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#include <bits/stdc++.h>
//#pragma GCC optimize("O3")
//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
//#pragma GCC target("avx,tune=native")
//float __attribute__((aligned(32)))
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef unsigned int uint;
ll sqr(ll x){
return x * x;
}
int mysqrt(ll x){
int l = 0, r = 1e9 + 1;
while (r - l > 1){
int m = (l + r) / 2;
if (m * (ll)m <= x)
l = m;
else
r = m;
}
return l;
}
mt19937 rnd(1227);
mt19937_64 rndll(12365);
ll AR = 19, BR = 13, CR = 23, XR = 228, YR = 322, MODR = 1e9 + 993;
ll myrand(){
ll ZR = (XR * AR + YR * BR + CR) % MODR;
XR = YR;
YR = ZR;
return ZR;
}
const int Mod = 1e9 + 9;
int bpow(int x, int y){
if (y == 0)
return 1;
if (y == 1)
return x;
int ret = bpow(x, y >> 1);
ret = (ret * (ll)ret) % Mod;
if (y & 1)
ret = (ret * (ll)x) % Mod;
return ret;
}
int bdiv(int x, int y){
return (x * (ll)bpow(y, Mod - 2)) % Mod;
}
void setmin(int &x, int y){
x = min(x, y);
}
void setmax(int &x, int y){
x = max(x, y);
}
void setmin(ll &x, ll y){
x = min(x, y);
}
void setmax(ll &x, ll y){
x = max(x, y);
}
int gcd(int a, int b){
return a ? gcd(b % a, a) : b;
}
const ll llinf = 2e18 + 100;
const double eps = 1e-9;
const int maxn = 2e5 + 100, maxw = 1e7 + 100, inf = 2e9 + 100, sq = 300, mod = 1e9 + 9, LG = 17;
int n, m;
int a[1000][1000];
int q[1000][1000];
int get(int i, int j){
if (i >= 0 && j >= 0 && i < n && j < m)
return q[i][j];
return -inf;
}
int main()
{
#ifdef ONPC
//ifstream cin("a.in");
//ofstream cout("a.out");
freopen("a.in", "r", stdin);
freopen("a.out", "w", stdout);
#else
//ifstream cin("gymnasts.in");
//ofstream cout("gymnasts.out");
//freopen("sort.in", "r", stdin);
//freopen("sort.out", "w", stdout);
#endif // ONPC
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
cin >> a[i][j];
int ans = 0;
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
q[i][j] = max(-a[i][j] + i + j, max(get(i - 1, j), get(i, j - 1))),
setmax(ans, a[i][j] - i - j + q[i][j]);
for (int i = n - 1; i >= 0; i--)
for (int j = m - 1; j >= 0; j--)
q[i][j] = max(-a[i][j] - i - j, max(get(i + 1, j), get(i, j + 1))),
setmax(ans, a[i][j] + i + j + q[i][j]);
for (int i = n - 1; i >= 0; i--)
for (int j = 0; j < m; j++)
q[i][j] = max(-a[i][j] - i + j, max(get(i + 1, j), get(i, j - 1))),
setmax(ans, a[i][j] + i - j + q[i][j]);
for (int i = 0; i < n; i++)
for (int j = m - 1; j >= 0; j--)
q[i][j] = max(-a[i][j] + i - j, max(get(i - 1, j), get(i, j + 1))),
setmax(ans, a[i][j] - i + j + q[i][j]);
cout << ans - 1;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
596 KB |
Output is correct |
3 |
Correct |
2 ms |
600 KB |
Output is correct |
4 |
Correct |
2 ms |
600 KB |
Output is correct |
5 |
Correct |
2 ms |
736 KB |
Output is correct |
6 |
Correct |
2 ms |
736 KB |
Output is correct |
7 |
Correct |
2 ms |
736 KB |
Output is correct |
8 |
Correct |
2 ms |
736 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
760 KB |
Output is correct |
2 |
Correct |
2 ms |
768 KB |
Output is correct |
3 |
Correct |
2 ms |
792 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
596 KB |
Output is correct |
3 |
Correct |
2 ms |
600 KB |
Output is correct |
4 |
Correct |
2 ms |
600 KB |
Output is correct |
5 |
Correct |
2 ms |
736 KB |
Output is correct |
6 |
Correct |
2 ms |
736 KB |
Output is correct |
7 |
Correct |
2 ms |
736 KB |
Output is correct |
8 |
Correct |
2 ms |
736 KB |
Output is correct |
9 |
Correct |
2 ms |
1184 KB |
Output is correct |
10 |
Correct |
2 ms |
1260 KB |
Output is correct |
11 |
Correct |
2 ms |
1260 KB |
Output is correct |
12 |
Correct |
3 ms |
1268 KB |
Output is correct |
13 |
Correct |
2 ms |
1292 KB |
Output is correct |
14 |
Correct |
2 ms |
1316 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
376 KB |
Output is correct |
2 |
Correct |
2 ms |
596 KB |
Output is correct |
3 |
Correct |
2 ms |
600 KB |
Output is correct |
4 |
Correct |
2 ms |
600 KB |
Output is correct |
5 |
Correct |
2 ms |
736 KB |
Output is correct |
6 |
Correct |
2 ms |
736 KB |
Output is correct |
7 |
Correct |
2 ms |
736 KB |
Output is correct |
8 |
Correct |
2 ms |
736 KB |
Output is correct |
9 |
Correct |
2 ms |
760 KB |
Output is correct |
10 |
Correct |
2 ms |
768 KB |
Output is correct |
11 |
Correct |
2 ms |
792 KB |
Output is correct |
12 |
Correct |
2 ms |
1184 KB |
Output is correct |
13 |
Correct |
2 ms |
1260 KB |
Output is correct |
14 |
Correct |
2 ms |
1260 KB |
Output is correct |
15 |
Correct |
3 ms |
1268 KB |
Output is correct |
16 |
Correct |
2 ms |
1292 KB |
Output is correct |
17 |
Correct |
2 ms |
1316 KB |
Output is correct |
18 |
Correct |
146 ms |
17332 KB |
Output is correct |
19 |
Correct |
148 ms |
26020 KB |
Output is correct |
20 |
Correct |
142 ms |
34176 KB |
Output is correct |
21 |
Correct |
155 ms |
42680 KB |
Output is correct |
22 |
Correct |
166 ms |
51128 KB |
Output is correct |
23 |
Correct |
154 ms |
59684 KB |
Output is correct |
24 |
Correct |
155 ms |
68608 KB |
Output is correct |