Submission #406321

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
406321	2021-05-17 11:25:43	abdzag	Toys (CEOI18_toy)	C++17	79 / 100	1371 ms	262148 KiB

toy

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#include<bits/stdc++.h>
#include<unordered_map>
#define rep(i,a,b) for(int i=int(a);i<int(b);i++)
#define rrep(i,a,b) for(int i=int(a);i>int(b);i--)
#define all(v) v.begin(),v.end()
#define trav(a,v) for(auto&a:v)
#define  sz(a) a.size()
typedef long double ld;
using namespace std;
const long long inf = 1e15;
typedef long long ll;
typedef unsigned long long ull;
int main() {
  cin.sync_with_stdio(false);
  vector<ll> primes;
  map<ll, bool> is_prime;
  primes.push_back(2);
  rep(i, 3, 1e5) {
    ll val = sqrt(i);
    val++;
    ll ind = upper_bound(all(primes), val) - primes.begin();
    bool done = true;
    rep(j, 0, ind) {
      if (i % primes[j] == 0) {
        done = false;
        break;
      }
    }
    if (done) {
      is_prime[i] = 1;
 
 
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• Subtask 1: 19 / 19
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 21