Submission #4022739


Source Code Expand

#include <stdio.h>
#include <stdlib.h>
#include <vector>

using namespace std;

int main(int argc, char *argv[]) {
  // read inputs
  long N;
  vector<long> as;
  scanf("%ld", &N);
  for (int i = 0; i < N; i++) {
    long a;
    scanf("%ld", &a);
    as.push_back(a);
  }

  // solve
  long ans = 0;
  ans += as[N - 1];
  for (long i = N - 2; i >= 0; i--) {
    if (as[i] < as[i + 1] - 1) {
      ans = -1;
      break;
    } else if (as[i] > as[i + 1] - 1) {  // 0 will not be a corner case
      ans += as[i];
    }
  }
  if (as[0] > 0) {
    ans = -1;
  }
  printf("%ld\n", ans);

  return 0;
}

Submission Info

Submission Time
Task C - Sequence Growing Easy
User khir
Language C++14 (GCC 5.4.1)
Score 700
Code Size 633 Byte
Status AC
Exec Time 26 ms
Memory 2420 KB

Compile Error

./Main.cpp: In function ‘int main(int, char**)’:
./Main.cpp:11:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%ld", &N);
                   ^
./Main.cpp:14:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%ld", &a);
                     ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 700 / 700
Status
AC × 3
AC × 49
Set Name Test Cases
Sample s1.txt, s2.txt, s3.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, 45.txt, 46.txt, s1.txt, s2.txt, s3.txt
Case Name Status Exec Time Memory
01.txt AC 25 ms 2420 KB
02.txt AC 26 ms 2420 KB
03.txt AC 23 ms 2420 KB
04.txt AC 23 ms 2420 KB
05.txt AC 22 ms 2420 KB
06.txt AC 22 ms 2420 KB
07.txt AC 23 ms 2420 KB
08.txt AC 21 ms 2420 KB
09.txt AC 23 ms 2420 KB
10.txt AC 23 ms 2420 KB
11.txt AC 23 ms 2420 KB
12.txt AC 23 ms 2420 KB
13.txt AC 23 ms 2420 KB
14.txt AC 23 ms 2420 KB
15.txt AC 23 ms 2420 KB
16.txt AC 23 ms 2420 KB
17.txt AC 23 ms 2420 KB
18.txt AC 23 ms 2420 KB
19.txt AC 23 ms 2420 KB
20.txt AC 23 ms 2420 KB
21.txt AC 21 ms 2420 KB
22.txt AC 21 ms 2420 KB
23.txt AC 21 ms 2420 KB
24.txt AC 20 ms 2420 KB
25.txt AC 21 ms 2420 KB
26.txt AC 23 ms 2420 KB
27.txt AC 23 ms 2420 KB
28.txt AC 23 ms 2420 KB
29.txt AC 23 ms 2420 KB
30.txt AC 22 ms 2420 KB
31.txt AC 23 ms 2420 KB
32.txt AC 23 ms 2420 KB
33.txt AC 19 ms 2420 KB
34.txt AC 21 ms 2420 KB
35.txt AC 23 ms 2420 KB
36.txt AC 23 ms 2420 KB
37.txt AC 23 ms 2420 KB
38.txt AC 23 ms 2420 KB
39.txt AC 23 ms 2420 KB
40.txt AC 23 ms 2420 KB
41.txt AC 1 ms 256 KB
42.txt AC 1 ms 256 KB
43.txt AC 1 ms 256 KB
44.txt AC 1 ms 256 KB
45.txt AC 1 ms 256 KB
46.txt AC 1 ms 256 KB
s1.txt AC 1 ms 256 KB
s2.txt AC 1 ms 256 KB
s3.txt AC 1 ms 256 KB