CSES - Putka Open 2015 – 5/6 - Results
Submission details
Task:Käännöt
Sender:
Submission time:2015-11-08 21:59:54 +0200
Language:C++
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED15
#2ACCEPTED41
#3ACCEPTED44
Test results
testverdicttimegroup
#1ACCEPTED0.06 s1details
#2ACCEPTED0.06 s1details
#3ACCEPTED0.05 s1details
#4ACCEPTED0.04 s1details
#5ACCEPTED0.05 s1details
#6ACCEPTED0.05 s2details
#7ACCEPTED0.05 s2details
#8ACCEPTED0.06 s2details
#9ACCEPTED0.05 s2details
#10ACCEPTED0.05 s2details
#11ACCEPTED0.06 s3details
#12ACCEPTED0.06 s3details
#13ACCEPTED0.05 s3details
#14ACCEPTED0.06 s3details
#15ACCEPTED0.04 s3details

Code

#include <iostream>
using namespace std;
const long long M=1000000007;

long long secret[101010];
long long sdd[101010];
long long s11[101010];
long long s10[101010];
long long ssdd[101010];


string s;


int main(){
  ios_base::sync_with_stdio(0); cin.tie(0);
  
  
  for (int i=1; i<101010; ++i){
    s11[i]=s11[i-1]*10+1;
    s11[i]%=M;
  }
  s10[0]=1;
  for (int i=1; i<101010; ++i){
    s10[i]=s10[i-1]*10;
    s10[i]%=M;
  }
  
  cin >> s;
  long long N=s.size();
  
  sdd[1]=(s11[N-2]*10)%M;
  ssdd[1]=N-2;
  for (int i=2; i<(N+1)/2; ++i){
    sdd[i]=(sdd[i-1]+(s11[N-2*i]*s10[i])%M)%M;
    ssdd[i]=ssdd[i-1]+N-2*i;
  }
  
  
  long long srt=(N*(N-1)/2+N);
  for (int i=0; i<N; ++i){
    int di=min(i, (int)N-i-1);
    
    secret[i]=(s11[N]+sdd[di])%M;
    secret[i]+=(s10[N-i-1]*((srt-N-ssdd[di])%M))%M;
    secret[i]%=M;
  }
  
  long long ans=0;
  for (int i=0; i<N; ++i){
    ans+=(secret[i]*(s[i]-'0'))%M;
    ans%=M;
  }
  cout << ans << endl;
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
825864589849478186996872119675...

correct output
457966376

user output
457966376

Test 2

Group: 1

Verdict: ACCEPTED

input
191658935877461356157657491987...

correct output
176954270

user output
176954270

Test 3

Group: 1

Verdict: ACCEPTED

input
348988594526165698179722696175...

correct output
338693404

user output
338693404

Test 4

Group: 1

Verdict: ACCEPTED

input
959161872742625799336943933597...

correct output
585928712

user output
585928712

Test 5

Group: 1

Verdict: ACCEPTED

input
925429363246698689162197257943...

correct output
517617697

user output
517617697

Test 6

Group: 2

Verdict: ACCEPTED

input
972591294933975999938266397628...

correct output
667001154

user output
667001154

Test 7

Group: 2

Verdict: ACCEPTED

input
275688881195265674233697529772...

correct output
213272855

user output
213272855

Test 8

Group: 2

Verdict: ACCEPTED

input
654678934762543351831648468742...

correct output
465477034

user output
465477034

Test 9

Group: 2

Verdict: ACCEPTED

input
852895263384279396767531876338...

correct output
225052500

user output
225052500

Test 10

Group: 2

Verdict: ACCEPTED

input
257723665884149498894428498943...

correct output
169577498

user output
169577498

Test 11

Group: 3

Verdict: ACCEPTED

input
965391619923528543348143963721...

correct output
458795777

user output
458795777

Test 12

Group: 3

Verdict: ACCEPTED

input
934996116481518541954869782274...

correct output
38884659

user output
38884659

Test 13

Group: 3

Verdict: ACCEPTED

input
356521595763548549682719476371...

correct output
335143519

user output
335143519

Test 14

Group: 3

Verdict: ACCEPTED

input
691571977153731228387836644955...

correct output
504860195

user output
504860195

Test 15

Group: 3

Verdict: ACCEPTED

input
882254176987218851832315176774...

correct output
32749477

user output
32749477