Submission #639853

#	Time	Username	Problem	Language	Result	Execution time	Memory
639853		a_aguilo	Global Warming (CEOI18_glo)	C++14	10 / 100	124 ms	2348 KiB

glo

#include<bits/stdc++.h>

using namespace std;

int n, x, HI;

int binarySearch(int x, vector<int>& V, int d){
    int hi = V.size()-1;
    int lo = 0;
    while(hi >= lo){
        int mid = lo + (hi - lo)/2;
        if((V[mid]-d) < x) lo = mid+1;
        else hi = mid-1;
    }
    return lo;
}

int main(){
    cin >> n >> x;
    vector<int> nums(n);
    for(int i = 0; i < n; ++i) cin >> nums[i];
    vector<vector<int>> dp(2, vector<int>(1));
    dp[0][0] = nums[0];
    dp[1][0] = nums[0];
    for(int i = 1; i < nums.size(); ++i){

        int pos = binarySearch(nums[i], dp[0], 0);

        if(pos == dp[0].size()){
            dp[0].push_back(nums[i]);
        }
        else dp[0][pos] = nums[i];
        //cout << i <<" " << pos << endl;
        pos = binarySearch(nums[i], dp[1], 0);

        if(pos == dp[1].size()){
            dp[1].push_back(nums[i]);
        }
        else dp[1][pos] = nums[i];

        pos = binarySearch(nums[i], dp[0], x);

        if(pos == dp[1].size()){
            dp[1].push_back(nums[i]);
        }
        else dp[1][pos] = min(dp[1][pos],nums[i]);
    }
    cout << max(dp[0].size(), dp[1].size()) << endl;
    return 0;
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:25:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for(int i = 1; i < nums.size(); ++i){
      |                    ~~^~~~~~~~~~~~~
glo.cpp:29:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         if(pos == dp[0].size()){
      |            ~~~~^~~~~~~~~~~~~~~
glo.cpp:36:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         if(pos == dp[1].size()){
      |            ~~~~^~~~~~~~~~~~~~~
glo.cpp:43:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         if(pos == dp[1].size()){
      |            ~~~~^~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25