Submission #1351452

#	Time	Username	Problem	Language	Result	Execution time	Memory
1351452		ezzzay	Secret Permutation (RMI19_permutation)	C++20	0 / 100	0 ms	420 KiB

permutation

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#include "permutation.h"
void fun(vector<int> ans, vector<int> vis, vector<int>d, vector<int>v, int idx){
	int n=v.size();
	if(n==idx+1){
		if(d[idx]== abs(ans.back()-ans[0])){
			answer(ans);
		}
		return;
	}
	int c1=d[idx]+ans[idx];
	int c2=ans[idx]-d[idx];
	if(c1<=n and vis[c1]==0){
		ans[idx+1]=c1;
		vis[c1]=1;
		fun(ans,vis,d,v,idx+1);
		ans[idx+1]=vis[c1]=0;
	}
	if(c2>=1 and vis[c2]==0){
		ans[idx+1]=c2;
		vis[c2]=1;
		fun(ans,vis,d,v,idx+1);
		ans[idx+1]=vis[c2]=0;
	}
}
void solve(int n){
	vector<int>v;
	for(int i=1;i<=n;i++)v.pb(i);
	vector<int>ans(n),d(n),vis(n+1);
	int s=0;
	for(int i=0;i<n;i++){
	    int g=v[0];
	    v.erase(v.begin());
	    v.pb(g);
		d[i]= query(v);
		s+=d[i];
	}
	s/=n-1;
	for(int i=0;i<n;i++)d[i]=s-d[i];
	
	for(int i=1;i<=n;i++){
		ans[0]=i;vis[i]=1;
		fun(ans,vis,d,v,0);
		ans[0]=vis[i]=0;
	}
}

Compilation message (stderr)

stub.cpp: In function 'int query(int*)':
stub.cpp:15:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   fscanf(stdin, "%d", &x);
      |   ~~~~~~^~~~~~~~~~~~~~~~~
stub.cpp: In function 'int main(int, char**)':
stub.cpp:48:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   fscanf(stdin, "%d", &N);
      |   ~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 35
• Subtask 3: 0 / 50