oj.uz

Submission #923280

# Submission time Handle Problem Language Result Execution time Memory
923280 2024-02-07T04:48:48 Z vjudge1 Maxcomp (info1cup18_maxcomp) C++17
15 / 100
 1 ms 4444 KB 
#include <bits/stdc++.h>

#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

using namespace std;

#define ll long long
#define ld long double
#define pb push_back
#define pf push_front
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define F first
#define S second
#define mem(a,i) memset(a,i,sizeof(a))
#define sz(s) (int)s.size()
#define int ll
#define y1 yy
#define maksim gay
#define ppb pop_back
#define gcd(a,b) __gcd(a,b)
#define in insert

const int dx[4]={-1,0,1,0};
const int dy[4]={0,-1,0,1};

const int inf=1e16;
const int N=5e4+100;
const int MAX=1010;
const int mod=1e9+7;


int n,m;
int a[MAX][MAX];
int mn[MAX][MAX];
int mx[MAX][MAX];

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=0;i<=n;i++)for(int j=0;j<=m;j++){
    mn[i][j]=-inf;
    mx[i][j]=-inf;
  }
  int ans=0;
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      mn[i][j]=max(mn[i-1][j],mn[i][j-1]);
      if(mn[i][j]!=-inf){
        ans=max(ans,a[i][j]+mn[i][j]-i-j);
        // cout<<i<<" "<<j<<" "<<mn[i][j]<<"\n";
      }
      mn[i][j]=max(mn[i][j],-a[i][j]+i+j-1);
    }
  }
  for(int i=1;i<=n;i++){
    for(int j=1;j<=m;j++){
      mx[i][j]=max(mx[i-1][j],mx[i][j-1]);
      if(mx[i][j]!=-inf)ans=max(ans,mx[i][j]-a[i][j]-i-j);
      mx[i][j]=max(mx[i][j],a[i][j]+i+j-1);
    }
  }
  cout<<ans<<"\n";
}

main(){
  // freopen("prizes.in", "r", stdin);
  // freopen("prizes.out", "w", stdout);
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int t=1;
  // cin>>t;
  while(t--){
    solve();
  }
}

Compilation message

maxcomp.cpp:71:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   71 | main(){
      | ^~~~

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Incorrect 1 ms 4444 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Incorrect 1 ms 4444 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Incorrect 1 ms 4444 KB Output isn't correct
4 Halted 0 ms 0 KB -