Submission #642452

#	Time	Username	Problem	Language	Result	Execution time	Memory
642452		lis05st	Stations (IOI20_stations)	C++17	8 / 100	822 ms	628 KiB

stations

#ifdef LIS05ST
    #define _GLIBCXX_DEBUG
    #define _GLIBCXX_DEBUG_PEDANTIC
#endif
//#pragma GCC optimize("O3")
//#pragma GCC target("avx2,popcnt,lzcnt,bmi,bmi2")
#include"bits/stdc++.h"
using namespace std;
    
typedef long long ll;
typedef long double ld;
    
const int NMAX=1000;
vector<int>g[NMAX+5];
int p[NMAX+5];
int lbl[NMAX+5];
bool used[NMAX+5];
    
void dfs(int v,int l){
    lbl[v]=l;
    used[v]=1;
    l*=2;
    for(auto u:g[v]){
        if(used[u])continue;
        dfs(u,++l);
    }
}
    
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v){
    for(int i=0;i<n;i++){
        p[i]=0;
        used[i]=0;
        lbl[i]=0;
        g[i].clear();
    }
    for(int i=0;i<n-1;i++){
        g[v[i]].push_back(u[i]);
        g[u[i]].push_back(v[i]);
    }
    dfs(0,0);
    vector<int>ans(n);
    for(int i=0;i<n;i++)ans[i]=lbl[i];
    return ans;
};

bool can(int x,int y){
    if(x>y)return 0;
    bitset<32>a(x),b(y);
    int p1=31;int p2=31;
    while(p1>=0&&a[p1]==0)p1--;
    while(p2>=0&&b[p2]==0)p2--;
    for(int i=p1;i>=0;i--){
        if(a[i]==b[p2]){
            p2--;
            continue;
        }else return 0;
    }
    return 1;
}

int find_next_station(int s, int t, std::vector<int> c){
    s++;
    t++;
    for(auto&e:c)e++;
    for(auto u:c){
        if(can(s,u)&&can(u,t))return u-1;
    }
    for(auto u:c){
        if(u<s)return u-1;
    }
};
    
#define MULTITESTS false
void solve(int testCase){
    
}
    
    
void precalc(){
    
}
/*
signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    precalc();
    int t=1;
    if(MULTITESTS)cin>>t;
    for(int i=1;i<=t;i++){
        auto t1=clock();
        solve(i);
        auto t2=clock();
        float delta=t2-t1;
        delta/=CLOCKS_PER_SEC;
        #ifdef LIS05ST
        cout<<"("<<i<<")------------"<<fixed<<setprecision(2)<<delta<<"s\n";
        #endif
    }
}*/

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:71:1: warning: control reaches end of non-void function [-Wreturn-type]
   71 | };
      | ^

• Subtask 1: 0 / 5
• Subtask 2: 8 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61