Submission #557831

#	Time	Username	Problem	Language	Result	Execution time	Memory
557831		hibiki	Examination (JOI19_examination)	C++11	100 / 100	342 ms	22928 KiB

examination

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

#define PB push_back
#define F first
#define S second

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template <typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

int n,q;
int sA[100005],sB[100005];
int qA[100005],qB[100005],qC[100005],ans[100005];
vector<pair<int,pair<int,int> > > poi;

int main()
{
    scanf("%d %d",&n,&q);
    for(int i=0;i<n;i++)
    {
        scanf("%d %d",&sA[i],&sB[i]);
        poi.PB({ -(sA[i]+sB[i]) , {0,i} });
    }
    for(int i=0;i<q;i++)
    {
        scanf("%d %d %d",&qA[i],&qB[i],&qC[i]);
        poi.PB({ -max(qA[i]+qB[i],qC[i]) , {1,i} });
    }

    sort(poi.begin(),poi.end());

    int all=0;
    ordered_set<pair<int,int> > oA,oB;
    for(int i=0;i<poi.size();i++)
    {
        int ty=poi[i].S.F;
        int idx=poi[i].S.S;
        if(!ty)
        {
            all++;
            oA.insert({sA[idx],idx});
            oB.insert({sB[idx],idx});
        }
        else
        {
            ans[idx] = all - oA.order_of_key({qA[idx],0}) - oB.order_of_key({qB[idx],0});
        }
    }

    for(int i=0;i<q;i++)
        printf("%d\n",ans[i]);

    return 0;
}

Compilation message (stderr)

examination.cpp: In function 'int main()':
examination.cpp:37:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int i=0;i<poi.size();i++)
      |                 ~^~~~~~~~~~~
examination.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%d %d",&n,&q);
      |     ~~~~~^~~~~~~~~~~~~~~
examination.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf("%d %d",&sA[i],&sB[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         scanf("%d %d %d",&qA[i],&qB[i],&qC[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57