Submission #1122162

#	Time	Username	Problem	Language	Result	Execution time	Memory
1122162		Aviansh	Feast (NOI19_feast)	C++17	4 / 100	1071 ms	24104 KiB

feast

#include <bits/stdc++.h>

using namespace std;

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n,k;
    cin >> n >> k;
    vector<long long> arr(n);
    for(int i = 0;i<n;i++){
        cin >> arr[i];
    }
    long long ans = 0;
    while(arr.size()>1){
        multiset<long long>topk;
        vector<long long>temp;
        temp.push_back(arr[0]);
        for(int i = 1;i<n;i++){
            if(temp.back()<0&&arr[i]<0){
                temp.back()+=arr[i];
            }
            else if(temp.back()>0&&arr[i]>0){
                temp.back()+=arr[i];
            }
            else{
                temp.push_back(arr[i]);
            }
        }
        arr=temp;
        for(int i =0;i<arr.size();i++){
            topk.insert(arr[i]);
        }
        while(topk.size()>k){
            topk.erase(topk.begin());
        }
        long long sum = 0;
        for(long long a : topk){
            sum+=a;
        }
        ans=max(ans,sum);
        int minind = min_element(arr.begin(),arr.end())-arr.begin();
        for(int i = 0;i<arr.size();i++){
            if(arr[i]<=0&&arr[i]>arr[minind]){
                minind=i;
            }
        }
        if(minind==0||minind==arr.size()-1){
            arr.erase(arr.begin()+minind);
            continue;
        }
        if(minind!=arr.size()-1){
            arr[minind]+=arr[minind+1];
            arr.erase(arr.begin()+minind+1);
        }
        if(minind){
            arr[minind]+=arr[minind-1];
            arr.erase(arr.begin()+minind-1);
        }
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

feast.cpp: In function 'int main()':
feast.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         for(int i =0;i<arr.size();i++){
      |                      ~^~~~~~~~~~~
feast.cpp:34:26: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |         while(topk.size()>k){
      |               ~~~~~~~~~~~^~
feast.cpp:43:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         for(int i = 0;i<arr.size();i++){
      |                       ~^~~~~~~~~~~
feast.cpp:48:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         if(minind==0||minind==arr.size()-1){
      |                       ~~~~~~^~~~~~~~~~~~~~
feast.cpp:52:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         if(minind!=arr.size()-1){
      |            ~~~~~~^~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 18
• Subtask 4: 0 / 10
• Subtask 5: 0 / 11
• Subtask 6: 0 / 20
• Subtask 7: 0 / 29