Submission #114354

#	Time	Username	Problem	Language	Result	Execution time	Memory
114354		sebinkim	Lock Puzzle (innopolis2018_final_A)	C++14	100 / 100	9 ms	640 KiB

A

#include <bits/stdc++.h>

using namespace std;

char A[2020], B[2020];
int D[2020], E[2020];
vector <int> V;
int n, m;

void shift(int p)
{
	reverse(A, A + n);
	reverse(A + p, A + n);
	V.push_back(p);
}

int main()
{
	int i, j;
	
	scanf("%d%d", &n, &m);
	scanf("%s%s", A, B);
	
	if(n & 1){
		D[0] = 0;
		for(i=1; i<n; i+=2){
			reverse(D, D + i);
			for(j=i; j>=1; j--) D[j] = D[j - 1];
			D[i + 1] = i; D[0] = i + 1;
		}
		
		for(i=0; i<n; i++){
			E[D[i]] = i;
		}
		
		for(i=0; i<n; i++){
			if(A[i] == B[E[0]]) break;
		}
		
		shift(n - i - 1);
		
		for(i=1; i<n; i+=2){
			for(j=0; j<n-i; j++){
				if(A[j] == B[E[i]]) break;
			}
			
			shift(n - j - 1); shift(n); shift(i);
			
			for(j=i+1; j<n; j++){
				if(A[j] == B[E[i + 1]]) break;
			}
			
			shift(n - j); shift(j - i - 1);
		}
	}
	else{
		for(i=0; i<n; i+=2){
			reverse(D, D + i);
			for(j=i; j>=1; j--) D[j] = D[j - 1];
			D[i + 1] = i; D[0] = i + 1;
		}
		
		for(i=0; i<n; i++){
			E[D[i]] = i;
		}
		
		for(i=0; i<n; i+=2){
			for(j=0; j<n-i; j++){
				if(A[j] == B[E[i]]) break;
			}
			
			shift(n - j - 1); shift(n); shift(i);
			
			for(j=i+1; j<n; j++){
				if(A[j] == B[E[i + 1]]) break;
			}
			
			shift(n - j); shift(j - i - 1);
		}
	}
	
	for(i=0; i<n; i++){
		if(A[i] != B[i]) break;
	}
	
	if(i < n){
		printf("-1\n");
	}
	else{
		printf("%d\n", V.size());
		for(int &t: V) printf("%d ", t);
		printf("\n");
	}
	
	return 0;
}

Compilation message (stderr)

A.cpp: In function 'int main()':
A.cpp:90:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
   printf("%d\n", V.size());
                  ~~~~~~~~^
A.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
A.cpp:22:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s%s", A, B);
  ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 21 / 21
• Subtask 3: 24 / 24
• Subtask 4: 12 / 12
• Subtask 5: 12 / 12
• Subtask 6: 11 / 11
• Subtask 7: 11 / 11