Submission #682417

#	Time	Username	Problem	Language	Result	Execution time	Memory
682417		vjudge1	Road Construction (JOI21_road_construction)	C++17	38 / 100	6178 ms	162116 KiB

road_construction

#include <bits/stdc++.h>
using namespace std;
#include <ext/rope>
using namespace __gnu_cxx;

// #pragma comment(linker, "/stack:2000000000")
// #pragma GCC optimize("Ofast")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")


typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;

#define precise(a) cout<<fixed<<setprecision(a)
#define sz size()
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(), a.rend()
#define pb push_back
// t1
const ll mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6
const ll MOD = 998244353;  // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod
const ll N = ll(5e5)+10;
const ll K = 17;
const ll inf = 1e18;
const ld eps = 1e-15L;
//const ll B = 316;
ll lcm(ll a, ll b){ return (a / __gcd(a,b)) * b; }
//const ld P = acos(-1.0);

// ll binpow(ll a, ll b, ll m){ ll res=1;a%=m; while(b>0){ if(b&1)res=(res*a)%m; a=(a*a)%m; b/=2; } return res%m;}
ld binpow(ld a, ll b){ ld res=1; while(b>0){ if(b&1)res=(res*a); a=(a*a); b/=2; } return res;}


void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }


void precalc() {
}

ll getdis(ll x1, ll y1, ll x2, ll y2) {
    return abs(x2-x1)+abs(y2-y1);
}

bool comp(pll a, pll b) {
    if(a.ff==b.ff) {
        return a.ss>=b.ss;
    }
    return a.ff<=b.ff;
}

void Baizho()
{   
    ll n, k; cin>>n>>k;
    pll a[n+11];
    bool case2 = 1;
    for(ll i=1; i<=n; i++) {
        cin>>a[i].ff>>a[i].ss;
        if(a[i].ss!=0) case2 = 0;
    }
    sort(a+1, a+n+1, comp);
    set<pair<ll, pll> > st;
    if(n<=1000) {
        vector<ll>vec;
        for(ll i=1; i<=n-1; i++) {
            for(ll j=i+1; j<=n; j++) {
                ll x1 = a[i].ff, y1 = a[i].ss, x2 = a[j].ff, y2 = a[j].ss;
                ll dist = getdis(x1, y1, x2, y2);
                vec.pb(dist);
            }
        }
        sort(all(vec));
        for(ll i=1; i<=k; i++) {
            cout<<vec[i-1]<<"\n";
        }
        return;
    }
    for(ll i=1; i<=n-1; i++) {
        for(ll j=i+1; j<=i+10 && j<=n; j++) {
            ll x1 = a[i].ff, y1 = a[i].ss, x2 = a[j].ff, y2 = a[j].ss;
            ll dist = getdis(x1, y1, x2, y2);
            st.insert({dist, {i, j}});
        }
    }
    for(ll i=1; i<=k; i++) {
        pair<ll, pll> get = (*st.begin());
        cout<<get.ff<<"\n";
        st.erase(get);
        if(get.ss.ss!=n) {
            for(ll j = get.ss.ss+1; j<=get.ss.ss+10 && j<=n; j++) {
                ll p = get.ss.ff;
                ll x1 = a[p].ff, y1 = a[p].ss, x2 = a[j].ff, y2 = a[j].ss;
                ll dist = getdis(x1, y1, x2, y2);
                st.insert({dist, {p, j}});
            }
        }
    }
    
}

    
int main() {

    // Freopen("div7");
    ios_base::sync_with_stdio(false);   
    cin.tie(0);cout.tie(0); 

    precalc();

    int ttt = 1;
    // cin>>ttt;

    for(int i=1; i<=ttt; i++) { Baizho();}
}

Compilation message (stderr)

road_construction.cpp: In function 'void Baizho()':
road_construction.cpp:58:10: warning: variable 'case2' set but not used [-Wunused-but-set-variable]
   58 |     bool case2 = 1;
      |          ^~~~~
road_construction.cpp: In function 'void Freopen(std::string)':
road_construction.cpp:37:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
road_construction.cpp:37:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                                                                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 7 / 7
• Subtask 4: 20 / 20
• Subtask 5: 0 / 27
• Subtask 6: 0 / 35