Submission #100265

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
100265	2019-03-10 07:13:51	ami	Lun (COCI19_lun)	C++14	50 / 50	3 ms	384 KiB

lun

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#include <bits/stdc++.h>
#define sz(c)      int(c.size())
#define rep(i,a,b) for (int i=a; i<(b); ++i)
#define per(i,a,b) for (int i=(b)-1; i>=(a); --i)
using namespace std;
using ll = long long;
bool valid(string s) {
  reverse(s.begin(),s.end());
  int sum=0;
  rep(i,1,sz(s)) {
    int c=s[i]-'0';
    if (i%2==1) {
      c*=2;
      sum+=c%10 + c/10;
    } else {
      sum+=c;
    }
  }
  return (sum*9)%10 == int(s[0]-'0');
}
int main() {
  cin.tie(0);
  ios_base::sync_with_stdio(0);
  cout<<fixed<<setprecision(10);
  int n;
  string s;
  cin>>n>>s;
 
 
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• Subtask 1: 50 / 50