Submission #204151

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
204151	2020-02-24T16:14:04 Z	Kalam	Crazy old lady (IZhO13_crazy)	C++11	100 / 100	13 ms	380 KB

crazy

// KALAM
# include<bits/stdc++.h>

using namespace std;

const int N = 1000 + 77;
int n , a[N];
bool M[N];
inline bool Check(int x) {
   memset(M , 0 , sizeof M);
   int cur = 1;
   M[a[cur ++]] = 1;
   for(int i = 1;i <= n;++ i) {
      if(i == x)
         continue ;
      if(! M[i]) {
         if(a[cur ++] != i)
            return 0;
         M[i] = 1;
      } else {
         if(M[a[cur]])
            return 0;
         M[a[cur ++]] = 1;
      }
   }
   return 1;
}
inline void Test() {
   scanf("%d" , & n);
   for(int i = 1;i <= n;++ i)
      scanf("%d" , a + i);
   vector < int > A;
   for(int i = 1;i <= n;++ i)
      if(Check(i))
         A.push_back(i);
   int sz = A.size();
   printf("%d\n" , (sz == 1 ? A[0] : 0));
}
int main() {
   int T;
   scanf("%d" ,& T);
   while(T --)
      Test();
   return 0;
}

Compilation message

crazy.cpp: In function 'int main()':
crazy.cpp:41:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d" ,& T);
    ~~~~~^~~~~~~~~~~
crazy.cpp: In function 'void Test()':
crazy.cpp:29:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d" , & n);
    ~~~~~^~~~~~~~~~~~
crazy.cpp:31:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d" , a + i);
       ~~~~~^~~~~~~~~~~~~~

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	256 KB	Output is correct
2	Correct	5 ms	256 KB	Output is correct
3	Correct	5 ms	256 KB	Output is correct
4	Correct	5 ms	380 KB	Output is correct
5	Correct	5 ms	256 KB	Output is correct
6	Correct	5 ms	376 KB	Output is correct
7	Correct	5 ms	256 KB	Output is correct
8	Correct	6 ms	376 KB	Output is correct
9	Correct	6 ms	376 KB	Output is correct
10	Correct	6 ms	376 KB	Output is correct
11	Correct	7 ms	376 KB	Output is correct
12	Correct	7 ms	376 KB	Output is correct
13	Correct	7 ms	376 KB	Output is correct
14	Correct	9 ms	376 KB	Output is correct
15	Correct	9 ms	376 KB	Output is correct
16	Correct	10 ms	376 KB	Output is correct
17	Correct	9 ms	376 KB	Output is correct
18	Correct	11 ms	376 KB	Output is correct
19	Correct	12 ms	376 KB	Output is correct
20	Correct	13 ms	376 KB	Output is correct