Submission #38257

#	Time	Username	Problem	Language	Result	Execution time	Memory
38257		antimirage	Bootfall (IZhO17_bootfall)	C++14	28 / 100	1000 ms	22464 KiB

bootfall

#include <iostream>
#include <vector>
#include <deque>
#include <math.h>
#include <set>
#include <iomanip>
#include <time.h>
#include <list>
#include <stdio.h>
#include <queue>
#include <map>
#include <algorithm>
#include <assert.h>
#include <memory.h>

#define mk make_pair
#define sc second
#define fr first
#define pb emplace_back
#define all(s) s.begin(), s.end()
#define sz(s) ( (int)s.size() )

using namespace std;

const int N = 275;

bool dp[N][N * N];

int n, ar[N], mx = 270 * 270, sum;

vector <int> ans;

main ()
{
    cin >> n;

    for (int i = 1; i <= n; i++)
        scanf("%d", &ar[i]), sum += ar[i];

    mx = sum;

    for (int i = 0; i <= n; i++)
    {
        dp[i][0] = 1;
        for (int j = 1; j <= n; j++)
        {
            if (i == j) continue;

            for (int k = mx - ar[j]; k >= 0; k--)
                dp[i][k + ar[j]] |= dp[i][k];
        }
    }
    if ( sum & 1 || !dp[0][sum / 2] )
    {
        puts("0");
        return 0;
    }
    for (int i = 0; i <= mx; i++)
    {
        bool fl = true;
        for (int j = 1; j <= n; j++)
        {
            if ( ( (sum - ar[j] + i) & 1 ) || !dp[j][ (sum - ar[j] + i) / 2 - i ] ) {
                fl = false;
            break;
            }
        }
        if (fl)
            ans.pb(i);
    }
    cout << sz(ans) << endl;
    for (auto x : ans)
        printf("%d ", x);
}

Compilation message (stderr)

bootfall.cpp:33:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main ()
       ^
bootfall.cpp: In function 'int main()':
bootfall.cpp:38:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &ar[i]), sum += ar[i];
                                          ^

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35