~^~
sails.cpp: In function 'void Update(long long int, long long int, long long int, long long int, long long int)':
sails.cpp:36:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
36 | int mid=l+r>>1;
| ~^~
sails.cpp: In function 'int main()':
sails.cpp:56:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
56 | int s=l+r>>1;
| ~^~
sails.cpp:67:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
67 | int s=l+r>>1;
| ~^~
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