oj.uz

Submission #234094

# Submission time Handle Problem Language Result Execution time Memory
234094 2020-05-23T02:44:22 Z super_j6 Exhibition (JOI19_ho_t2) C++14
0 / 100
 5 ms 384 KB 
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second

const int maxn = 100000;
int n, m;
pi a[maxn];
int b[maxn], p[maxn];
vector<pi> v;

bool works(int x){
    for(int i = v[x].s, j = m - 1; ~i; i = p[i], j--){
        if(b[j] < a[i].s) return 0;
    }
    return 1;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);

    cin >> n >> m;
    
    for(int i = 0; i < n; i++) cin >> a[i].s >> a[i].f;
    for(int i = 0; i < m; i++) cin >> b[i];
    
    sort(a, a + n);
    sort(b, b + m);
    
    for(int i = 0; i < n; i++){
        int it = lower_bound(v.begin(), v.end(), (pi){a[i].s, n}) - v.begin();
        if(it < v.size()) v[it] = {a[i].s, i};
        else v.push_back({a[i].s, i});
        p[i] = it ? v[it - 1].s : -1;
    }
    
    int l = -1, r = min(m, (int)v.size());
    while(r - l > 1){
        int mid = (l + r) / 2;
        if(works(mid)) l = mid;
        else r = mid;
    }
    
    cout << (l + 1) << endl;

	return 0;
}

Compilation message

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(it < v.size()) v[it] = {a[i].s, i};
            ~~~^~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 4 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 4 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Incorrect 4 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -