QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#297427 | #4859. Poker Game: Construction | ucup-team087# | TL | 6ms | 3744kb | C++14 | 8.5kb | 2024-01-04 14:03:42 | 2024-01-04 14:03:43 |
Judging History
answer
#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <limits>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using Int = long long;
template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
#define COLOR(s) ("\x1b[" s "m")
int bsr(int a) {
return 31 - __builtin_clz(a);
}
// Returns the submask containing highest k bits set.
// Returns -1 instead if popcnt(a) < k.
int highBits(int a, int k) {
int b = 0;
for (int i = 0; i < k; ++i) {
if (!a) return -1;
b |= 1 << (31 - __builtin_clz(a));
a &= ~b;
}
return b;
}
constexpr char RANKS_STR[16] = "0123456789TJQKA";
constexpr char SUITS_STR[5] = "CDHS";
enum Poker {
HIGH_CARD,
ONE_PAIR,
TWO_PAIR,
THREE_OF_A_KIND,
STRAIGHT,
FLUSH,
FULL_HOUSE,
FOUR_OF_A_KIND,
STRAIGHT_FLUSH,
};
constexpr char POKER_STR[9][20] = {
"HIGH_CARD",
"ONE_PAIR",
"TWO_PAIR",
"THREE_OF_A_KIND",
"STRAIGHT",
"FLUSH",
"FULL_HOUSE",
"FOUR_OF_A_KIND",
"STRAIGHT_FLUSH",
};
// Parses a card in a format as "2C" or "C2".
// Returns card = 4 (rank - 2) + suit (2 <= rank <= 14)
int parseCard(const char *str) {
int r, s;
for (s = 0; s < 4; ++s) if (SUITS_STR[s] == str[1]) break;
if (s < 4) {
// "2C"
for (r = 2; r < 15; ++r) if (RANKS_STR[r] == str[0]) break;
assert(r < 15);
} else {
// "C2"
for (s = 0; s < 4; ++s) if (SUITS_STR[s] == str[0]) break;
assert(s < 4);
for (r = 2; r < 15; ++r) if (RANKS_STR[r] == str[1]) break;
assert(r < 15);
}
return (r - 2) << 2 | s;
}
// Read a card from standard input.
int readCard() {
static char buf[3];
scanf("%s", buf);
return parseCard(buf);
}
// Transforms a card in a format as "2C" (or "C2" if rev).
string cardString(int card, bool rev = false) {
const int r = card / 4 + 2, s = card % 4;
return rev ? (string() + SUITS_STR[s] + RANKS_STR[r]) : (string() + RANKS_STR[r] + SUITS_STR[s]);
}
// Returns the best poker hand with the tie-breaker in [0, 2^20).
// cards must be distinct.
pair<Poker, int> poker(const vector<int> &cards) {
assert(cards.size() >= 5);
// a: ranks for all, bs[suit]: ranks, cs[rank]: count, ds[count]: ranks
int a = 0, bs[4] = {}, cs[15] = {}, ds[5] = {};
for (const int card : cards) { const int r = (card >> 2) + 2, s = card & 3; a |= bs[s] |= 1 << r; ++cs[r]; }
for (int r = 2; r < 15; ++r) ds[cs[r]] |= 1 << r;
// 8. STRAIGHT_FLUSH: highest (5 for A2345)
{
int straightFlush = 0;
for (int s = 0; s < 4; ++s) straightFlush |= bs[s] & bs[s] << 1 & bs[s] << 2 & bs[s] << 3 & (bs[s] << 4 | bs[s] >> 14 << 5);
if (straightFlush) return make_pair(STRAIGHT_FLUSH, bsr(straightFlush));
}
// 7. FOUR_OF_A_KIND: quadruple, other card
if (ds[4]) {
const int r4 = bsr(ds[4]);
