Submission #516361

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
516361	2022-01-21 08:22:06	amunduzbaev	JOIRIS (JOI16_joiris)	C++14	100 / 100	1 ms	340 KiB

joiris

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#include "bits/stdc++.h"
using namespace std;
#define ar array
const int mod = 2020;
signed main(){
  ios::sync_with_stdio(0); cin.tie(0);
  
  int n, k; cin>>n>>k;
  vector<int> a(n);
  for(int i=0;i<n;i++) cin>>a[i];
  vector<int> b(k);
  for(int i=0;i<n;i++){
    b[i%k] = (b[i%k] + a[i]) % k;
  }
  
  for(int i=1;i<n%k;i++){
    if(b[i] != b[i-1]) {
      cout<<-1<<"\n";
      return 0;
    }
  }
  
  for(int i=n%k+1;i<k;i++){
    if(b[i] != b[i-1]){
      cout<<-1<<"\n";
      return 0;
    }
 
 
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• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 55 / 55