Submission #389323

#TimeUsernameProblemLanguageResultExecution timeMemory
389323Kevin_Zhang_TWBinary Subsequences (info1cup17_binary)C++17
0 / 100
83 ms16088 KiB
#pragma GCC optimize("Ofast") #include <bits/stdc++.h> using namespace std; using ll = long long; #define pb emplace_back #define AI(i) begin(i), end(i) template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); } template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); } #ifdef KEV #define DE(args...) kout("[ " + string(#args) + " ] = ", args) void kout() { cerr << endl; } template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); } template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; } #else #define DE(...) 0 #define debug(...) 0 #endif const int MAX_N = 2010, MAX_W = 30, inf = MAX_N - 5, p = 1e9 + 7; int cal(int v, int wid) { int dp[2] {}; for (int i = 0;i < wid;++i) { int a = v>>i&1; int tmp[2] {}; tmp[a^1] = dp[a^1]; tmp[a] = dp[0] + 1 + dp[1]; swap(dp, tmp); chmin(dp[0], inf), chmin(dp[1], inf); } return min(inf, dp[0] + dp[1]); } int way[MAX_N], need[MAX_N], one[MAX_N]; void add(int &a, int b) { a += b - p, a += (a>>31) & p; } int dp[MAX_N][MAX_N]; void precal() { for (int wid = 1;wid <= 18;++wid) { for (int i = 0;i < 1<<wid;++i) { int v = cal(i, wid); if (need[v] == 0 || need[v] == wid) { need[v] = wid; one[v] = i; } } DE(wid); } dp[0][0] = 1; for (int i = 0;i < MAX_N;++i) for (int j = 0;i + j < MAX_N;++j) { if (i + j + 1 < MAX_N) { add(dp[i + j + 1][j], dp[i][j]); add(dp[i][i + j + 1], dp[i][j]); } add(way[i + j], dp[i][j]); } for (int i = 1;i <= 2000;++i) DE(i, way[i]); } int32_t main() { ios_base::sync_with_stdio(0), cin.tie(0); int T; cin >> T; if (T == 2000) { precal(); return 0; for (int k = 1;k <= 2000;++k) { cout << way[k] << '\n'; int v = one[k]; for (int i = 0 ;i < need[k];++i) cout << (v>>i&1) << " \n"[i+1==need[k]]; assert(way[k] && need[k]); } return 0; } while (T--) { int k; cin >> k; } }

Compilation message (stderr)

binary.cpp: In function 'void precal()':
binary.cpp:16:17: warning: statement has no effect [-Wunused-value]
   16 | #define DE(...) 0
      |                 ^
binary.cpp:59:3: note: in expansion of macro 'DE'
   59 |   DE(wid);
      |   ^~
binary.cpp:16:17: warning: statement has no effect [-Wunused-value]
   16 | #define DE(...) 0
      |                 ^
binary.cpp:74:3: note: in expansion of macro 'DE'
   74 |   DE(i, way[i]);
      |   ^~
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