結果
問題 | No.1028 闇討ち |
ユーザー | 👑 emthrm |
提出日時 | 2020-04-17 21:47:52 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 330 ms / 2,000 ms |
コード長 | 2,446 bytes |
コンパイル時間 | 3,390 ms |
コンパイル使用メモリ | 204,096 KB |
最終ジャッジ日時 | 2025-01-09 19:54:26 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 20 |
ソースコード
#define _USE_MATH_DEFINES #include <bits/stdc++.h> using namespace std; #define FOR(i,m,n) for(int i=(m);i<(n);++i) #define REP(i,n) FOR(i,0,n) #define ALL(v) (v).begin(),(v).end() using ll = long long; const int INF = 0x3f3f3f3f; const ll LINF = 0x3f3f3f3f3f3f3f3fLL; const double EPS = 1e-8; const int MOD = 1000000007; // const int MOD = 998244353; const int dy[] = {1, 0, -1, 0}, dx[] = {0, -1, 0, 1}; const int dy8[] = {1, 1, 0, -1, -1, -1, 0, 1}, dx8[] = {0, -1, -1, -1, 0, 1, 1, 1}; template <typename T, typename U> inline bool chmax(T &a, U b) { return a < b ? (a = b, true) : false; } template <typename T, typename U> inline bool chmin(T &a, U b) { return a > b ? (a = b, true) : false; } struct IOSetup { IOSetup() { cin.tie(nullptr); ios_base::sync_with_stdio(false); cout << fixed << setprecision(20); } } iosetup; template <typename Abelian> struct BITRangeAdd { BITRangeAdd(int n_, const Abelian UNITY = 0) : n(n_), UNITY(UNITY) { ++n; dat_const.assign(n, UNITY); dat_linear.assign(n, UNITY); } void add(int left, int right, Abelian val) { if (right < ++left) return; for (int i = left; i < n; i += i & -i) { dat_const[i] -= val * (left - 1); dat_linear[i] += val; } for (int i = right + 1; i < n; i += i & -i) { dat_const[i] += val * right; dat_linear[i] -= val; } } Abelian sum(int idx) { Abelian res = UNITY; for (int i = idx; i > 0; i -= i & -i) res += dat_linear[i]; res *= idx; for (int i = idx; i > 0; i -= i & -i) res += dat_const[i]; return res; } Abelian sum(int left, int right) { if (right <= left) return UNITY; return sum(right) - sum(left); } Abelian operator[](const int idx) { return sum(idx, idx + 1); } private: int n; const Abelian UNITY; vector<Abelian> dat_const, dat_linear; }; int main() { int n; cin >> n; vector<vector<int>> a(n, vector<int>(n)); REP(i, n) REP(j, n) cin >> a[i][j], --a[i][j]; vector<BITRangeAdd<ll>> bit(n, n); REP(i, n) REP(j, n) { int l = max(i - j, 0), r = min(i + j, n - 1); bit[a[i][j]].add(0, 1, j + l); bit[a[i][j]].add(1, l + 1, -1); bit[a[i][j]].add(r + 1, n, 1); } ll ans = 0; REP(i, n) { vector<ll> now(n); REP(j, n) now[j] = bit[i][j]; FOR(j, 1, n) now[j] += now[j - 1]; // REP(j, n) cout << now[j] << " \n"[j + 1 == n]; ans += *min_element(ALL(now)); } cout << ans << '\n'; return 0; }