Submission #159253

#	Time	Username	Problem	Language	Result	Execution time	Memory
159253		Dorina_Sapfiria	Red-blue table (IZhO19_stones)	C++14	100 / 100	48 ms	2288 KiB

stones

#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#define int long long
#define pb push_back
#define F first
#define S second
#define pii pair<int, int>

using namespace std;

void Solve (int n, int m)
{
    if (n>=m)
    {
        int ans=n;
        bool a [n+1][m+1]{};
        vector <pii> v;
        for (int i=1; i<=n; i++)
        {
            v.pb({0, i});
        }
        int j=1;
        int k=m/2+1;
        k=m-k;
        int h=n/2+1;
//        cout << "(" << k << " " << h << ")\n";
        while (j<=m)
        {
            sort(v.begin(), v.end());
            bool fin=0;
            for (int i=0; i<h; i++)
            {
//                cout << "!" << v[i].S << " " << v[i].F << "\n";
                if (v[i].F+1>k)
                {
                    fin=1;
                    break;
                }
            }
            if (fin)
            {
                break;
            }
            for (int i=0; i<h; i++)
            {
//                cout << "--> " << v[i].S << " " << j << "\n";
                a[v[i].S][j]=1;
                v[i].F++;
            }
            ans++;
            j++;
//            cout << "~~~" << j << "\n";
//            cout << "\n";
        }
        cout << ans << "\n";
        for (int i=1; i<=n; i++)
        {
            for (int j=1; j<=m; j++)
            {
                if(a[i][j]) cout << "-";
                else cout << "+";
            }
            cout << "\n";
        }
        return;
    }
    else
    {
        int ans=m;
        bool a[n+1][m+1]{};
        int k=n/2+1;
        k=n-k;
        int h=m/2+1;
//        cout << "(" << k << " " << h << ")\n";
        int j=1;
        vector <pii> v;
        for (int i=1; i<=m; i++)
        {
            v.pb({0, i});
        }
        while (j<=n)
        {
            sort(v.begin(), v.end());
            bool fin=0;
            for (int i=0; i<h; i++)
            {
                if (v[i].F+1>k)
                {
                    fin=1;
                    break;
                }
            }
            if (fin) break;
            for (int i=0; i<h; i++)
            {
                a[j][v[i].S]=1;
                v[i].F++;
            }
            ans++;
            j++;
        }
        cout << ans << "\n";
        for (int i=1; i<=n; i++)
        {
            for (int j=1; j<=m; j++)
            {
                if (a[i][j]) cout << '+';
                else cout << '-';
            }
            cout << "\n";
        }
        return;
    }
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #else
//    freopen("cheval.in", "r", stdin);
//    freopen("cheval.out", "w", stdout);
    #endif // LOCAL
    int t;
    cin >> t;
    while (t--)
    {
        int n,m;
        cin >> n >> m;
        Solve(n, m);
//        cout << "\n";
    }
    return 0;
}

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 16 / 16
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 31 / 31