return make_pair(FOUR_OF_A_KIND, r4 << 4 | bsr(a ^ 1 << r4));
}
// 6. FULL_HOUSE: triple, pair
if (ds[3]) {
const int r3 = bsr(ds[3]);
const int d = (ds[3] ^ 1 << r3) | ds[2];
if (d) {
const int r2 = bsr(d);
return make_pair(FULL_HOUSE, r3 << 4 | r2);
}
}
// 5. FLUSH: 5 highest cards
{
int flush = -1;
for (int s = 0; s < 4; ++s) { const int h = highBits(bs[s], 5); if (flush < h) flush = h; }
if (flush >= 0) return make_pair(FLUSH, flush);
}
// 4. STRAIGHT: highest (5 for A2345)
{
const int straight = a & a << 1 & a << 2 & a << 3 & (a << 4 | a >> 14 << 5);
if (straight) return make_pair(STRAIGHT, bsr(straight));
}
// 3. THREE_OF_A_KIND: triple, 2 highest other cards
if (ds[3]) {
const int r3 = bsr(ds[3]);
return make_pair(THREE_OF_A_KIND, r3 << 16 | highBits(a ^ 1 << r3, 2));
}
// 2. TWO_PAIR: larger pair, smaller pair, other card
// 1. ONE_PAIR: pair, 3 highest other cards
if (ds[2]) {
const int r2 = bsr(ds[2]);
const int d = ds[2] ^ 1 << r2;
if (d) {
const int r22 = bsr(d);
return make_pair(TWO_PAIR, r2 << 8 | r22 << 4 | bsr(a ^ 1 << r2 ^ 1 << r22));
}
return make_pair(ONE_PAIR, r2 << 16 | highBits(a ^ 1 << r2, 3));
}
// 0. HIGH_CARD: 5 highest cards
return make_pair(HIGH_CARD, highBits(a, 5));
}
////////////////////////////////////////////////////////////////////////////////
int simulate(int A0, int A1, int B0, int B1, const vector<int> &C) {
constexpr int THREE[6 + 1] = {1, 3, 9, 27, 81, 243, 729};
assert(C.size() == 6);
vector<int> dp(THREE[6], 2);
for (int p = THREE[6]; --p >= 0; ) {
vector<int> xs(6);
for (int i = 0; i < 6; ++i) xs[i] = p / THREE[i] % 3;
int cnt[3] = {};
for (int i = 0; i < 6; ++i) ++cnt[xs[i]];
if (cnt[1] == 3 && cnt[2] == 3) {
vector<int> as{A0, A1}, bs{B0, B1};
for (int i = 0; i < 6; ++i) ((xs[i] == 1) ? as : bs).push_back(C[i]);
const auto resA = poker(as);
const auto resB = poker(bs);
dp[p] = (resA > resB) ? +1 : (resA < resB) ? -1 : 0;
} else if (cnt[1] == cnt[2]) {
// A
dp[p] = -1;
for (int i = 0; i < 6; ++i) if (!xs[i]) chmax(dp[p], dp[p + THREE[i]]);
} else if (cnt[1] == cnt[2] + 1) {
// B
dp[p] = +1;
for (int i = 0; i < 6; ++i) if (!xs[i]) chmin(dp[p], dp[p + 2 * THREE[i]]);
}
}
return dp[0];
}
void solve(int A0, int A1, int B0, int B1) {
// cerr<<COLOR("33")<<"[solve] "<<cardString(A0)<<" "<<cardString(A1)<<" "<<cardString(B0)<<" "<<cardString(B1)<<COLOR()<<endl;
constexpr int NUM_ITERS = 1000;
vector<int> ans[3];
for (int phase = 0; phase < 3; ++phase) {
for (int iter = 0; iter < NUM_ITERS; ++iter) {
if (phase == 0 && ans[1 + (+1)].size()) break;
if (phase == 1 && ans[1 + (-1)].size()) break;
if (phase == 2 && ans[1 + 0 ].size()) break;
const int seed = phase * NUM_ITERS + iter;
mt19937_64 rng(seed);
vector<int> C(6);
if (phase == 0) {
// random
for (int i = 0; i < 6; ++i) {
C[i] = rng() % 52;
}
} else if (phase == 1) {
