Language: C++

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

short dp[5000][5000];
int main(){
	int N,M;
	cin >> N >> M;
	for(int i = 0 ; i < M ; i++){
		int x,y,c;
		cin >> y >> x >> c;
		dp[y-1][x-1] = c+1;		
	}
	for(int i = 0 ; i < N ; i++){
		for(int j = 0 ; j < N ; j++){
			dp[i+1][j] = max(dp[i+1][j],dp[i][j]-1);
			dp[i+1][j+1] = max(dp[i+1][j+1],dp[i][j]-1);
		}
	}
	int ans = 0;
	for(int i = 0 ; i < N ; i++){
		for(int j = 0 ; j < N ; j++){
			ans += !!dp[i][j];
		}
	}
	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:41: error: no matching function for call to 'max(short int&, int)'
   16 |                         dp[i+1][j] = max(dp[i+1][j],dp[i][j]-1);
      |                                      ~~~^~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:16:41: note:   deduced conflicting types for parameter 'const _Tp' ('short int' and 'int')
   16 |                         dp[i+1][j] = max(dp[i+1][j],dp[i][j]-1);
      |                                      ~~~^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:16:41: note:   mismatched types 'std::initializer_list<_Tp>' and 'short int'
   16 |                         dp[i+1][j] = max(dp[i+1][j],dp[i][j]-1);
      |                                      ~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc:17:43: error: no matching function for call to 'max(short int&, int)'
   17 |                         dp[i+1][j+1] = max(dp[i+1][j+1],dp[i][j]-1);
      |                                        ~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:17:43: note:   deduced conflicting types for parameter 'const _Tp' ('short int' and 'int')
   17 |                         dp[i+1][j+1] = max(dp[i+1][j+1],dp[i][j]-1);
      |                                        ~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:17:43: note:   mismatched types 'std::initializer_list<_Tp>' and 'short int'
   17 |                         dp[i+1][j+1] = max(dp[i+1][j+1],dp[i][j]-1);
      |                                        ~~~^~~~~~~~~~~~~~~~~~~~~~~~~