結果
| 問題 |
No.2509 Beam Shateki
|
| コンテスト | |
| ユーザー |
shobonvip
|
| 提出日時 | 2023-10-20 21:56:43 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
RE
|
| 実行時間 | - |
| コード長 | 3,053 bytes |
| コンパイル時間 | 4,152 ms |
| コンパイル使用メモリ | 254,608 KB |
| 最終ジャッジ日時 | 2025-02-17 09:22:20 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 46 RE * 15 |
ソースコード
#include<bits/stdc++.h>
using namespace std;
//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/
/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/
typedef long long ll;
#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)
template <typename T> bool chmin(T &a, const T &b) {
if (a <= b) return false;
a = b;
return true;
}
template <typename T> bool chmax(T &a, const T &b) {
if (a >= b) return false;
a = b;
return true;
}
template <typename T> T max(vector<T> &a){
assert(!a.empty());
T ret = a[0];
for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
return ret;
}
template <typename T> T min(vector<T> &a){
assert(!a.empty());
T ret = a[0];
for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
return ret;
}
template <typename T> T sum(vector<T> &a){
T ret = 0;
for (int i=0; i<(int)a.size(); i++) ret += a[i];
return ret;
}
int main(){
int h, w; cin >> h >> w;
vector a(h, vector<int>(w));
rep(i,0,h){
rep(j,0,w){
cin >> a[i][j];
}
}
vector<int> tat(w);
vector<int> yok(h);
vector<int> na1(h+w-1);
vector<int> na2(h+w-1);
rep(i,0,w){
rep(j,0,h){
tat[i] += a[j][i];
}
}
rep(i,0,h){
rep(j,0,w){
yok[i] += a[i][j];
}
}
rep(i,0,h+w-1){
rep(j,0,w){
if (i-j >= 0 && i-j < h && j >= 0 && j < w){
na1[i] += a[i-j][j];
}
}
}
rep(i,0,h+w-1){
rep(j,0,w){
if (h-1-i+j >= 0 && h-1-i+j < h && j >= 0 && j < w){
na2[i] += a[h-1-i+j][j];
}
}
}
int ans = 0;
rep(x,0,h){
rep(y,x+1,h){
chmax(ans, yok[x] + yok[y]);
}
}
rep(x,0,w){
rep(y,x+1,w){
chmax(ans, tat[x] + tat[y]);
}
}
rep(x,0,h+w-1){
rep(y,x+1,h+w-1){
chmax(ans, na1[x] + na1[y]);
}
}
rep(x,0,h+w-1){
rep(y,x+1,h+w-1){
chmax(ans, na2[x] + na2[y]);
}
}
rep(x,0,h){
rep(y,0,w){
chmax(ans, yok[x] + tat[y] - a[x][y]);
}
}
rep(x,0,h){
rep(y,0,h+w-1){
int del = 0;
// (y-j, j)
// (x, y-x)
if (0 <= y-x && y-x < w) del = a[x][y-x];
chmax(ans, yok[x] + na1[y] - del);
}
rep(y,0,h+w-1){
int del = 0;
// (h-1-y+j, j)
// (x, x+y+1-h)
// h-1-y+j = x
// j = x+y+1-h
if (0 <= x+y+1-h && x+y+1-h < w) del = a[x][x+y+1-h];
chmax(ans, yok[x] + na2[y] - del);
}
}
rep(x,0,w){
rep(y,0,h+w-1){
int del = 0;
// (y-j, j)
// (y-x, x)
if (0 <= y-x && y-x < h) del = a[y-x][x];
chmax(ans, tat[x] + na1[y] - del);
}
rep(y,0,h+w-1){
int del = 0;
// (h-1-y+j, j)
// (h-1-y+x, x)
if (0 <= h-1-y+x && h-1-y+x < w) del = a[h-1-y+x][x];
chmax(ans, tat[x] + na2[y] - del);
}
}
rep(x,0,h+w-1){
rep(y,0,h+w-1){
int del = 0;
// (x-j, j)
// (h-1-y+k, k)
// x-k = h-1-y+k
// 2k = x+y+1-h
int k = (x+y+1-h)/2;
if ((x+y+1-h)%2 == 0 && 0 <= x-k && x-k < h && 0 <= k && k < w){
del = a[x-(x+y+1-h)/2][(x+y+1-h)/2];
}
chmax(ans, na1[x] + na2[y] - del);
}
}
cout << ans << '\n';
}
shobonvip