Submission #1099932

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099932		KasymK	Bootfall (IZhO17_bootfall)	C++17	13 / 100	1069 ms	444 KiB

bootfall

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 505;
int a[N];

int main(){
    int n;
    scanf("%d", &n);
    for(int i = 1; i <= n; ++i)
        scanf("%d", a+i);
    // I will solve for fixed Tima's strength, it can be up to O(n^2)
    int sm = accumulate(a+1, a+n+1, 0);
    vector<int> A;
    for(int x = 0; x <= sm; ++x){
        // x => Tima's fixed strength
        // Tima's strength is given, we just need to say whether game is friendly or not.
        // To say that, we need to know every round is draw or not.
        a[n+1] = x;
        bool done = 1;
        // wr;
        for(int ad = 1; ad <= n+1 and done; ++ad){
            // ad's person is recorder in this round
            // He will not play in this round.
            vector<int> v;
            for(int i = 1; i <= n+1; ++i)
                if(i != ad)
                    v.pb(a[i]);
            // for(int i : v)
            //     printf("%d ", i);
            // puts("");
            int wow = accumulate(all(v), 0);
            vector<bool> dp(wow+1, false);
            dp[0] = 1;
            for(int &to : v)
                for(int i = wow; i >= to; --i)
                    if(i >= to and dp[i-to])
                        dp[i] = 1;
            done &= (wow%2 == 0 and dp[wow/2]);
        }
        if(done)
            A.pb(x);
    }
    // wr;
    printf("%d\n", (int)A.size());
    for(int i : A)
        printf("%d ", i);
    puts("");
    return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
bootfall.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("%d", a+i);
      |         ~~~~~^~~~~~~~~~~

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