#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int mxN=3e5;
int n, p[mxN], p2[mxN], a[mxN], k=30;
ll x[mxN], y[mxN], r[mxN];
unordered_map<int, vector<int>> mp;
struct cmp1 {
__attribute__((always_inline)) bool operator()(const int &a, const int &b) {
return y[a]>>k<b;
}
};
void rs(int k) {
mp.clear();
for(int i=0; i<n; ++i)
if(a[p2[i]]==-1)
mp[x[p2[i]]>>k].push_back(p2[i]);
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n;
for(int i=0; i<n; ++i) {
cin >> x[i] >> y[i] >> r[i];
p[i]=p2[i]=i;
}
sort(p, p+n, [&](const int &a, const int &b) {
return r[a]==r[b]?a<b:r[a]>r[b];
});
sort(p2, p2+n, [&](const int &a, const int &b) {
return y[a]<y[b];
});
memset(a, -1, 4*n);
for(int i=-1; i+1<n; --i, --k) {
rs(k);
while(++i<n&&r[p[i]]>=1<<(k-1)) {
if(a[p[i]]!=-1)
continue;
for(ll b=(x[p[i]]>>k)-2; b<=(x[p[i]]>>k)+2; ++b) {
auto mf=mp.find(b);
if(mf==mp.end())
continue;
vector<int> &v=mf->second;
for(int j=lower_bound(v.begin(), v.end(), (y[p[i]]>>k)-2, cmp1())-v.begin(); j<v.size()&&y[v[j]]>>k<=(y[p[i]]>>k)+2; ++j) {
ll dx=x[p[i]]-x[v[j]], dy=y[p[i]]-y[v[j]], rs=r[p[i]]+r[v[j]];
if(dx*dx+dy*dy<=rs*rs&&a[v[j]]==-1)
a[v[j]]=p[i];
}
}
}
}
for(int i=0; i<n; ++i)
cout << a[i]+1 << " ";
}4
Compilation message
circle_selection.cpp: In function 'int main()':
circle_selection.cpp:50:83: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=lower_bound(v.begin(), v.end(), (y[p[i]]>>k)-2, cmp1())-v.begin(); j<v.size()&&y[v[j]]>>k<=(y[p[i]]>>k)+2; ++j) {
~^~~~~~~~~
circle_selection.cpp: At global scope:
circle_selection.cpp:60:2: error: expected unqualified-id before numeric constant
}4
^
