Submission #879731

#	Time	Username	Problem	Language	Result	Execution time	Memory
879731		NeroZein	Ideal city (IOI12_city)	C++17	0 / 100	3 ms	604 KiB

city

#include "bits/stdc++.h"
using namespace std; 

const int md = (int) 1e9; 

int dx[] = {1, -1, 0, 0};
int dy[] = {0, 0, 1, -1}; 

int DistanceSum(int N, int *X, int *Y) {
  int ret = 0;
  int mxn = 0, mxm = 0;
  int mnn = INT_MAX, mnm = INT_MAX; 
  for (int i = 0; i < N; ++i) {
    mxn = max(mxn, X[i]);
    mxm = max(mxm, Y[i]); 
    mnn = min(mnn, X[i]);
    mnm = min(mnm, Y[i]); 
  }
  auto sum = [&](int r) {
    r %= md; 
    return (int) (((long long) r * (r + 1) / 2) % md);
  };
  auto mul = [&](int x, int y) {
    x %= md; 
    y %= md; 
    return (int) ((long long) x * y % md); 
  };
  auto add = [&](int& x, int y) {
    x %= md; y %= md; 
    x += y;
    if (x >= md) x -= md; 
  };
  int lenn = mxn - mnn + 1;
  int lenm = mxm - mnm + 1;
  for (int i = 0; i < N; ++i) {
    int x = X[i], y = Y[i];
    int sx = mul(sum(x - mnn), lenm);
    //add(sx, mul(sum(mxn - x), lenm)); 
    int sy = mul(sum(y - mnm), lenn);
    //add(sy, mul(sum(mxm - y), lenn)); 
    add(ret, sx);
    add(ret, sy); 
  }
  return ret;
}

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