Submission #964331

#	Time	Username	Problem	Language	Result	Execution time	Memory
964331		Andrey	Global Warming (CEOI18_glo)	C++14	100 / 100	60 ms	6516 KiB

glo

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

long long dude(vector<long long>& haha, long long x) {
    long long l = 0,r = haha.size()-1;
    while(l < r) {
        long long m = (l+r+1)/2;
        if(haha[m] < x) {
            l = m;
        }
        else {
            r = m-1;
        }
    }
    return l;
}

vector<int> br(200001);

void calc(vector<int> haha) {
    reverse(haha.begin(),haha.end());
    for(int i = 0; i < haha.size(); i++) {
        haha[i] = INT_MAX-haha[i];
    }
    vector<long long> bruh(haha.size()+1,INT_MAX);
    bruh[0] = 0;
    for(int i = 0; i < haha.size(); i++) {
        int a = haha[i];
        int c = dude(bruh,a);
        bruh[c+1] = a;
        br[haha.size()-i-1] = c+1;
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,x,ans = 0;
    cin >> n >> x;
    vector<int> haha(n);
    for(int i = 0; i < n; i++) {
        cin >> haha[i];
    }
    calc(haha);
    vector<long long> bruh(n+1,INT_MAX);
    bruh[0] = 0;
    for(int i = 0; i < n; i++) {
        int a = haha[i];
        int c = dude(bruh,a+x);
        ans = max(ans,c+br[i]);
        c = dude(bruh,a);
        ans = max(ans,c+1);
        bruh[c+1] = a;
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'void calc(std::vector<int>)':
glo.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i = 0; i < haha.size(); i++) {
      |                    ~~^~~~~~~~~~~~~
glo.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i = 0; i < haha.size(); i++) {
      |                    ~~^~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 13 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 25 / 25