Submission #495045

#TimeUsernameProblemLanguageResultExecution timeMemory
495045ZielChessboard (IZhO18_chessboard)C++17
39 / 100
87 ms6312 KiB
/** * LES GREATEABLES BRO TEAM **/ #include <bits/stdc++.h> using namespace std; using ll = long long; #define sz(x) (int)x.size() const bool FLAG = false; void setIO(const string &f = ""); string to_string(const string s) { return '"' + s + '"'; } string to_string(const char c) { return char(39) + string(1, c) + char(39); } string to_string(const char* s) { return to_string(string(s)); } string to_string(bool f) { return (f ? "true" : "false"); } template<class A, class B> string to_string(const pair<A, B> x) { return "(" + to_string(x.first) + ", " + to_string(x.second) + ")"; } template<class A, class B, class C> string to_string(const tuple<A, B, C> x) { return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ")"; } template<class A, class B, class C, class D> string to_string(const tuple<A, B, C, D> x) { return "(" + to_string(get<0>(x)) + ", " + to_string(get<1>(x)) + ", " + to_string(get<2>(x)) + ", " + to_string(get<3>(x)) + ")"; } template<class T> string to_string(const T v) { string res = "{"; bool f = true; for (auto x: v) res += (f ? to_string(x) : ", " + to_string(x)), f = false; return res + "}"; } void debug_args() { cerr << "]\n"; } template<class H, class... T> void debug_args(H x, T... y) { cerr << to_string(x); if (sizeof... (y)) cerr << ", "; debug_args(y...); } #ifdef LOCAL #define debug(...) cerr << "[" << #__VA_ARGS__ << "]: [", debug_args(__VA_ARGS__); #else #define debug(...) 47 #endif void solve() { int n, k; cin >> n >> k; vector<int> up(k + 1), left(k + 1), down(k + 1), right(k + 1); bool flag = 1; vector<vector<int>> a(1020, vector<int>(1020)); for (int i = 1; i <= k; i++) { cin >> up[i] >> left[i] >> down[i] >> right[i]; if (up[i] != down[i] || left[i] != right[i]) flag = 0; if (n <= 1000) { for (int ii = up[i]; ii <= down[i]; ii++) for (int jj = left[i]; jj <= right[i]; jj++) a[ii][jj] = 1; } } if (n <= 1000) { int ans = n * n * 3; for (int len = 1; len * len <= n; len++) { if (n % len == 0) { int turn = 0, cur = 0, st_turn = 0; for (int i = 1; i <= n; i += len) { turn = st_turn; st_turn ^= 1; for (int j = 1; j <= n; j += len) { for (int ii = i; ii < i + len; ii++) { for (int jj = j; jj < j + len; jj++) { if (a[ii][jj] != turn) cur++; } } turn ^= 1; } } ans = min(ans, cur); cur = 0, st_turn = 1; for (int i = 1; i <= n; i += len) { turn = st_turn; st_turn ^= 1; for (int j = 1; j <= n; j += len) { for (int ii = i; ii < i + len; ii++) { for (int jj = j; jj < j + len; jj++) { if (a[ii][jj] != turn) cur++; } } turn ^= 1; } } ans = min(ans, cur); if (len != 1) { int len2 = n / len; st_turn = 0, cur = 0; for (int i = 1; i <= n; i += len2) { turn = st_turn; st_turn ^= 1; for (int j = 1; j <= n; j += len2) { for (int ii = i; ii < i + len2; ii++) { for (int jj = j; jj < j + len2; jj++) { if (a[ii][jj] != turn) cur++; } } turn ^= 1; } } ans = min(ans, cur); cur = 0, st_turn = 1; for (int i = 1; i <= n; i += len2) { turn = st_turn; st_turn ^= 1; for (int j = 1; j <= n; j += len2) { for (int ii = i; ii < i + len2; ii++) { for (int jj = j; jj < j + len2; jj++) { if (a[ii][jj] != turn) cur++; } } turn ^= 1; } } ans = min(ans, cur); } } } cout << ans; } /* else if (flag) { for (int i = 1; i <= k; i++) { a[up[i]][left[i]] = 1; } }*/ } signed main() { setIO(); int tt = 1; if (FLAG) { cin >> tt; } while (tt--) { solve(); } return 0; } void setIO(const string &f) { ios_base::sync_with_stdio(false); cin.tie(nullptr); if (fopen((f + ".in").c_str(), "r")) { freopen((f + ".in").c_str(), "r", stdin); freopen((f + ".out").c_str(), "w", stdout); } }

Compilation message (stderr)

chessboard.cpp: In function 'void solve()':
chessboard.cpp:64:10: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
   64 |     bool flag = 1;
      |          ^~~~
chessboard.cpp: In function 'void setIO(const string&)':
chessboard.cpp:179:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  179 |         freopen((f + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chessboard.cpp:180:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  180 |         freopen((f + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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