Submission #761116

#	Time	Username	Problem	Language	Result	Execution time	Memory
761116		NothingXD	Ideal city (IOI12_city)	C++17	0 / 100	5 ms	3156 KiB

city

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef complex<ld> point;

void debug_out(){cerr << endl;}

template<typename H, typename... T>
void debug_out(H h, T... t){
	cerr << h << ' ';
	debug_out(t...);
}

#define debug(...) cerr << "(" << #__VA_ARGS__ << "): ", debug_out(__VA_ARGS__)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define MP(x, y) make_pair(x, y)

const int maxn = 1e5 + 10;
const int inf = 2147483647;
const int mod = 1e9;

int add(int x, int y){
	int res = x + y;
	if (res >= mod) return res - mod;
	if (res < 0) return res + mod;
	return res;
}

int n, x[maxn], y[maxn], cnt[maxn], dis[maxn];
vector<int> val[maxn];

int DistanceSum(int N, int *X, int *Y) {

	n = N;
	int mnx = inf, mny = inf, mx = 0;
	for (int i = 1; i <= n; i++){
		x[i] = X[i-1];
		y[i] = Y[i-1];
		mnx = min(mnx, x[i]);
		mny = min(mny, y[i]);
		mx = max(mx, x[i]);
	}
	mnx--;
	mny--;
	for (int i = 1; i <= n; i++){
		x[i] -= mnx;
		y[i] -= mny;
		val[x[i]].push_back(y[i]);
	}
	int ans = 0;
	for (int i = 1; i <= mx-mnx; i++){
		sort(all(val[i]));
		int l = val[i][0], r = val[i].back();
		if (i > 1){
			for (auto x: val[i-1]){
				if (l <= x && x <= r){
					dis[x] = add(dis[x], cnt[x]);
				}
			}
			for (auto x: val[i-1]){
				if (x < l){
					cnt[l] += cnt[x];
					dis[l] = add(dis[l], 1ll * cnt[x] * (l - x + 1) % mod);
					cnt[x] = 0;
					dis[x] = 0;
				}
				else if (x > r){
					cnt[r] += cnt[x];
					dis[r] = add(dis[r], 1ll * cnt[x] * (x - r + 1) % mod);
					cnt[x] = 0;
					dis[x] = 0;
				}
			}
		}
		int sumcnt = 0, sumdis = 0;
		for (auto x: val[i]){
			sumdis = add(sumdis, add(dis[x], sumcnt));
			ans = add(ans, sumdis);
			sumcnt = add(sumcnt, cnt[x]);
		}
		reverse(all(val[i]));
		sumcnt = sumdis = 0;
		for (auto x: val[i]){
			sumdis = add(sumdis, sumcnt);
			ans = add(ans, sumdis);
			sumdis = add(sumdis, dis[x]);
			sumcnt = add(sumcnt, cnt[x]);
		}
		reverse(all(val[i]));
		for (auto x: val[i]){
			cnt[x]++;
		}
		int tmp = val[i].size();
		ans = add(ans, 1ll * tmp * (tmp-1) / 2 % mod);
	}
	return ans;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45