AtCoder Regular Contest 082

Submission #1592041

Source codeソースコード

#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;

const int MAX_N = 100005;
int p[MAX_N];

int main() {
  int N;
  scanf("%d", &N);
  for (int i = 1; i <= N; ++i)
    scanf("%d", &p[i]);
  int res = 0;
  for (int i = 1; i <= N; ++i)
    if (p[i] == i) {
      int j = i;
      while (p[j] == j && j <= N) j++;
      res += (j - i + 1) / 2;
      i = j - 1;
    }
  printf("%d\n", res);
  return 0;
}

Submission

Task問題 D - Derangement
User nameユーザ名 kiiiiii
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 400
Source lengthソースコード長 454 Byte
File nameファイル名
Exec time実行時間 10 ms
Memory usageメモリ使用量 512 KB

Compiler messageコンパイルメッセージ

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &N);
^
./Main.cpp:13:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &p[i]);
^

Test case

Set

Set name Score得点 / Max score Cases
Sample - 0_000.txt,0_001.txt,0_002.txt,0_003.txt
All 400 / 400 0_000.txt,0_001.txt,0_002.txt,0_003.txt,1_004.txt,1_005.txt,1_006.txt,1_007.txt,1_008.txt,1_009.txt,1_010.txt,1_011.txt,1_012.txt,1_013.txt,1_014.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
0_000.txt AC
0_001.txt AC
0_002.txt AC
0_003.txt AC 1 ms 128 KB
1_004.txt AC
1_005.txt AC 10 ms 512 KB
1_006.txt AC 10 ms 512 KB
1_007.txt AC 10 ms 512 KB
1_008.txt AC 10 ms 512 KB
1_009.txt AC 10 ms 512 KB
1_010.txt AC 10 ms 512 KB
1_011.txt AC 10 ms 512 KB
1_012.txt AC 10 ms 512 KB
1_013.txt AC 10 ms 512 KB
1_014.txt AC 10 ms 512 KB