oj.uz

답안 #1056626

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1056626 2024-08-13T10:23:19 Z perekopskad 봉쇄 시간 (IOI23_closing) C++17
0 / 100
 422 ms 14956 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

#define el '\n'
#define ff first
#define ss second
#define pii pair <ll, ll>
#define pb push_back
#define mkp make_pair
#define fr(i, l, r) for(ll i = l; i <= r; i++)
#define debug(x) \
    { cout << #x << " = " << x << el; }

template<class T, class S>
inline bool chmax(T &a, const S &b) {
    return (a < b ? a = b, 1 : 0);
}

template<class T, class S>
inline bool chmin(T &a, const S &b) {
    return (a > b ? a = b, 1 : 0);
}

const ll N = 2e5 + 10;
const ll M = 1e5 + 10;
const ll K = 400;
const ll INF = 1e18 + 10;
const ll inf = 1e9 + 10;
const ll LOG = 20;
const ll mod = 1000002022;
mt19937 rnd(time(0));

/*
1
7 1 4 19
0 1 1
1 2 4
2 3 2
3 4 1
4 5 3
5 6 2
*/

ll x[N], y[N], pref[N], pref2[N], mnv[N];

int max_score(int N, int X, int Y, long long K, std::vector<int> U, std::vector<int> V, std::vector<int> W) {
    fr(i, 0, N) {
        x[i] = 0;
        y[i] = 0;
        pref[i] = 0;
        pref2[i] = 0;
        mnv[i] = INF;
    }

    if(X > Y) swap(X, Y);
    for(int i = X - 1; i >= 0; i--)
        x[i] = x[i + 1] + W[i];
    for(int i = Y - 1; i >= 0; i--)
        y[i] = y[i + 1] + W[i];
    for(int i = X + 1; i < N; i++)
        x[i] = x[i - 1] + W[i - 1];
    for(int i = Y + 1; i < N; i++)
        y[i] = y[i - 1] + W[i - 1];

    vector <ll> s;
    for(int i = 0; i < N; i++) {
        ll mn = min(x[i], y[i]);
        s.pb(mn);
        pref[i] = mn;
        pref2[i] = x[i] + y[i] - 2 * mn;
        if(i) pref[i] += pref[i - 1];
        if(i) pref2[i] += pref2[i - 1];
        //cout << i << " " << x[i] << " " << y[i] << el;
    }

    for(int L = X + 1; L < Y; L++) {
        for(int R = L; R < Y; R++) {
            if(x[L - 1] > y[L - 1]) continue;
            if(y[R + 1] > x[R + 1]) continue;

            ll val = pref2[R] - pref2[L - 1];
            ll d = R - L + 1;
            chmin(mnv[d], val);
        }
    }
    for(int i = N - 1; i >= 0; i--)
        chmin(mnv[i], mnv[i + 1]);

    sort(s.begin(), s.end());
    ll ans = 0;
    ll k2 = K;
    for(int i = 0; i < s.size(); i++) {
        if(k2 >= s[i]) {
            k2 -= s[i];
            ans++;
        }
    }
    for(int L = 0; L <= X; L++) {
        for(int R = Y; R < N; R++) {
            ll k2 = K - pref[R];
            if(L) k2 += pref[L - 1];
            if(k2 < 0) {
                R = N;
                continue;
            }

            ll res = R - L + 1;

            ll l = 0, r = N;
            while(l < r) {
                ll mid = (l + r + 1) / 2;
                if(mnv[mid] <= k2) l = mid;
                else r = mid - 1;
            }

            if(l) {
                k2 -= mnv[l];
                res += l;
            }
            res += k2 / x[Y];

            //cout << L << " " << R << " " << res << el;
            chmax(ans, res);
        }
    }
    chmin(ans, 2 * N);
    return ans;
}

/*
int main() {
  int Q;
  assert(1 == scanf("%d", &Q));

  std::vector<int> N(Q), X(Q), Y(Q);
  std::vector<long long> K(Q);
  std::vector<std::vector<int>> U(Q), V(Q), W(Q);

  for (int q = 0; q < Q; q++) {
    assert(4 == scanf("%d %d %d %lld", &N[q], &X[q], &Y[q], &K[q]));

    U[q].resize(N[q] - 1);
    V[q].resize(N[q] - 1);
    W[q].resize(N[q] - 1);
    for (int i = 0; i < N[q] - 1; ++i) {
      assert(3 == scanf("%d %d %d", &U[q][i], &V[q][i], &W[q][i]));
    }
  }
  fclose(stdin);

  std::vector<int> result(Q);
  for (int q = 0; q < Q; q++) {
    result[q] = max_score(N[q], X[q], Y[q], K[q], U[q], V[q], W[q]);
  }

  for (int q = 0; q < Q; q++) {
    printf("%d\n", result[q]);
  }
  fclose(stdout);

  return 0;
}
*/

Compilation message

closing.cpp: In function 'int max_score(int, int, int, long long int, std::vector<int>, std::vector<int>, std::vector<int>)':
closing.cpp:94:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |     for(int i = 0; i < s.size(); i++) {
      |                    ~~^~~~~~~~~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 6492 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #1
0.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 422 ms 14956 KB 1st lines differ - on the 1st token, expected: '451', found: '371'
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Incorrect 0 ms 6492 KB 1st lines differ - on the 1st token, expected: '30', found: '40'
3 Halted 0 ms 0 KB -

Subtask #3
0.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Incorrect 0 ms 6492 KB 1st lines differ - on the 1st token, expected: '30', found: '40'
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6744 KB Output is correct
2 Incorrect 0 ms 6492 KB 1st lines differ - on the 1st token, expected: '30', found: '40'
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 6492 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 6492 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #7
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 6492 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #8
0.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 6492 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -

Subtask #9
0.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 6492 KB 1st lines differ - on the 1st token, expected: '6', found: '5'
2 Halted 0 ms 0 KB -