Submission #90496

#	Time	Username	Problem	Language	Result	Execution time	Memory
90496		psmao	Maja (COCI18_maja)	C++14	0 / 110	4 ms	812 KiB

maja

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

#define fo(i,s,t) for(int i = s; i <= t; ++ i)
#define fd(i,s,t) for(int i = s; i >= t; -- i)
#define bf(i,s) for(int i = head[s]; i; i = e[i].next)
#define mp make_pair
#define fi first
#define se second
#define pii pair<int,int>
#define pb push_back
#define VI vector<int>
#define sf scanf
#define pf printf
#define fp freopen
#define SZ(x) ((int)(x).size())
#ifdef MPS
#define D(x...) printf(x)
#else
#define D(x...)
#endif
typedef long long ll;
typedef double db;
typedef unsigned long long ull;
const int inf = 1<<30;
const ll INF = 1ll<<60;
const db Inf = 1e20;
const db eps = 1e-9;

void gmax(int &a,int b){a = (a > b ? a : b);}
void gmin(int &a,int b){a = (a < b ? a : b);}

const int maxn = 105;
const int dx[] = {0, 0, 1, -1};
const int dy[] = {-1, 1, 0, 0};

int n, m, A[maxn][maxn], d[maxn][maxn], P[maxn][maxn], a, b, K;
ll V[maxn][maxn], Ans;
vector<pii> candi;

bool cmp(pii a, pii b){return d[a.fi][a.se] <= d[b.fi][b.se];}
int main()
{
	#ifdef MPS
		fp("1.in","r",stdin);
		fp("1.out","w",stdout);
	#endif
	sf("%d%d%d%d%d",&n,&m,&a,&b,&K);
	fo(i,1,n) fo(j,1,m) sf("%d",&A[i][j]);
	fo(i,1,n) fo(j,1,m) fo(k,0,3) P[i][j] = max(P[i][j], A[i][j] + A[i+dx[k]][j+dy[k]]);
	queue<pii> Q;
	memset(d,0xff,sizeof(d));
	Q.push(mp(a,b));
	d[a][b] = 0;
	while(!Q.empty())
	{
		pii h = Q.front(); Q.pop();
		fo(i,0,3)
		{
			int nx = h.fi + dx[i], ny = h.se + dy[i];
			if(nx < 1 || ny < 1 || nx > n || ny > m) continue;
			if(d[nx][ny] != -1) continue;
			d[nx][ny] = d[h.fi][h.se] + 1;
			Q.push(mp(nx, ny));
		}
	}
	fo(i,1,n) fo(j,1,m) candi.pb(mp(i,j)), V[i][j] = -inf;
	sort(candi.begin(),candi.end(),cmp);
	for(auto q : candi)
	{
		int i = q.fi, j = q.se; 
		fo(k,0,3) 
		{
			int nx = i + dx[k], ny = j + dy[k];
			if(nx < 1 || ny < 1 || nx > n || ny > m || d[nx][ny] + 1 != d[i][j]) continue;
			V[i][j] = max(V[i][j], V[nx][ny] + A[i][j]);
		}
	}
	fo(i,1,n) fo(j,1,m) 
	{
		int k = K/2-d[i][j];
		if(k < 0) continue;
		Ans = max(Ans, 1ll*k*P[i][j] + V[i][j]*2 - A[i][j]);
	}
	cout << Ans << endl;
	return 0;
}

Compilation message (stderr)

maja.cpp: In function 'int main()':
maja.cpp:48:4: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  sf("%d%d%d%d%d",&n,&m,&a,&b,&K);
    ^
maja.cpp:49:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fo(i,1,n) fo(j,1,m) sf("%d",&A[i][j]);
                        ^

• Subtask 1: 0 / 11
• Subtask 2: 0 / 11
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 11
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 11
• Subtask 9: 0 / 11
• Subtask 10: 0 / 11