Submission #1042131

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042131		XJP12	Unscrambling a Messy Bug (IOI16_messy)	C++14	0 / 100	0 ms	348 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
using namespace std;
typedef vector<int> vi;
/*bool check_element(string x){

}
void compile_set(){

}
void add_element(string x){

}*/
vi restore_permutation(int n, int w, int r){
	add_element("10101010");
	add_element("10010010");
	add_element("01001001");
	compile_set();
	string s;
	vi ans(n);
	int a,b;
	if(!check_element("10101010")){
		s="10101010";
		for(int i=0; i<n; i+=2){
			for(int j=1; j<n; j+=2){
				string t=s;
				swap(t[i],t[j]);
				if(check_element(t)){
					a=i+1;
					b=j+1;
					break;
				}
			}
		}
	}else{
		if(!check_element("10010010")){
			s="10010010";
		}else{
			s="01001001";
		}
		for(int i=0; i<n; i+=3){
			for(int j=1; j<n; j+=3){
				string t=s;
				swap(t[i],t[j]);
				if(check_element(t)){
					a=i+1;
					b=j+1;
					break;
				}
			}
		}
	}
	for(int i=0; i<n; i++){
		ans[i]=i+1;
		if(ans[i]==a){
			ans[i]=b;
			continue;
		}
		if(ans[i]==b){
			ans[i]=a;
			continue;
		}
	}
	return ans;
}

Compilation message (stderr)

messy.cpp: In function 'vi restore_permutation(int, int, int)':
messy.cpp:59:3: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
   59 |   if(ans[i]==b){
      |   ^~
messy.cpp:60:10: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
   60 |    ans[i]=a;

• Subtask 1: 0 / 20
• Subtask 2: 0 / 18
• Subtask 3: 0 / 11
• Subtask 4: 0 / 21
• Subtask 5: 0 / 30