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Submission #420514

# Submission time Handle Problem Language Result Execution time Memory
420514 2021-06-08T12:13:03 Z JvThunder Cigle (COI21_cigle) C++14
0 / 100
 1 ms 204 KB 
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define fir first
#define sec second
typedef long long ll;

using namespace std;

int n;
vector<int> v;

void solve()
{
    cin >> n;
    for(int i=0;i<n;i++)
    {
        int tmp;
        cin >> tmp;
        v.pb(tmp);
    }

    int mxcnt = 0;
    for(int mask=0;mask<(1<<n);mask++)
    {
        int cnt = 0;
        set<int> prv;
        set<int> curr;
        int pos = 0;
        int layer = 0;

        bool impos;
        for(int j=1;j<n;j++)
        {
            int x1,x2;
            if((1<<j)&mask) x1 = 1; 
            if((1<<j-1)&mask) x2 = 1;
            if(x1==x2 && x2==1) impos = true;
        }
        if(impos) break;

        for(int j=0;j<n;j++)
        {
            if((1<<j)&mask)
            {
                layer++;
                prv.clear();
                prv = curr;
                curr.clear();
            }
            int sign = 1;
            if(layer%2) sign *= -1;
            pos += sign*v[j];
            if(prv.find(pos)!=prv.end() && ((1<<j+1)&mask)==0 && j!=n-1) cnt++;
            curr.insert(pos);
        }
        mxcnt = max(mxcnt,cnt);
    }
    cout << mxcnt << endl;
	return;
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	int tc=1;
	//cin>>tc;
	for(int i=1;i<=tc;i++) solve();
 	return 0;
}

Compilation message

cigle.cpp: In function 'void solve()':
cigle.cpp:37:21: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   37 |             if((1<<j-1)&mask) x2 = 1;
      |                    ~^~
cigle.cpp:54:50: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
   54 |             if(prv.find(pos)!=prv.end() && ((1<<j+1)&mask)==0 && j!=n-1) cnt++;
      |                                                 ~^~

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -