Submission #892853

#	Time	Username	Problem	Language	Result	Execution time	Memory
892853		vjudge1	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	1 ms	600 KiB

joi2019_ho_t4

#include "bits/stdc++.h"
using namespace std;       

// #pragma comment(linker, "/stack:200000000")
// #pragma GCC optimize("Ofast")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

using ll = long long;
using ld = long double;
#define pb push_back
#define ff first
#define ss second
#define sz(x) (ll)(x).size()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

void freopen(string s) { freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); }
void IOIGold2024_InshAllah() { ios_base::sync_with_stdio(false); cin.tie(NULL); }
ll binmul(ll a, ll b, ll c) { ll res = 0; while(b) { if(b&1) (res += a) %= c; (a += a) %= c; b >>= 1; } return res; }
ll binpow(ll a, ll b, ll c) { ll res = 1; while(b) { if(b&1) (res *= a) %= c; (a *= a) %= c; b >>= 1; } return res; }
template<typename T> T gcd(T a, T b) { if(b==0) return a; return gcd(b, a%b); }
template<typename T> T lcm(T a, T b) { return a/gcd(a, b)*b; }
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ld rnd() { return rng()%INT_MAX*1.0/INT_MAX; }

const ll inf = 1e18+7, MX = LLONG_MAX, MN = LLONG_MIN;
const ll mod = 1e9+7, N = 3e5+5;
ll used[N], have[N][3];

void kigash() {
    ll n;
    cin>>n;
    vector<pair<ll, ll>> v;
    for(ll i=1; i<=2*n; i++) {
        ll x, y;
        cin>>x>>y;
        v.pb({x, y});
    }
    ll ans = 0;
    while(1) {
        ll mn = MX, x1 = -1, y1 = -1, x2 = -1, y2 = -1;
        for(ll i=1; i<=2*n; i++) {
            if(used[i]) continue;
            for(ll j=1; j<=n; j++) {
                for(ll k=1; k<=2; k++) {
                    if(have[j][k]) continue;
                    ll x = v[i-1].ff, y = v[i-1].ss;
                    if(abs(x-j)+abs(y-k)<mn) {
                        mn = abs(x-j)+abs(y-k);
                        x1 = i, x2 = j, y2 = k;
                    }
                }
            }
        }
        if(mn==MX) break;
        ans += mn;
        used[x1] = have[x2][y2] = 1;
    }
    cout<<ans<<"\n";
    return;
}

signed main(/*Kigash Amir*/) {
    // freopen("");
    IOIGold2024_InshAllah();
    ll tt = 1;
    // cin>>tt;
    for(ll i=1; i<=tt; i++) {
        kigash();
    }
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'void kigash()':
joi2019_ho_t4.cpp:41:30: warning: unused variable 'y1' [-Wunused-variable]
   41 |         ll mn = MX, x1 = -1, y1 = -1, x2 = -1, y2 = -1;
      |                              ^~
joi2019_ho_t4.cpp: In function 'void freopen(std::string)':
joi2019_ho_t4.cpp:17:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 | void freopen(string s) { freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); }
      |                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:17:73: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 | void freopen(string s) { freopen((s+".in").c_str(), "r", stdin); freopen((s+".out").c_str(), "w", stdout); }
      |                                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63