Submission #729476

#	Time	Username	Problem	Language	Result	Execution time	Memory
729476		WKYH	Permutation (APIO22_perm)	C++17	10 / 100	604 ms	51168 KiB

perm

#include<bits/stdc++.h>
#define qc ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define rt return
#define fi first
#define se second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define vecin(a) for(auto &d:a)cin>>d;
typedef long long int ll;
const long long mod=1e9+7;
const int int_inf=2147483647;
const long long int ll_inf=9223372036854775807;
const int alp_up=64;
const int alp_lw=96;
int dx[]={-1,-1,0,1,1,1,0,-1};
int dy[]={0,1,1,1,0,-1,-1,-1};
using namespace std;
ll gcd(ll a,ll b){if(b==0)rt a;rt gcd(b,a%b);}
ll lcm(ll a,ll b){rt a/gcd(a,b)*b;}
void setIO(string name)
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    freopen((name+".in").c_str(),"r",stdin);
    freopen((name+".out").c_str(),"w",stdout);
}

/*
int n;
vector<int>l,r;
void init(int N,vector<int>h)
{
    n=N;
    l.resize(n,-1);
    r.resize(n,-1);
    stack<int>s;
    for(int i=0;i<n;i++)
    {
        while(!s.empty()&&h[s.top()]<h[i])s.pop();
        if(!s.empty())l[i]=s.top();
        s.push(i);
    }
    for(int i=n-1;i>=0;i--)
    {
        while(h[s.top()]<h[i])s.pop();
        if(!s.empty())r[i]=s.top();
        s.push(i);
    }
    //for(auto c:l)cout<<c<<" ";cout<<"\n";
    //for(auto c:r)cout<<c<<" ";cout<<"\n";
}
int minimum_jumps(int a,int b,int c,int d)
{
    queue<pair<int,int>>q;
    vector<bool>vis(n,0);
    for(int i=a;i<=b;i++){
        q.push({i,0});
    }
    while(!q.empty()){
        int x=q.front().first,y=q.front().second;
        q.pop();
        //cout<<x<<" ";
        if(c<=x&&x<=d)rt y;
        if(l[x]!=-1&&!vis[l[x]]){
            q.push({l[x],y+1});
            vis[l[x]]=1;
        }
        if(r[x]!=-1&&!vis[r[x]]){
            q.push({r[x],y+1});
            vis[r[x]]=1;
        }
    }
    rt -1;
}

int main()
{
    init(7, {3, 2, 1, 6, 4, 5, 7});
    cout<<minimum_jumps(4, 4, 6, 6)<<" "<<minimum_jumps(1, 3, 5, 6)<<" "<<minimum_jumps(0, 1, 2, 2);
    rt 0;
}
/*/

vector<int> construct_permutation(ll k)
{
    k-=2;
    vector<int>ans;
    for(int i=k;i>=0;i--){
        ans.push_back(i);
    }
    rt ans;
}
int smain()
{

}

//*/

Compilation message (stderr)

perm.cpp: In function 'int smain()':
perm.cpp:96:1: warning: no return statement in function returning non-void [-Wreturn-type]
   96 | }
      | ^
perm.cpp: In function 'void setIO(std::string)':
perm.cpp:24:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |     freopen((name+".in").c_str(),"r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
perm.cpp:25:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     freopen((name+".out").c_str(),"w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 90