Submission #854459

#	Time	Username	Problem	Language	Result	Execution time	Memory
854459		vjudge1	Odašiljači (COCI20_odasiljaci)	C++17	70 / 70	57 ms	14800 KiB

odasiljaci

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

#pragma GCC optimize("Ofast,O3,unroll-loops")
#define int long long
#define vi vector<int>
#define vvi vector<vi>
#define pii pair<int, int>
#define vpi vector<pii>
#define vvpi vector<vpi>
#define vb vector<bool>
#define vvb vector<vb>
#define endl "\n"
#define sp << " " <<
#define F(i, s, n) for(int i = s; i < n; i++)
#define pb push_back
#define fi first
#define se second
int mod = 998244353;

int inf = LLONG_MAX >> 3;

int mult(int x, int y) {
    return (x%mod)*(y%mod)%mod;
}

const int N = 1001;
vi dad(N);

int find(int x) {
    if(x == dad[x]) return x;
    return dad[x] = find(dad[x]);
}

void unite(int x, int y) {
    dad[find(x)] = find(y);
}

void solve() {
    int n;
    cin >> n;
    F(i, 0, n) dad[i] = i;
    vpi ant;
    vector<pair<double, pii>> edges;
    F(i, 0, n) {
        int x, y;
        cin >> x >> y;
        F(j, 0, ant.size()) {
            pii a = ant[j];
            edges.pb({sqrtl((x-a.fi)*(x-a.fi) + (y-a.se)*(y-a.se)), {i, j}});
        }
        ant.pb({x,y});
    }
    sort(edges.begin(), edges.end());
    double ans = 0;
    F(i, 0, edges.size()) {
        if(find(edges[i].se.fi) != find(edges[i].se.se)) {
            unite(edges[i].se.fi, edges[i].se.se);
            ans = edges[i].fi;
        }
    }
    cout << setprecision(12) << ans/2 << endl;
}

void setIO() {
    ios::sync_with_stdio(0); cin.tie(0);
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #endif
}
signed main() {
    setIO();
    int t = 1;
    //cin >> t;
    while(t--) solve();
}

Compilation message (stderr)

odasiljaci.cpp: In function 'void solve()':
odasiljaci.cpp:15:37: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 | #define F(i, s, n) for(int i = s; i < n; i++)
......
   48 |         F(j, 0, ant.size()) {
      |           ~~~~~~~~~~~~~~~~           
odasiljaci.cpp:48:9: note: in expansion of macro 'F'
   48 |         F(j, 0, ant.size()) {
      |         ^
odasiljaci.cpp:15:37: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<double, std::pair<long long int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 | #define F(i, s, n) for(int i = s; i < n; i++)
......
   56 |     F(i, 0, edges.size()) {
      |       ~~~~~~~~~~~~~~~~~~             
odasiljaci.cpp:56:5: note: in expansion of macro 'F'
   56 |     F(i, 0, edges.size()) {
      |     ^

• Subtask 1: 70 / 70