제출 #647667

#제출 시각아이디문제언어결과실행 시간메모리
647667ghostwriterMecho (IOI09_mecho)C++14
100 / 100
590 ms21856 KiB
#include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include <debug.h> #else #define debug(...) #endif #define ft front #define bk back #define st first #define nd second #define ins insert #define ers erase #define pb push_back #define pf push_front #define _pb pop_back #define _pf pop_front #define lb lower_bound #define ub upper_bound #define mtp make_tuple #define bg begin #define ed end #define all(x) (x).bg(), (x).ed() #define sz(x) (int)(x).size() #define int long long typedef long long ll; typedef unsigned long long ull; typedef double db; typedef long double ldb; typedef pair<int, int> pi; typedef pair<ll, ll> pll; typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll; typedef string str; template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); } template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; } #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i)) #define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i)) #define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i)) #define FSN(i, n) for (int (i) = (n) - 1; (i) >= 0; --(i)) #define EACH(i, x) for (auto &(i) : (x)) #define WHILE while #define file "TEST" mt19937 rd(chrono::steady_clock::now().time_since_epoch().count()); ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); } /* ---------------------------------------------------------------- END OF TEMPLATE ---------------------------------------------------------------- Tran The Bao - ghostwriter Training for VOI23 gold medal ---------------------------------------------------------------- DIT ME CHUYEN BAO LOC ---------------------------------------------------------------- */ const int N = 801; const vpi dxy = {{0, -1}, {0, 1}, {-1, 0}, {1, 0}}; int n, s, d[N][N], d1[N][N]; char a[N][N], a1[N][N]; bool check(int tm) { FOR(i, 1, n) FOR(j, 1, n) a1[i][j] = a[i][j]; vpi index; pi home; FOR(i, 1, n) FOR(j, 1, n) if (a[i][j] == 'H') index.pb({i, j}); FOR(i, 1, tm) { vpi index1; EACH(j, index) { int x = j.st, y = j.nd; EACH(z, dxy) { int x1 = x + z.st, y1 = y + z.nd; if (x1 < 1 || x1 > n || y1 < 1 || y1 > n) continue; if (a1[x1][y1] != 'H' && a1[x1][y1] != 'D' && a1[x1][y1] != 'T') { a1[x1][y1] = 'H'; index1.pb({x1, y1}); } } } swap(index, index1); } pi ph = {0, 0}, ps = {0, 0}; FOR(i, 1, n) FOR(j, 1, n) if (a1[i][j] == 'D') ph = {i, j}; else if (a1[i][j] == 'M') ps = {i, j}; if (!ph.st || !ps.st) return 0; memset(d, -1, sizeof d); queue<pi> q; FOR(i, 1, n) FOR(j, 1, n) if (a1[i][j] == 'H') { d[i][j] = 0; q.push({i, j}); } WHILE(!q.empty()) { int x = q.ft().st, y = q.ft().nd; q.pop(); EACH(i, dxy) { int x1 = x + i.st, y1 = y + i.nd; if (x1 < 1 || x1 > n || y1 < 1 || y1 > n || a1[x1][y1] == 'T' || a1[x1][y1] == 'D' || d[x1][y1] != -1) continue; d[x1][y1] = d[x][y] + 1; q.push({x1, y1}); } } memset(d1, -1, sizeof d1); d1[ps.st][ps.nd] = 0; q.push(ps); WHILE(!q.empty()) { int x = q.ft().st, y = q.ft().nd; q.pop(); EACH(i, dxy) { int x1 = x + i.st, y1 = y + i.nd; if (x1 < 1 || x1 > n || y1 < 1 || y1 > n || a1[x1][y1] == 'T' || d1[x1][y1] != -1 || (d[x1][y1] != -1 && (d1[x][y] + 1) / s >= d[x1][y1])) continue; d1[x1][y1] = d1[x][y] + 1; q.push({x1, y1}); } } return d1[ph.st][ph.nd] != -1? 1 : 0; } signed main() { ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0); // freopen(file".inp", "r", stdin); // freopen(file".out", "w", stdout); cin >> n >> s; FOR(i, 1, n) FOR(j, 1, n) cin >> a[i][j]; int l = 0, r = n * n, ans = -1; WHILE(l <= r) { int mid = l + (r - l) / 2; if (check(mid)) { ans = mid; l = mid + 1; } else r = mid - 1; } cout << ans; return 0; } /* 7 3 TTTTTTT TGGGGGT TGGGGGT MGGGGGD TGGGGGT TGGGGGT THHHHHT ---------------------------------------------------------------- From Benq: stuff you should look for * int overflow, array bounds * special cases (n=1?) * do smth instead of nothing and stay organized * WRITE STUFF DOWN * DON'T GET STUCK ON ONE APPROACH ---------------------------------------------------------------- */

컴파일 시 표준 에러 (stderr) 메시지

mecho.cpp: In function 'bool check(long long int)':
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:57:5: note: in expansion of macro 'FOR'
   57 |     FOR(i, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:58:5: note: in expansion of macro 'FOR'
   58 |     FOR(j, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:62:5: note: in expansion of macro 'FOR'
   62 |     FOR(i, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:63:5: note: in expansion of macro 'FOR'
   63 |     FOR(j, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:66:5: note: in expansion of macro 'FOR'
   66 |     FOR(i, 1, tm) {
      |     ^~~
mecho.cpp:37:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   37 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
mecho.cpp:68:9: note: in expansion of macro 'EACH'
   68 |         EACH(j, index) {
      |         ^~~~
mecho.cpp:37:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   37 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
mecho.cpp:70:13: note: in expansion of macro 'EACH'
   70 |             EACH(z, dxy) {
      |             ^~~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:82:5: note: in expansion of macro 'FOR'
   82 |     FOR(i, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:83:5: note: in expansion of macro 'FOR'
   83 |     FOR(j, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:89:5: note: in expansion of macro 'FOR'
   89 |     FOR(i, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:90:5: note: in expansion of macro 'FOR'
   90 |     FOR(j, 1, n)
      |     ^~~
mecho.cpp:37:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   37 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
mecho.cpp:98:9: note: in expansion of macro 'EACH'
   98 |         EACH(i, dxy) {
      |         ^~~~
mecho.cpp:37:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   37 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
mecho.cpp:111:9: note: in expansion of macro 'EACH'
  111 |         EACH(i, dxy) {
      |         ^~~~
mecho.cpp: In function 'int main()':
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:125:5: note: in expansion of macro 'FOR'
  125 |     FOR(i, 1, n)
      |     ^~~
mecho.cpp:33:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   33 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
mecho.cpp:126:5: note: in expansion of macro 'FOR'
  126 |     FOR(j, 1, n)
      |     ^~~
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