 #include <bits/stdc++.h>
using namespace std;

typedef long long int ll;
const char nl = '\n';

ll getMagic(vector<vector<ll>> &grid, ll n, ll m) {
  vector<vector<ll>> dp(n, vector<ll>(m));
  dp[n - 1][m - 1] = 1;
  
  for (ll i = n - 2; i >= 0; i -= 1) {
    dp[i][m - 1] = max(dp[i + 1][m - 1] - grid[i][m - 1], (ll)1);
  }
  
  for (ll i = m - 2; i >= 0; i -= 1) {
    dp[n - 1][i] = max(dp[n - 1][i + 1] - grid[n - 1][i], (ll)1);
  }
  
  for (ll i = n - 2; i >= 0; i -= 1) {
    for (ll j = m - 2; j >= 0; j -= 1) {
      ll curr = min(dp[i][j + 1], dp[i + 1][j]);
      dp[i][j] = max(curr - grid[i][j], (ll)1);
    }
  }
  
  return dp[0][0];
}

int main() {
  ll t;
  cin >> t;
  
  while(t--) {
    ll n, m;
    cin >> n >> m;
    
    vector<vector<ll>> grid(n, vector<ll>(m));
    for (ll i = 0; i < n; i += 1) for (ll j = 0; j < m; j += 1) cin >> grid[i][j];
    
    cout << getMagic(grid, n, m) << nl;
  }
    
  return 0;
}

created 4 years ago by Oishik

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

Supports different platforms like Windows, various Linux flavours, MacOS etc
C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
Case-sensitive
C++ is a compiler based language
C++ supports structured programming language
C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}