제출 #757087

#제출 시각아이디문제언어결과실행 시간메모리
757087maomao90Worm Worries (BOI18_worm)C++17
81 / 100
994 ms232764 KiB
// Hallelujah, praise the one who set me free // Hallelujah, death has lost its grip on me // You have broken every chain, There's salvation in your name // Jesus Christ, my living hope #include <bits/stdc++.h> using namespace std; #define REP(i, s, e) for (int i = (s); i < (e); i++) #define RREP(i, s, e) for (int i = (s); i >= (e); i--) template <class T> inline bool mnto(T& a, T b) {return a > b ? a = b, 1 : 0;} template <class T> inline bool mxto(T& a, T b) {return a < b ? a = b, 1: 0;} typedef long long ll; typedef long double ld; #define FI first #define SE second typedef pair<int, int> ii; typedef pair<ll, ll> pll; typedef tuple<int, int, int> iii; #define ALL(_a) _a.begin(), _a.end() #define SZ(_a) (int) _a.size() #define pb push_back typedef vector<int> vi; typedef vector<ll> vll; typedef vector<ii> vii; typedef vector<iii> viii; #ifndef DEBUG #define cerr if (0) cerr #endif const int INF = 1000000005; const ll LINF = 1000000000000000005ll; const int MAXN = 1000005; int query(int x, int y, int z) { cout << "? " << x << ' ' << y << ' ' << z << endl; int ans; cin >> ans; if (ans == -1) exit(0); return ans; } void guess(int x, int y, int z) { cout << "! " << x << ' ' << y << ' ' << z << endl; exit(0); } int n, m, k, q; namespace st2 { const int MAXN = 1000005; int qry[MAXN]; int fib[MAXN]; int query(int x, int y, int z) { if (x > n) { return 0; } if (qry[x]) { return qry[x]; } cout << "? " << x << ' ' << y << ' ' << z << endl; int ans; cin >> ans; if (ans == -1) exit(0); return qry[x] = ans; } int main() { fib[0] = 1; fib[1] = 2; int gd = -1; REP (i, 2, 50) { fib[i] = fib[i - 1] + fib[i - 2]; if (fib[i] + 1 >= n) { gd = i; break; } } int lo = 1, hi = fib[gd] + 1; int ans = -1; RREP (k, gd, 2) { int mid1 = lo + fib[k - 2], mid2 = lo + fib[k - 1]; assert(hi == lo + fib[k]); cerr << ' ' << mid1 << ' ' << mid2 << '\n'; int l = query(mid1, 1, 1), r = query(mid2, 1, 1); if (l > r) { hi = mid2; } else { lo = mid1; } } assert(lo + 2 == hi); int l = query(lo, 1, 1), m = query(lo + 1, 1, 1), r = query(hi, 1, 1); if (l >= m) { guess(lo, 1, 1); } else if (m >= l && m >= r) { guess(lo + 1, 1, 1); } else { assert(r >= m); guess(hi, 1, 1); } /* int lo = 1, hi = n; while (lo < hi) { int mid = lo + hi + 1 >> 1; int l = query(mid - 1, 1, 1), m = query(mid, 1, 1); if (l < m) { lo = mid; } else { hi = mid - 1; } } guess(lo, 1, 1); */ return 0; } } namespace st4 { const int MAXN = 1005; int qry[MAXN][MAXN]; int query(int x, int y, int z = 1) { if (x > n || y > m) { return 0; } if (qry[x][y]) { return qry[x][y]; } cout << "? " << x << ' ' << y << ' ' << z << endl; int ans; cin >> ans; if (ans == -1) exit(0); return qry[x][y] = ans; } bool solve(int mnx, int mxx, int mny, int mxy, iii mx) { cerr << mnx << ' ' << mxx << ' ' << mny << ' ' << mxy << ' ' << get<0>(mx) << ' ' << get<1>(mx) << ' ' << get<2>(mx) << '\n'; if (mxx - mnx >= mxy - mny) { int mid = mnx + mxx >> 1; ii tmx = {-1, -1}; REP (i, mny, mxy + 1) { mxto(tmx, {query(mid, i), i}); } if (get<0>(mx) > tmx.FI) { if (get<1>(mx) <= mid) { return solve(mnx, mid - 1, mny, mxy, mx); } else { return solve(mid + 1, mxx, mny, mxy, mx); } } else { int up = query(mid + 1, tmx.SE), bt = query(mid - 1, tmx.SE); if (up > tmx.FI) { return solve(mid + 1, mxx, mny, mxy, {up, mid + 1, tmx.SE}); } else if (bt > tmx.FI) { return solve(mnx, mid - 1, mny, mxy, {bt, mid - 1, tmx.SE}); } else { guess(mid, tmx.SE, 1); return 1; } } } int mid = mny + mxy >> 1; ii tmx = {-1, -1}; REP (i, mnx, mxx + 1) { mxto(tmx, {query(i, mid), i}); } if (get<0>(mx) > tmx.FI) { if (get<2>(mx) <= mid) { return solve(mnx, mxx, mny, mid - 1, mx); } else { return solve(mnx, mxx, mid + 1, mxy, mx); } } else { int up = query(tmx.SE, mid + 1), bt = query(tmx.SE, mid - 1); if (up > tmx.FI) { return solve(mnx, mxx, mid + 1, mxy, {up, tmx.SE, mid + 1}); } else if (bt > tmx.FI) { return solve(mnx, mxx, mny, mid - 1, {bt, tmx.SE, mid - 1}); } else { guess(tmx.SE, mid, 1); return 1; } } } int main() { assert(solve(1, n, 1, m, {-1, -1, -1})); return 0; } } namespace st6 { const int MAXN = 505; const int dirx[] = {1, -1, 0, 0, 0, 0}, diry[] = {0, 0, 1, -1, 0, 0}, dirz[] = {0, 0, 0, 0, 1, -1}; mt19937 rnd(8); int qry[MAXN][MAXN][MAXN]; int query(int x, int y, int z) { if (x > n || y > m || z > k || x <= 0 || y <= 0 || z <= 0) { return 0; } if (qry[x][y][z]) { return qry[x][y][z]; } cout << "? " << x << ' ' << y << ' ' << z << endl; int ans; cin >> ans; if (ans == -1) exit(0); return qry[x][y][z] = ans; } int main() { int mx = -1, sx, sy, sz; REP (_, 0, q / 2) { int x = rnd() % n + 1, y = rnd() % m + 1, z = rnd() % k + 1; if (mxto(mx, query(x, y, z))) { sx = x; sy = y; sz = z; } } while (1) { bool fnd = 0; REP (d, 0, 6) { int nx = sx + dirx[d], ny = sy + diry[d], nz = sz + dirz[d]; int nmx = query(nx, ny, nz); if (nmx > mx) { fnd = 1; sx = nx, sy = ny, sz = nz; mx = nmx; break; } } if (!fnd) { guess(sx, sy, sz); return 0; } } assert(0); } } int main() { cin >> n >> m >> k >> q; if (m == 1 && k == 1) { st2::main(); } else if (k == 1) { st4::main(); } else { st6::main(); } }

컴파일 시 표준 에러 (stderr) 메시지

worm.cpp: In function 'int st2::main()':
worm.cpp:79:13: warning: unused variable 'ans' [-Wunused-variable]
   79 |         int ans = -1;
      |             ^~~
worm.cpp: In function 'bool st4::solve(int, int, int, int, iii)':
worm.cpp:136:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  136 |             int mid = mnx + mxx >> 1;
      |                       ~~~~^~~~~
worm.cpp:159:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  159 |         int mid = mny + mxy >> 1;
      |                   ~~~~^~~~~
worm.cpp: In function 'int st6::main()':
worm.cpp:226:22: warning: 'sz' may be used uninitialized in this function [-Wmaybe-uninitialized]
  226 |                 guess(sx, sy, sz);
      |                 ~~~~~^~~~~~~~~~~~
worm.cpp:226:22: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized]
worm.cpp:226:22: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized]
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...