oj.uz

Submission #799688

# Submission time Handle Problem Language Result Execution time Memory
799688 2023-07-31T20:15:15 Z n3rm1n Exhibition (JOI19_ho_t2) C++17
0 / 100
 0 ms 212 KB 
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const long long MAXN = 1e5 + 10;
void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
long long n, m;
vector < pair < long long , long long > > g;
vector < long long > frames;
void read()
{
    cin >> n >> m;
    long long xx, yy;
    for (long long i = 1; i <= n; ++ i)
    {
        cin >> xx >> yy;
        g.push_back(make_pair(yy, xx));
    }
    sort(g.begin(), g.end());
    for (long long i = 1; i <= m; ++ i)
    {
        cin >> xx;
        frames.push_back(-xx);
    }
    sort(frames.begin(), frames.end());
}
vector < long long > v;
bool check(long long goal)
{
    v.clear();
    v.push_back(-1);
    long long x;
    long long sz = goal-1;
    for (long long i = 0; i < g.size(); ++ i)
    {
        x = g[i].second;
        if(x >= (long long)v.back() && x <= -frames[sz])
        {
            v.push_back(x);
            sz --;
        }
        else
        {
            vector < long long >::iterator it = upper_bound(v.begin(), v.end(), x);
            if(it == v.end())continue;
            long long num = *it, index = it - v.begin();
            v[index] = x;
        }
    }
   return (sz <= 0);
}
void bin_search()
{
    long long l = 1, r = m, mid, ans = 0;
    while(l <= r)
    {
        mid = (l + r)/2;
        if(check(mid))
        {
            ans = mid;
            l = mid + 1;
        }
        else r = mid - 1;
    }
    cout << ans << endl;
}
int main()
{
    speed();

    read();
    bin_search();
    return 0;
}
/**
10 10
978749728 144544247
765886828 382970504
724321206 775440108
793469869 329793955
744661733 757784475
737531928 772848949
880702330 298220471
886356598 234769581
756489712 541017091
976784156 205683907
498207927
462526472
688444509
591128229
744661733
421432475
299894333
737531928
39584784
724321206
*/

Compilation message

joi2019_ho_t2.cpp: In function 'bool check(long long int)':
joi2019_ho_t2.cpp:38:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for (long long i = 0; i < g.size(); ++ i)
      |                           ~~^~~~~~~~~~
joi2019_ho_t2.cpp:50:23: warning: unused variable 'num' [-Wunused-variable]
   50 |             long long num = *it, index = it - v.begin();
      |                       ^~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -