Submission #92561

#	Time	Username	Problem	Language	Result	Execution time	Memory
92561		Shtef	NLO (COCI18_nlo)	C++14	110 / 110	616 ms	504 KiB

nlo

#include <iostream>
#include <map>
#include <vector>
#include <cmath>
#include <set>
#include <utility>
#include <algorithm>
 
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef pair <ll, ll> pll;
#define x first
#define y second
#define mp make_pair

struct query{
	ll x, y, r;
};
 
ll n, m, k;
query a[105];


int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
cin >> k;
for(int i = 0 ; i < k ; ++i){
	cin >> a[i].x >> a[i].y >> a[i].r;
}
ll sol = 0;
for(int i = 1 ; i <= m ; ++i){
	ll last = 1;
	vector <pll> v;
	for(int j = 0 ; j < k ; ++j){
		ll x = a[j].x, y = a[j].y, r = a[j].r, val = j + 1;
		if(i >= max(1LL, y - r) && i <= min(m, y + r)){
			ll koef = (r - i + y) * (r + i - y);
			ld t = sqrt(koef);
			koef = (ll)t;
			v.push_back(mp(max(1LL, x - koef), val));
			v.push_back(mp(min(n + 1, x + koef + 1), -val));
		}
	}
	set <ll, greater <ll> > s;
	sort(v.begin(), v.end());
	for(int j = 0 ; j < v.size() ; ){
		ll t = v[j].x;
		sol += (t - last) * (k - (!s.empty() ? *s.begin() : 0LL));
		while(j < v.size() && v[j].x == t){
			ll o = v[j].y;
			if(o < 0){
				s.erase(s.find(-o));
			}
			else{
				s.insert(o);
			}
			j++;
		}
		last = t;
	}
	sol += (n + 1 - last) * k;
}
cout << sol << endl;
 
return 0;
}

Compilation message (stderr)

nlo.cpp: In function 'int main()':
nlo.cpp:51:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int j = 0 ; j < v.size() ; ){
                  ~~^~~~~~~~~~
nlo.cpp:54:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(j < v.size() && v[j].x == t){
         ~~^~~~~~~~~~

• Subtask 1: 110 / 110