Submission #699810

#	Time	Username	Problem	Language	Result	Execution time	Memory
699810		cig32	Packing Biscuits (IOI20_biscuits)	C++17	9 / 100	1085 ms	340 KiB

biscuits

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

vector<long long> b;

bool check(long long x, long long y) {
  int k = b.size();
  __int128 prev = 0;
  __int128 prod = x;
  prod *= y;
  for(int i=k-1; i>=0; i--) {
    __int128 c = y / (1ll << i);
    c *= x;
    c -= prev / (1ll << i);
    c = min(c, (__int128) b[i]);
    prev += c * (1ll << i);
  }
  if(prev == prod) return 1;
  return 0;
}

long long count_tastiness(long long x, std::vector<long long> a) {
	b = a;
  long long answer = 0;
  for(long long y=0; y<=100000; y++) {
    answer += check(x, y);
  }
  return answer;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23