Submission #39032053

Source Code Expand

#include <bits/stdc++.h>
using namespace std;

int main() {
  int N;
  cin >> N;
  vector<int> A(N);
  for (int n = 0; n < N; ++n) cin >> A[n];
  int count[200001];
  for (int i = 0; i <= 200000; ++i) count[i] = 0;
  for (int n = 0; n < N; ++n) ++count[A[n]];
  int rest = N;
  int64_t ans = 0;
  for (int64_t i = 0; rest > 0; ++i) {
    --rest;
    --count[A[i]];
    ans += (i + 1) * (rest - count[A[i]]);
    if (rest == 0) break;
    --rest;
    --count[A[N-1-i]];
    ans += (i + 1) * (rest - count[A[N-1-i]]);
  }
  cout << ans << endl;
}

Submission Info

Submission Time
Task E - Make it Palindrome
User Steinberg
Language C++ (GCC 9.2.1)
Score 500
Code Size 569 Byte
Status AC
Exec Time 55 ms
Memory 4804 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 1
AC × 89
Set Name Test Cases
Sample sample_01.txt
All sample_01.txt, test_01.txt, test_02.txt, test_03.txt, test_04.txt, test_05.txt, test_06.txt, test_07.txt, test_08.txt, test_09.txt, test_10.txt, test_11.txt, test_12.txt, test_13.txt, test_14.txt, test_15.txt, test_16.txt, test_17.txt, test_18.txt, test_19.txt, test_20.txt, test_21.txt, test_22.txt, test_23.txt, test_24.txt, test_25.txt, test_26.txt, test_27.txt, test_28.txt, test_29.txt, test_30.txt, test_31.txt, test_32.txt, test_33.txt, test_34.txt, test_35.txt, test_36.txt, test_37.txt, test_38.txt, test_39.txt, test_40.txt, test_41.txt, test_42.txt, test_43.txt, test_44.txt, test_45.txt, test_46.txt, test_47.txt, test_48.txt, test_49.txt, test_50.txt, test_51.txt, test_52.txt, test_53.txt, test_54.txt, test_55.txt, test_56.txt, test_57.txt, test_58.txt, test_59.txt, test_60.txt, test_61.txt, test_62.txt, test_63.txt, test_64.txt, test_65.txt, test_66.txt, test_67.txt, test_68.txt, test_69.txt, test_70.txt, test_71.txt, test_72.txt, test_73.txt, test_74.txt, test_75.txt, test_76.txt, test_77.txt, test_78.txt, test_79.txt, test_80.txt, test_81.txt, test_82.txt, test_83.txt, test_84.txt, test_85.txt, test_86.txt, test_87.txt, test_88.txt
Case Name Status Exec Time Memory
sample_01.txt AC 6 ms 4084 KiB
test_01.txt AC 3 ms 4164 KiB
test_02.txt AC 2 ms 4168 KiB
test_03.txt AC 4 ms 4252 KiB
test_04.txt AC 4 ms 4308 KiB
test_05.txt AC 3 ms 4200 KiB
test_06.txt AC 3 ms 4088 KiB
test_07.txt AC 3 ms 4280 KiB
test_08.txt AC 3 ms 4280 KiB
test_09.txt AC 3 ms 4292 KiB
test_10.txt AC 3 ms 4112 KiB
test_11.txt AC 5 ms 4292 KiB
test_12.txt AC 3 ms 4116 KiB
test_13.txt AC 3 ms 4232 KiB
test_14.txt AC 2 ms 4132 KiB
test_15.txt AC 3 ms 4200 KiB
test_16.txt AC 3 ms 4252 KiB
test_17.txt AC 3 ms 4160 KiB
test_18.txt AC 3 ms 4244 KiB
test_19.txt AC 3 ms 4316 KiB
test_20.txt AC 3 ms 4280 KiB
test_21.txt AC 3 ms 4308 KiB
test_22.txt AC 4 ms 4200 KiB
test_23.txt AC 3 ms 4292 KiB
test_24.txt AC 3 ms 4280 KiB
test_25.txt AC 3 ms 4112 KiB
test_26.txt AC 4 ms 4228 KiB
test_27.txt AC 3 ms 4092 KiB
test_28.txt AC 4 ms 4228 KiB
test_29.txt AC 3 ms 4200 KiB
test_30.txt AC 4 ms 4144 KiB
test_31.txt AC 3 ms 4288 KiB
test_32.txt AC 2 ms 4292 KiB
test_33.txt AC 50 ms 4644 KiB
test_34.txt AC 36 ms 4348 KiB
test_35.txt AC 22 ms 4280 KiB
test_36.txt AC 8 ms 4192 KiB
test_37.txt AC 47 ms 4744 KiB
test_38.txt AC 8 ms 4140 KiB
test_39.txt AC 54 ms 4572 KiB
test_40.txt AC 41 ms 4372 KiB
test_41.txt AC 13 ms 4260 KiB
test_42.txt AC 47 ms 4744 KiB
test_43.txt AC 51 ms 4612 KiB
test_44.txt AC 51 ms 4796 KiB
test_45.txt AC 53 ms 4572 KiB
test_46.txt AC 51 ms 4572 KiB
test_47.txt AC 32 ms 4448 KiB
test_48.txt AC 44 ms 4564 KiB
test_49.txt AC 17 ms 4228 KiB
test_50.txt AC 14 ms 4288 KiB
test_51.txt AC 50 ms 4676 KiB
test_52.txt AC 51 ms 4568 KiB
test_53.txt AC 51 ms 4568 KiB
test_54.txt AC 52 ms 4796 KiB
test_55.txt AC 50 ms 4568 KiB
test_56.txt AC 51 ms 4656 KiB
test_57.txt AC 51 ms 4572 KiB
test_58.txt AC 50 ms 4568 KiB
test_59.txt AC 50 ms 4580 KiB
test_60.txt AC 50 ms 4736 KiB
test_61.txt AC 53 ms 4652 KiB
test_62.txt AC 47 ms 4644 KiB
test_63.txt AC 52 ms 4644 KiB
test_64.txt AC 52 ms 4800 KiB
test_65.txt AC 51 ms 4648 KiB
test_66.txt AC 50 ms 4656 KiB
test_67.txt AC 51 ms 4656 KiB
test_68.txt AC 50 ms 4756 KiB
test_69.txt AC 50 ms 4644 KiB
test_70.txt AC 50 ms 4572 KiB
test_71.txt AC 49 ms 4584 KiB
test_72.txt AC 51 ms 4644 KiB
test_73.txt AC 51 ms 4804 KiB
test_74.txt AC 50 ms 4712 KiB
test_75.txt AC 50 ms 4708 KiB
test_76.txt AC 51 ms 4708 KiB
test_77.txt AC 50 ms 4644 KiB
test_78.txt AC 52 ms 4640 KiB
test_79.txt AC 51 ms 4580 KiB
test_80.txt AC 50 ms 4640 KiB
test_81.txt AC 50 ms 4584 KiB
test_82.txt AC 49 ms 4744 KiB
test_83.txt AC 51 ms 4748 KiB
test_84.txt AC 49 ms 4800 KiB
test_85.txt AC 49 ms 4800 KiB
test_86.txt AC 52 ms 4640 KiB
test_87.txt AC 50 ms 4584 KiB
test_88.txt AC 55 ms 4632 KiB