Submission #761103

#	Time	Username	Problem	Language	Result	Execution time	Memory
761103		NothingXD	Ideal city (IOI12_city)	C++17	32 / 100	125 ms	1180 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 = 2e3 + 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], h[maxn][maxn];
bool mark[maxn][maxn];

int xc[4] = {1, -1, 0, 0};
int yc[4] = {0, 0, 1, -1};

void bfs(int sx, int sy){
	for (int i = 1; i <= n; i++) h[x[i]][y[i]] = -1;
	h[sx][sy] = 0;
	queue<pii> q;
	q.push({sx, sy});
	while(!q.empty()){
		int xv = q.front().F, yv = q.front().S;
		q.pop();
		for (int i = 0; i < 4; i++){
			int xu = xv + xc[i], yu = yv + yc[i];
			if (mark[xu][yu] && h[xu][yu] == -1){
				h[xu][yu] = h[xv][yv] + 1;
				q.push({xu, yu});
			}
		}
	}
}

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;
		mark[x[i]][y[i]] = true;
	}
	int ans = 0;
	for (int i = 1; i <= n; i++){
		bfs(x[i], y[i]);
		for (int j = i; j <= n; j++){
			ans = add(ans, h[x[j]][y[j]]);
		}
	}
	return ans;
}

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