Submission #2698941

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Source Code Expand

#include<bits/stdc++.h>

#define FOR(i, a, b) for(int(i)=(a);(i)<(b);(i)++)
#define REP(i, n) FOR((i), 0, (n))

#define RFOR(i, b, a) for(int(i)=(b); (i)>=(a); (i)--)
#define RREP(i, n) FOR((i), (n), 0)

#define pb push_back
#define mp make_pair

using namespace std;

const int INF=INT_MAX/4;
const int MOD=1000000007;
const double EPS=1e-14;

const bool debug_flag=true;

void debug(string str){
    if(debug_flag){
        cout<<str;
    }
}

int main(int argc, char* argv[]){
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout.precision(10);

    int n;
    cin>>n;
    vector<int> x(n), y(n);
    for(int i=0; i<n; ++i){
        cin>>x[i]>>y[i];
    }

    double m=0;
    for(int i=0; i<n; ++i){
        for(int j=0; j<n; ++j){
            if(m < (x[i]-x[j])*(x[i]-x[j]) + (y[i]-y[j])*(y[i]-y[j])){
                m = (x[i]-x[j])*(x[i]-x[j]) + (y[i]-y[j])*(y[i]-y[j]);
            }
        }
    }
    cout<<sqrt(m)<<endl;
    return 0;
}

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