Submission #1071363

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071363		12345678	Cultivation (JOI17_cultivation)	C++17	30 / 100	284 ms	780 KiB

cultivation

#include <bits/stdc++.h>

using namespace std;

const int nx=305;

int r, c, n, a[nx], b[nx], res=INT_MAX;
vector<int> d[nx];

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>r>>c>>n;
    for (int i=1; i<=n; i++) cin>>a[i]>>b[i];
    for (int up=0; up<r; up++)
    {
        for (int dn=0; dn<r; dn++)
        {
            for (int i=1; i<=r; i++) d[i].clear();
            int x=0, g=0, y=0, f=0;
            for (int i=1; i<=n; i++) for (int j=max(a[i]-up, 1); j<=min(r, a[i]+dn); j++) d[j].push_back(b[i]);
            for (int i=1; i<=r; i++) 
            {
                if (d[i].empty())
                {
                    f=1;
                    break;
                }
                sort(d[i].begin(), d[i].end());
                x=max(x, d[i][0]-1);
                y=max(y, c-d[i].back());
                for (int j=1; j<d[i].size(); j++) g=max(g, d[i][j]-d[i][j-1]-1);
            }
            if (f) continue;
            if (x+y>=g) res=min(res, up+dn+x+y);
            else res=min(res, up+dn+g);
        }
    }
    cout<<res;
}

Compilation message (stderr)

cultivation.cpp: In function 'int main()':
cultivation.cpp:32:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                 for (int j=1; j<d[i].size(); j++) g=max(g, d[i][j]-d[i][j-1]-1);
      |                               ~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20
• Subtask 6: 0 / 20