Submission #994050

#	Time	Username	Problem	Language	Result	Execution time	Memory
994050		vjudge1	Kas (COCI17_kas)	C++17	50 / 100	1455 ms	234884 KiB

kas

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

const int N = 505;
const int S = 1e5 + 10;
int n, a[N], ind[S];
vector<int> dp[S], possible;
bool mark[S], poss[S];

int main(){
    cin >> n;
    int total = 0;
    for (int i = 0; i < n; i ++)
        cin >> a[i], total += a[i];
    sort(a, a + n);

    dp[0] = {-1};
    for (int i = 0; i < n; i ++){
        for (int sm = total; sm >= a[i]; sm--){
            if (dp[sm - a[i]].size() == 0 or dp[sm].size()) continue;
            dp[sm] = dp[sm - a[i]];
            dp[sm].push_back(i);
            possible.push_back(sm);
        }
    }
    sort(possible.begin(), possible.end());
    reverse(possible.begin(), possible.end());

    for (int i = 0; i < possible.size(); i ++)
        ind[possible[i]] = i;

    int ite = 0;
    int mx = -1;
    for (int X : possible){
        if (ite >= 2e9) break;
        if (X > (total / 2) or dp[2 * X].size() == 0) continue;

        // cout << "Starting to check " << X << endl;
        for (int i : dp[X]){
            // cout << "marking index = " << i << endl;
            ite++;
            if (~i) mark[i] = 1;
        }

        poss[0] = 1;
        for (int i = 0; i < n; i ++){
            if (mark[i]){
                mark[i] = 0;
                ite++;
                continue;
            }
            for (int j = ind[X]; j < possible.size(); j ++){
                int sm = possible[j];
                ite++;
                if (sm < a[i]) break;
                poss[sm] |= poss[sm - a[i]];
            }
        }

        if (poss[X]){
            mx = X;
            break;
        }

        for (int j = ind[X]; j < possible.size(); j ++){
            int sm = possible[j];
            ite++;
            poss[sm] = 0;      
        }
    }

    if (~mx){
        cout << total - mx << endl;
        return 0;
    }
    
    for (int x = 0; 2 * x < S; x ++)
        if (dp[x].size() and dp[2 * x].size())
            mx = max(mx, x);
    cout << mx + (total - 2 * mx) << endl;
}

Compilation message (stderr)

kas.cpp: In function 'int main()':
kas.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (int i = 0; i < possible.size(); i ++)
      |                     ~~^~~~~~~~~~~~~~~~~
kas.cpp:52:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |             for (int j = ind[X]; j < possible.size(); j ++){
      |                                  ~~^~~~~~~~~~~~~~~~~
kas.cpp:65:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int j = ind[X]; j < possible.size(); j ++){
      |                              ~~^~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 10 / 10
• Subtask 9: 0 / 10
• Subtask 10: 10 / 10