Submission #97464

#	Time	Username	Problem	Language	Result	Execution time	Memory
97464		KLPP	NLO (COCI18_nlo)	C++14	110 / 110	1358 ms	492 KiB

nlo

#include<bits/stdc++.h>

using namespace std;
typedef long long int lld;
typedef pair<int,int> pii;
set<int> s;
set<int>::iterator it;
lld A;
lld point;
vector<pair<int,pii > > v;
lld calculate(){
	sort(v.begin(),v.end());
	s.clear();
	point=0;
	A=0;
	for(int i=0;i<v.size();i++){
		if(s.size()>0){
			it=s.end();
			it--;
			lld s=*it;
			A+=s*(v[i].first-point);
			//cout<<s<<" "<<v[i].first-point<<endl;
		}
		point=v[i].first;
		//cout<<ans<<endl;
		if(v[i].second.second){
			s.erase(v[i].second.first);
		}else s.insert(v[i].second.first);
	}return A;
}
lld absol(lld a){
	if(a>0)return a;
	return -a;
}
lld lo,hi;
lld f(lld a, lld b){
	if(a<b)return -1;
	lo=0;
	hi=1000000000;
	while(hi-lo>1){
		lld mid=(hi+lo)/2;
		if(mid*mid+b*b<=a*a){
			lo=mid;
		}else hi=mid;
	}return lo;
}

int main(){
	int n,m;
	cin>>n>>m;
	int k;
	cin>>k;
	int circles[k][3];
	for(int i=1;i<=k;i++){
		int x,y,r;
		cin>>x>>y>>r;
		x--;y--;
		circles[i-1][0]=x;
		circles[i-1][1]=y;
		circles[i-1][2]=r;
		//cout<<x<<" "<<y<<endl;
		
	}
	
	lld ans=0;
	lld diff,diff2;
	int x,y;
	for(int i=0;i<m;i++){
		for(int val=1;val<=k;val++){
			x=circles[val-1][0];
			y=circles[val-1][1];
			diff=absol(i-y);
			lld diff2=f(circles[val-1][2],diff);
			if(diff2!=-1){
				//cout<<r<<" "<<diff<<" "<<f(r,diff)<<endl;
				//cout<<j<<" "<<x-diff2<<" "<<x+diff2<<endl;
				v.push_back(pair<int,pii>(x-diff2,pii(val,0)));
				v.push_back(pair<int,pii>(x+1+diff2,pii(val,1)));
			}
		}
		ans+=k*n-calculate();
		v.clear();
		//SETS[i]->print();
	}cout<<ans<<endl;
	return 0;
}

Compilation message (stderr)

nlo.cpp: In function 'lld calculate()':
nlo.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();i++){
              ~^~~~~~~~~
nlo.cpp: In function 'int main()':
nlo.cpp:66:11: warning: unused variable 'diff2' [-Wunused-variable]
  lld diff,diff2;
           ^~~~~

• Subtask 1: 110 / 110