Submission #463773

#	Time	Username	Problem	Language	Result	Execution time	Memory
463773		mosiashvililuka	Secret Permutation (RMI19_permutation)	C++17	10 / 100	2909 ms	200 KiB

permutation

#include<bits/stdc++.h>
//#include "permutationc.h"
using namespace std;
int a,b,c,d,e,i,j,ii,jj,zx,xc,p[1009],pi,ONE,LAST;
vector <int> v,vv,ans;
void solve(int N);
int query(std::vector<int> V);
void answer(std::vector<int> P);
void Fill(vector <int>& q){
	int FX[280];
	for(int h=0; h<=a+1; h++){
		FX[h]=0;
	}
	for(int h=0; h<q.size(); h++){
		FX[q[h]]=1;
	}
	for(int h=1; h<=a; h++){
		if(FX[h]==0){
			q.push_back(h);
		}
	}
}
void solve(int N){
	a=N;
	for(i=1; i<=a; i++){
		v.clear();pi=0;
		for(j=1; j<=a; j++){
			if(i==j) continue;
			pi++;p[pi]=j;
		}
		jj=1;
		for(j=2; j<=pi; j++){
			v.clear();
			v.push_back(p[j]);v.push_back(p[jj]);v.push_back(i);
			Fill(v);
			zx=query(v);
			v.clear();
			v.push_back(p[jj]);v.push_back(p[j]);v.push_back(i);
			Fill(v);
			xc=query(v);
			if(xc>zx){
				jj=j;
			}
		}
		e=0;
		for(j=1; j<=pi; j++){
			if(j==jj) continue;
			v.clear();
			v.push_back(p[j]);v.push_back(p[jj]);v.push_back(i);
			Fill(v);
			zx=query(v);
			v.clear();
			v.push_back(p[jj]);v.push_back(p[j]);v.push_back(i);
			Fill(v);
			xc=query(v);
			//cout<<zx<<" k "<<xc<<endl;
			if(zx-xc>e){
				e=zx-xc;
			}
		}
		if(e==a-2){
			ONE=i;
			LAST=p[jj];
			break;
		}
	}
	
	//cout<<"ONE: "<<ONE<<endl;
	//
	if(a==3){
		v.clear();v.push_back(ONE);Fill(v);
		zx=query(v);
		/*v.clear();v.push_back(ONE);AntiFill(v);
		xc=query(v);*/
		if(zx==2){
			vv.clear();vv.resize(3);vv[ONE-1]=1;vv[v[1]-1]=2;vv[v[2]-1]=3;
		}else{
			vv.clear();vv.resize(3);vv[ONE-1]=1;vv[v[2]-1]=2;vv[v[1]-1]=3;
		}
		answer(vv);
		return;
	}
/*	for(i=1; i<=a; i++){
		if(i==ONE) continue;
		v.clear();pi=0;
		for(j=1; j<=a; j++){
			if(i==j) continue;
			if(j==ONE) continue;
			pi++;p[pi]=j;
		}
		jj=1;
		for(j=2; j<=pi; j++){
			v.clear();
			v.push_back(p[j]);v.push_back(p[jj]);v.push_back(i);
			Fill(v);
			zx=query(v);
			v.clear();
			v.push_back(p[jj]);v.push_back(p[j]);v.push_back(i);
			Fill(v);
			xc=query(v);
			if(xc>zx){
				jj=j;
			}
		}
		e=0;
		for(j=1; j<=pi; j++){
			if(j==jj) continue;
			v.clear();
			v.push_back(p[j]);v.push_back(p[jj]);v.push_back(i);
			Fill(v);
			zx=query(v);
			v.clear();
			v.push_back(p[jj]);v.push_back(p[j]);v.push_back(i);
			Fill(v);
			xc=query(v);
			if(zx-xc>e){
				e=zx-xc;
			}
		}
		if(e==a-3){
			LAST=i;
			break;
		}
	}*/
	//cout<<"LAST: "<<LAST<<endl;
	ans.resize(a);
	vv.clear();vv.push_back(ONE);vv.push_back(LAST);Fill(vv);
	for(i=2; i<a; i++){
		v.clear();v.push_back(ONE);v.push_back(LAST);v.push_back(vv[i]);Fill(v);
		zx=query(v);
		v.clear();v.push_back(LAST);v.push_back(ONE);v.push_back(vv[i]);Fill(v);
		xc=query(v);
		c=(a+1)-(zx-xc);c/=2;
		ans[vv[i]-1]=c;
	}
	ans[ONE-1]=1;ans[LAST-1]=a;
	answer(ans);
}




//
/*int FA[1009];
int query(vector <int> V){
	int qw=0;
	for(int h=1; h<V.size(); h++){
		qw+=abs(FA[V[h]]-FA[V[h-1]]);
	}
	return qw;
}
void answer(vector <int> P){
	for(int h=0; h<P.size(); h++){
		cout<<P[h]<<" ";
	}
}
int main(){
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	cin>>a;
	for(i=1; i<=a; i++){
		cin>>c;
		FA[i]=c;
	}
	solve(a);
	return 0;
}*/

Compilation message (stderr)

permutation.cpp: In function 'void Fill(std::vector<int>&)':
permutation.cpp:14:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int h=0; h<q.size(); h++){
      |               ~^~~~~~~~~
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: 3 / 15
• Subtask 2: 7 / 35
• Subtask 3: 0 / 50