結果
問題 | No.2509 Beam Shateki |
ユーザー | shobonvip |
提出日時 | 2023-10-20 21:58:31 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 5 ms / 2,000 ms |
コード長 | 3,033 bytes |
コンパイル時間 | 3,961 ms |
コンパイル使用メモリ | 264,196 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-20 18:49:31 |
合計ジャッジ時間 | 5,377 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 61 |
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 < h) 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-k][k]; } chmax(ans, na1[x] + na2[y] - del); } } cout << ans << '\n'; }