Valentine Plan

#include<stdio.h>
#include<cmath>
using namespace std;

typedef struct{
    double x;
    double y;
}pos;

double dist(pos a,pos b){
    return sqrt((a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y));
}

int main()
{
    int n,m;
    scanf("%d %d",&n,&m);
    pos male[n];
    pos female[m];
    for(int i=0;i<n;i++){
        scanf("%lf %lf",&male[i].x,&male[i].y);
    }
    for(int i=0;i<m;i++){
        scanf("%lf %lf",&female[i].x,&female[i].y);
    }
    double mindist = 2e9;
    for(int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(dist(male[i],female[j]) < mindist){
                mindist = dist(male[i],female[j]);
            }
        }
    }
    printf("%.3lf",mindist);
    return 0;
}