// in favor of Bob
for (int i = 0; i < 6; ++i) {
C[i] = (rng() & 1)
? (((rng() & 1) ? B1 : B0) ^ (rng() & 3))
: (rng() % 52);
}
} else if (phase == 2) {
// in favor of draw
int cnt[13] = {};
++cnt[A0 >> 2];
++cnt[A1 >> 2];
--cnt[B0 >> 2];
--cnt[B1 >> 2];
C.clear();
for (int r = 0; r < 13; ++r) {
for (int i = abs(cnt[r]); --i >= 0; ) {
C.push_back(r << 2 | (rng() & 3));
}
}
for (; C.size() < 6; ) {
const int r = rng() % 13;
C.push_back(r << 2 | (rng() & 3));
C.push_back(r << 2 | (rng() & 3));
}
assert((int)C.size() == 6);
} else {
break;
}
set<int> ss{A0, A1, B0, B1};
ss.insert(C.begin(), C.end());
if (ss.size() == 10) {
const int res = simulate(A0, A1, B0, B1, C);
// cerr << res << " " << C << endl;
ans[1 + res] = C;
}
}
}
for (const int z : {+1, -1, 0}) {
if (ans[1 + z].size()) {
printf("YES");
for (const int c : ans[1 + z]) {
printf(" %s", cardString(c).c_str());
}
puts("");
} else {
puts("NO");
}
}
}
int main() {
for (int numCases; ~scanf("%d", &numCases); ) { for (int caseId = 1; caseId <= numCases; ++caseId) {
const int A0 = readCard();
const int A1 = readCard();
const int B0 = readCard();
const int B1 = readCard();
solve(A0, A1, B0, B1);
}
#ifndef LOCAL
break;
#endif
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3744kb
input:
3 JC 4H TS 5D 7C 3C 7H TH 2D KH 4D JC
output:
YES 4S 5C TD JH KD KS YES 9H 6S AD 6H 2C TH YES 4C 5C TH JD TC TD YES JD 4C 8H AC 8S 2D YES AS AD 4D 6D KC TC YES 3H TD TC TS KD KS YES 2H 4H JS KC 6H 6C YES JS 4S 6D 6H QH 7H YES 2S 4S JD KS 4H 4C
result:
ok 3 test cases (3 test cases)
Test #2:
score: 0
Accepted
time: 6ms
memory: 3740kb
input:
2 AS AH AC AD AS AH 2S 2H
output:
YES TD 9H 3D 4D KS 7C NO YES QD QS 3C 3S 4D 4S YES 2C 2D AC AD 8C 8H YES 2C QS 2D 8C 4S TC NO
result:
ok 2 test cases (2 test cases)
Test #3:
score: 0
Accepted
time: 1ms
memory: 3688kb
input:
1 3C 3D 3H 5S
output:
YES 3S 5C QH QD 9D 9C YES QD KS 5D AS 5C TS YES 3S 5D 6S 6H 5H 5C
result:
ok 1 test cases (1 test case)
Test #4:
score: 0
Accepted
time: 0ms
memory: 3704kb
input:
1 9C KC JC 5D
output:
YES 5H 9D JD KD 2C 2H YES 5H JH 6D 6H QH 7H YES 5H 9H JH KH 5S 5C
result:
ok 1 test cases (1 test case)
Test #5:
score: -100
Time Limit Exceeded
input:
100000 6S 7C KH 3S 5S 2D AC TS QD 6H TC JD 5C AD 4S TH AD 3S JC 5S TH QH 9S JH AD JC JS 7H 3S 9S JC 6S 4D 7S 3S JH AD JS 7D 4D 7D QS QH JC 4H JS 7H TS 5D AD 3S 8D AC TH 5D 3S 9H TD TS 7D 7D 8C AD 5H 7C QS 2C TH QD AS 4S 2H 8D JS 9S 5H 2C TC 2D 5S TD 2C AS 2D 6H 6S AC 2S 2C 8D 4C KS JD 9D 2D AD AS QH...
output:
YES 3D 6C 7S KD JS JH YES 3H 6H 7S KS 3C 3D NO YES 2S 5D TD AD 2H 2C YES 2C 5H TC AH 9D 9H NO YES 6C TD JH QC 9C 9S YES 9C JS 2D TS JC 8H YES 6D TD JS QC JH JC YES 4H 5D TS AS KS KC YES 9C TC 2D 4C TS 8H YES 4C 5H TD AH 4H 4D YES 3C 5H JS AH 9H 9S YES 9C 5D 2D JS 5H 8H YES 3H 5D JS AC JD JH YES 9H T...