Submission #842235

#	Time	Username	Problem	Language	Result	Execution time	Memory
842235		green_gold_dog	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	1 ms	348 KiB

joi2019_ho_t4

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,abm,popcnt,mmx")
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef double db;
typedef long double ldb;
typedef complex<double> cd;

constexpr ll INF64 = 9'000'000'000'000'000'000, INF32 = 2'000'000'000, MOD = 1'000'000'007;
constexpr db PI = acos(-1);
constexpr bool IS_FILE = false, IS_TEST_CASES = false;

random_device rd;
mt19937 rnd32(rd());
mt19937_64 rnd64(rd());

template<typename T>
bool assign_max(T& a, T b) {
        if (b > a) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
bool assign_min(T& a, T b) {
        if (b < a) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
T square(T a) {
        return a * a;
}

template<>
struct std::hash<pair<ll, ll>> {
        ll operator() (pair<ll, ll> p) const {
                return ((__int128)p.first * MOD + p.second) % INF64;
        }
};

void solve() {
        ll n;
        cin >> n;
        vector<ll> col1(n, 0), col2(n, 0);
        ll ans = 0;
        for (ll i = 0; i < n * 2; i++) {
                ll x, y;
                cin >> x >> y;
                if (x < 1) {
                        ans += 1 - x;
                        x = 1;
                }
                if (x > n) {
                        ans += x - n;
                        x = n;
                }
                x--;
                if (y >= 2) {
                        col2[x]++;
                        ans += y - 2;
                } else {
                        col1[x]++;
                        ans += 1 - y;
                }
        }
        deque<ll> all1, all2;
        for (ll i = 0; i < n; i++) {
                for (ll j = 0; j < col1[i]; j++) {
                        all1.push_back(i);
                }
                for (ll j = 0; j < col2[i]; j++) {
                        all2.push_back(i);
                }
        }
        ll nc1 = 0, nc2 = 0;
        for (ll i = 0; i < n; i++) {
                ans += nc1 + nc2;
                while (!all1.empty() && all1.front() == i) {
                        nc1++;
                        all1.pop_front();
                }
                while (!all2.empty() && all2.front() == i) {
                        nc2++;
                        all2.pop_front();
                }
                bool b1 = false, b2 = false;
                if (nc1) {
                        nc1--;
                        b1 = true;
                }
                if (nc2) {
                        nc2--;
                        b2 = true;
                }
                if (!b1 && !b2) {
                        ll ba = INF32;
                        ll d1 = 0, d2 = 0;
                        if (all1.size() >= 2) {
                                if (assign_min(ba, all1[0] + all1[1] - i * 2 + 1)) {
                                        d1 = 2;
                                }
                        }
                        if (all2.size() >= 2) {
                                if (assign_min(ba, all2[0] + all2[1] - i * 2 + 1)) {
                                        d1 = 0;
                                        d2 = 2;
                                }
                        }
                        if (!all1.empty() && !all2.empty()) {
                                if (assign_min(ba, all1[0] + all2[0] - i * 2)) {
                                        d1 = 1;
                                        d2 = 1;
                                }
                        }
                        ans += ba;
                        for (ll i = 0; i < d1; i++) {
                                all1.pop_front();
                        }
                        for (ll i = 0; i < d2; i++) {
                                all2.pop_front();
                        }
                        b1 = true;
                        b2 = true;
                }
                if (!b1) {
                        if (nc2) {
                                nc2--;
                                ans++;
                                continue;
                        }
                        ll ba = INF32;
                        bool u1;
                        if (!all1.empty()) {
                                if (assign_min(ba, all1[0] - i)) {
                                        u1 = true;
                                }
                        }
                        if (!all2.empty()) {
                                if (assign_min(ba, all2[0] - i + 1)) {
                                        u1 = false;
                                }
                        }
                        ans += ba;
                        if (u1) {
                                all1.pop_front();
                        } else {
                                all2.pop_front();
                        }
                }
                if (!b2) {
                        if (nc1) {
                                nc1--;
                                ans++;
                                continue;
                        }
                        ll ba = INF32;
                        bool u1;
                        if (!all1.empty()) {
                                if (assign_min(ba, all1[0] - i + 1)) {
                                        u1 = true;
                                }
                        }
                        if (!all2.empty()) {
                                if (assign_min(ba, all2[0] - i)) {
                                        u1 = false;
                                }
                        }
                        ans += ba;
                        if (u1) {
                                all1.pop_front();
                        } else {
                                all2.pop_front();
                        }
                }
        }
        cout << ans << '\n';
}

int main() {
        if (IS_FILE) {
                freopen("", "r", stdin);
                freopen("", "w", stdout);
        }
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);
        ll t = 1;
        if (IS_TEST_CASES) {
                cin >> t;
        }
        for (ll i = 0; i < t; i++) {
                solve();
        }
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:190:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  190 |                 freopen("", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:191:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  191 |                 freopen("", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp: In function 'void solve()':
joi2019_ho_t4.cpp:178:25: warning: 'u1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  178 |                         if (u1) {
      |                         ^~
joi2019_ho_t4.cpp:153:25: warning: 'u1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  153 |                         if (u1) {
      |                         ^~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63