Submission #791426

#	Time	Username	Problem	Language	Result	Execution time	Memory
791426		Amylopectin	Roads (CEOI20_roads)	C++14	15 / 100	77 ms	8552 KiB

roads

#include <stdio.h>
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
const long long mxn = 1e6 + 10;
struct we
{
    long long xx,yy,xx2,yy2;
    double slo,soo;
};
bool cmp(const struct we &l,const struct we &r)
{
    if(l.soo != r.soo)
        return l.soo < r.soo;
    if(l.xx != r.xx)
        return l.xx < r.xx;
    return l.yy < r.yy;
}
struct we ta[mxn] = {};
int main()
{
    long long i,j,n,m,cn,cm,fn,fm,f,sta = 0;
    double t,p;
    scanf("%lld",&n);
    for(i=0; i<n; i++)
    {
        scanf("%lld %lld %lld %lld",&cn,&cm,&fn,&fm);
        if(cn > fn || (cn == fn && cm > fm))
        {
            f = cn;
            cn = fn;
            fn = f;
            f = cm;
            cm = fm;
            fm = f;
        }
        ta[i] = {cn,cm,fn,fm,0,0};
        if(fn - cn == 0)
        {
            sta = 1;
        }
        else 
        {
            t = fm - cm;
            p = fn - cn;
            ta[i].slo = t / p;
        }
    }
    if(sta == 1)
    {
        for(i=0; i<n; i++)
        {
            ta[i].soo = ta[i].xx;
        }
    }
    else 
    {
        for(i=0; i<n; i++)
        {
            t = ta[i].xx;
            f = ta[i].yy;
            ta[i].soo = f - t * ta[i].slo;
        }
    }
    sort(ta,ta+n,cmp);
    printf("\n");
    for(i=0; i<n-1; i++)
    {
        if(ta[i].soo != ta[i+1].soo)
        {
            printf("%lld %lld %lld %lld\n",ta[i].xx,ta[i].yy,ta[i+1].xx,ta[i+1].yy);
        }
        else 
        {
            printf("%lld %lld %lld %lld\n",ta[i].xx2,ta[i].yy2,ta[i+1].xx,ta[i+1].yy);
        }
    }
    return 0;
}

Compilation message (stderr)

roads.cpp: In function 'int main()':
roads.cpp:23:17: warning: unused variable 'j' [-Wunused-variable]
   23 |     long long i,j,n,m,cn,cm,fn,fm,f,sta = 0;
      |                 ^
roads.cpp:23:21: warning: unused variable 'm' [-Wunused-variable]
   23 |     long long i,j,n,m,cn,cm,fn,fm,f,sta = 0;
      |                     ^
roads.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
roads.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         scanf("%lld %lld %lld %lld",&cn,&cm,&fn,&fm);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 15 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 40