Submission #364865

#	Time	Username	Problem	Language	Result	Execution time	Memory
364865		tengiz05	Maxcomp (info1cup18_maxcomp)	C++17	100 / 100	49 ms	8192 KiB

maxcomp

#include <bits/stdc++.h>
using namespace std;
template <class T> inline void read(T &x) {
	x = 0; register char ch = getchar();
	for (; ch<'0' || ch>'9';) ch = getchar();
	for (; ch>='0' && ch<='9';) x = x*10 + ch-'0', ch = getchar();
}

//~ #define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
template<class T> inline void chmin(T& a, const T& b) {if(a>b)a=b;}
template<class T> inline void chmax(T& a, const T& b) {if(a<b)a=b;}
const int mod = 1e9+7, N = 1005;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val)-1;}
int n, m, k;
int a[N][N];
int dp[N][N];
inline void solve(int test_case){
	int i, j;
	read(n);read(m);
	memset(a, 245, sizeof a);
	for(i=1;i<=n;i++){
		for(j=1;j<=m;j++){
			read(a[i][j]);
		}
	}
	for(i=1;i<=n;i++){
		for(j=1;j<=m;j++){
			dp[i][j] = a[i][j];
			chmax(dp[i][j], dp[i-1][j]-1);
			chmax(dp[i][j], dp[i][j-1]-1);
		}
	}
	
	for(i=n;i>=1;i--){
		for(j=m;j>=1;j--){
			chmax(dp[i][j],a[i][j]);
			chmax(dp[i][j], dp[i+1][j]-1);
			chmax(dp[i][j], dp[i][j+1]-1);
		}
	}
	int ans = -1;
	for(i=1;i<=n;i++){
		for(j=1;j<=m;j++){
			chmax(ans, dp[i][j] - a[i][j]);
		}
	}
	cout << ans-1 << '\n';
	return;
}
/*

2 3
5 7 5
2 4 3

*/
signed main(){
	//~ FASTIO;
//~ #define MULTITEST 1
#if MULTITEST
	int _T;
	cin >> _T;
	for(int T_CASE = 1; T_CASE <= _T; T_CASE++)
		solve(T_CASE);
#else
	solve(1);
#endif
	return 0;
}

Compilation message (stderr)

maxcomp.cpp: In function 'void read(T&)':
maxcomp.cpp:4:23: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
    4 |  x = 0; register char ch = getchar();
      |                       ^~
maxcomp.cpp: In instantiation of 'void read(T&) [with T = int]':
maxcomp.cpp:27:8:   required from here
maxcomp.cpp:4:23: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40