Submission #170562

#	Time	Username	Problem	Language	Result	Execution time	Memory
170562		mdn2002	Unija (COCI17_unija)	C++14	80 / 100	1085 ms	33180 KiB

unija

#include<bits/stdc++.h>
using namespace std;
const long long mod=998244353;
multiset<int>ms;
int n,k;
map<int,int>a;
int v[1000006];
vector<int>b;
int main()
{
    //ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    //freopen("lemonade.in","r",stdin);
    //freopen("lemonade.out","w",stdout);
    scanf("%d",&n);
    for(int i=0;i<n;i++)
    {
        int x,y;
        scanf("%d",&x);
        scanf("%d",&y);
        x/=2;
        y/=2;
        if(a[y+1]==0)
        {
            a[y+1]=++k;
            b.push_back(y+1);
        }
        if(v[a[y+1]]==0)
        {
            v[a[y+1]]=x;
            continue;
        }
        if(v[a[y+1]]<x)v[a[y+1]]=x;
    }
    for(int i=0;i<b.size();i++)ms.insert(v[a[b[i]]]);
    sort(b.begin(),b.end());
    long long ans=0;
    for(int i=0;i<b.size();i++)
    {
        int z=b[i],z1;
        if(i>0)z1=b[i-1];
        else z1=1;
        ans+=*--ms.end()*(z-z1);
        if(v[a[z]]!=0)
        {
            int x=v[a[z]];
            ms.erase(ms.lower_bound(x));
        }
        if(ms.size()==0)break;
    }
    cout<<ans*4;
}

Compilation message (stderr)

unija.cpp: In function 'int main()':
unija.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<b.size();i++)ms.insert(v[a[b[i]]]);
                 ~^~~~~~~~~
unija.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<b.size();i++)
                 ~^~~~~~~~~
unija.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
unija.cpp:20:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&x);
         ~~~~~^~~~~~~~~
unija.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&y);
         ~~~~~^~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 0 / 10