Submission #46226

#TimeUsernameProblemLanguageResultExecution timeMemory
46226grumpy_gordonMaxcomp (info1cup18_maxcomp)C++17
100 / 100
166 ms68608 KiB
/* .:*+=%@@@@@@=-. .:=@#@@@#@@#######%==*. .-=####@######%*-.....:%##%. .*@###########%+:--........-%@- .*@##############@+--.........-:%- .+##################@==%%%%=+*:----+. .-@####################%++%@@@@@=+**%@@* .%###################@%%@@@###@%+:--%@@%. -@###################@%%%%*::*%++:-----=@+. -#####################@%=++++++*:-------.-=: .+####################@%++*::-:::--::*:::***=: .@#####################%=++*::::-:::++*=##@@#@- ..#####################@%%=++**:::::**+%@#@%%##-.. .%####################@@%=+++*+****::*=@######@. .=######################@%%==+==++**+=@%@##@###+:... -#######################@@@%%%===++=@@@%=++===*::--... -########################@@@@@@@%==%%=++==@@:::::*:--. ..:#########################@@@@@@%%======++++::-..:-.--... %#############################@###@%%@@%==%=%*----.--.::---. #############################################*-:*:-:---*---- . #############################################*--*--:---*---:-. #############################################+--::--::-*::-::. ###########################################+:*-.---.---.:---*-.. ###########################################**:-----------------. ##########################################@::**:--::::::--:::::- ###########################################:--:*:::::::::**::*+* ###########################################=:::***::::::**:::*+* ############################@@@@@@#########@+****::::********+++ ############################@%%%%%@@@@@@@###%+***::::::::***+==+ ############################@%%%%%%%%%%%@####=+:::-::::-::*+=%%+ #############################@%%%%%%%%%%@#####=::--------:*=%@%+ %###########################@%%%%==%%%%%%@##@#=:------..-:+%@@%= ---------------------------------------------- -------------------------------------------- ---------------------------------------------- -------------------------------------------- ---------------------------------------------- o###########oo o##" ""##o o#" "## o#" "#o #" ## ## "## #" ## # ################### # # # # # # # # # # # # # #o # "#o ## "#o ## "#o o#" "#o ## "#o o#" "#ooo ooo#######oo ############### "######o o###"" "###o # ### o###o oooo ### oo####" o###**# #**# ############" ""##""""""""""########### # # oooooooo#"#** ## # # # # # ** ## # #o# #o# *****###ooo# ## ## o###o ## o##***## o########## #***#**##o o##" ""### #***##***# o#######o ### oo#### ##**####*# o##" ""#############"" ##****### ##" ## ##*##*### ## ### ##### ## ## ### # ## # ## ## # ## ## ## ### ## ###oo ### ""### ### ### */ #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; }
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