This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
int h,w;
int m[10][10];
long long ans = 1000000000;
void all(vector<int> q)
{
int max1 = 1000000000,max2 = 1000000000,min1 = 0,min2 =0;
if(q.size() != w)
{
for(int i = q[q.size()-1];i<w;i++)
{
q.push_back(i);
all(q);
q.pop_back();
}
}
else
{
for(int i = 0;i<w;i++)
{
for(int j = 0;j<h;j++)
{
if(j > q[i])
{
max1 = max(max1,m[j][i]);
min1 = min(min1,m[j][i]);
}
else
{
max2 = max(max2,m[j][i]);
min2 = min(min2,m[j][i]);
}
}
}
ans = min(ans,(long long)max(max2-min2,max1-min1));
}
}
int main()
{
cin>>h>>w;
for(int i = 0;i<h;i++)
{
for(int j = 0;j<w;j++)
{
cin>>m[i][j];
}
}
all({});
cout<<ans;
}
Compilation message (stderr)
joioi.cpp: In function 'void all(std::vector<int>)':
joioi.cpp:10:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
10 | if(q.size() != w)
| ~~~~~~~~~^~~~
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