// Отче наш, сущий на небесах! Да святится имя Твое; да приидет Царствие Твое; да будет воля Твоя и на земле, как на небе; хлеб наш насущный подавай нам на каждый день; и прости нам грехи наши, ибо и мы прощаем всякому должнику нашему; и не введи нас в искушение, но избавь нас от лукавого ML, TL, WA
#include <bits/stdc++.h>
#pragma optimize("Ofast")
#pragma target("avx2")
#define ll long long
#define ld long double
#define pii pair<int,int>
#define F first
#define S second
#define in insert
#define all(v) v.begin(),v.end()
#define pb push_back
#define sz(s) (int)s.size()
#define ppb pop_back
#define mem(a,i) memset(a,i,sizeof(a))
#define lb lower_bound
#define ub upper_bound
#define int ll
using namespace std;
const int MAX=1000+10;
const int N=1000+10;
const int inf=1e18;
const int mod=1e9+9;
const int B=2003;
const ld eps=1e-9;
const int dx[4]={0,0,1,-1};
const int dy[4]={-1,1,0,0};
int binpow(int a,int n){
if(n==0)return 1;
if(n%2==1)return a*binpow(a,n-1)%mod;
int k=binpow(a,n/2);
return (k*k)%mod;
}
int n,m;
int ans;
int a[MAX][MAX];
int d[MAX][MAX];
int good(int i,int j){
return (1<=i&&i<=n&&1<=j&&j<=m);
}
void solve(int si,int sj){
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++)d[i][j]=inf;
}
d[si][sj]=0;
queue<pii> q;
q.push({si,sj});
while(!q.empty()){
int i=q.front().F;
int j=q.front().S;
q.pop();
for(int k=0;k<4;k++){
int ni=i+dx[k];
int nj=j+dy[k];
if(good(ni,nj)&&a[ni][nj]<=a[i][j]&&d[ni][nj]==inf){
d[ni][nj]=d[i][j]+1;
q.push({ni,nj});
}
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(a[i][j]<=a[si][sj]&&d[i][j]!=inf){
ans=max(ans,-d[i][j]-1+a[si][sj]-a[i][j]);
}
}
}
}
void solve(){
cin>>n>>m;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
cin>>a[i][j];
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
solve(i,j);
}
}
cout<<ans<<"\n";
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t=1;
// cin>>t;
while(t--){
solve();
}
}
Compilation message
maxcomp.cpp:4: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
4 | #pragma optimize("Ofast")
|
maxcomp.cpp:5: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
5 | #pragma target("avx2")
|
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Incorrect |
0 ms |
2396 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
3 ms |
2396 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Incorrect |
0 ms |
2396 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Incorrect |
0 ms |
2396 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |