Submission #124029

#	Time	Username	Problem	Language	Result	Execution time	Memory
124029		HassenAissa	Circle selection (APIO18_circle_selection)	C++14	0 / 100	2140 ms	71128 KiB

circle_selection

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

int main()
{
    map<int,set<pair<int,int> >,greater<int> >circles;
    map<pair<pair<int,int>,int>,int> memo;
    vector<pair<pair<int,int>,int> > tab;
    vector<int> res;

    int n;
    int x,y,z;
    scanf("%d",&n);
    res.resize(n);
    for(int i=0; i<n; i++)
    {
        scanf("%d%d%d",&x,&y,&z);
        circles[z].insert(make_pair(x,y));
        memo[make_pair(make_pair(x,y),z)]=i;
        tab.push_back(make_pair(make_pair(x,y),z));
        res[i]=i+1;
    }
    map<int,set<pair<int,int> >,greater<int> >::iterator it;
    int done=0;
    while(done!=n)
    {
        bool test=0;
        int a,b,c;
        for(it=circles.begin(); it!=circles.end(); ++it)
        {
            int r=it->first;
            if((it->second).size()!=0 && test==0)
            {
                test=1;
                done++;
                c=it->first;
                a=((it->second).begin())->first;
                b=((it->second).begin())->second;
                (it->second).erase((it->second).begin());
            }
            set<pair<int,int> >::iterator posi;
            for(posi=(it->second).begin(); posi!=(it->second).end(); ++posi)
            {
                int q=posi->first;
                int p=posi->second;
                if((c+r)*(c+r)>=(q-a)*(q-a)+(p-b)*(p-b))
                {
                    done++;
                    res[memo[make_pair(make_pair(q,p),r)]]=memo[make_pair(make_pair(a,b),c)]+1;
                    (it->second).erase(posi);
                }
            }
        }
    }
    for(int i=0; i<n; i++)
    {
        printf("%d ",res[i]);
    }
}

Compilation message (stderr)

circle_selection.cpp: In function 'int main()':
circle_selection.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
circle_selection.cpp:17:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&x,&y,&z);
         ~~~~~^~~~~~~~~~~~~~~~~~~
circle_selection.cpp:46:22: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
                 if((c+r)*(c+r)>=(q-a)*(q-a)+(p-b)*(p-b))
                    ~~^~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 12
• Subtask 3: 0 / 15
• Subtask 4: 0 / 23
• Subtask 5: 0 / 30
• Subtask 6: 0 / 13