Submission #647731

#	Time	Username	Problem	Language	Result	Execution time	Memory
647731		tvladm2009	Remittance (JOI19_remittance)	C++14	100 / 100	229 ms	28580 KiB

remittance

#include <iostream>

using namespace std;

int const nmax = 1000000;

int a[5 + nmax], b[5 + nmax];

int main() {
  std::ios_base::sync_with_stdio(0);
  std::cin.tie(0);

  int n;
  std::cin >> n;
  for(int i = 0;i < n; i++)
    std::cin >> a[i] >> b[i];

  bool all0 = true;
  for(int i = 0;i < n; i++) {
    if(a[i] > 0 || b[i] > 0)
      all0 = false;
  }
  if(all0 == true) {
    std::cout << "Yes\n";
    return 0;     
  }
  while(true) {
    bool complete = true;
    for(int i = 0;i < n; i++) {
      if(a[i] > b[i]) {
        int aux = (a[i] - b[i] + 1) / 2;
        a[i] -= aux * 2;
        a[(i + 1) % n] += aux;
        if(aux > 0)
          complete = false;
      }
    }
    if(complete == true)
      break;
  }

  bool ans = false;
  for(int i = 0;i < n; i++) {
    if(b[i] > 0)
      ans = true;
  }
  for(int i = 0;i < n; i++) {
    if(a[i] != b[i])
      ans = false;
  }
  if(ans == true)
    std::cout << "Yes\n";
  else
    std::cout << "No\n";
  return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45