Submission #719995

#	Time	Username	Problem	Language	Result	Execution time	Memory
719995		HaiHoang	메기 농장 (IOI22_fish)	C++17	9 / 100	96 ms	17512 KiB

fish

#include <bits/stdc++.h>

using namespace std;

#define MASK(x) (1LL << (x))
#define BIT(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end()

#define REP(i, n) for (int i = 0, _n = n; i < _n; ++i)
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define FORE(it, s) for (__typeof(s.begin()) it = (s).begin(); it != (s).end(); ++it)

template <class U, class V> bool maximize(U &A, const V &B) { return (A < B) ? (A = B, true) : false; }
template <class U, class V> bool minimize(U &A, const V &B) { return (A > B) ? (A = B, true) : false; }
const int MAXN = 1e5 + 5;
namespace sub1 {
    bool check(int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
        REP(i, M) if(X[i] % 2 == 1) return false;
        return true;
    }
    long long Main(int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
        long long ans = 0;
        REP(i, M) ans += W[i];
        return ans;
    }
}
namespace sub2 {
    long long pre[2][MAXN];
    bool check(int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
        REP(i, M) if(X[i] > 1) return false;
        return true;
    }
    long long Main(int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
        long long ans = 0;
        REP(i, M) pre[X[i]][Y[i]] += W[i];
        FOR(i, 1, N - 1) {
            pre[0][i] += pre[0][i - 1];
            pre[1][i] += pre[1][i - 1];
        }
        ans = max(pre[0][N - 1], pre[1][N - 1]);
        if(N == 2) return ans;
        REP(i, N) {
            long long val = pre[1][N - 1] - pre[1][i];
            maximize(ans, val + pre[0][i]);
        }
        return ans;
    }
}
namespace sub3 {
    bool check (int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
        REP(i, M) if(Y[i]) return false;
        return true;
    }
    long long dp[100005][2], a[100005];
    long long Main(int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
        long long ans = 0;
        REP(i, M) a[X[i] + 1] += W[i];
        FOR(i, 1, N) {
            maximize(dp[i][1], a[i - 1] + a[i + 1]);
            maximize(dp[i][1], dp[i - 1][0] + a[i + 1]);
            maximize(dp[i][1], dp[i - 1][1] - a[i] + a[i + 1]);
            maximize(dp[i][0], dp[i - 1][1]);
            maximize(dp[i][0], dp[i - 1][0]);
            maximize(ans, dp[i][0]);
            maximize(ans, dp[i][1]);
            // cout << dp[i][0] << " " << dp[i][1] << '\n';
        }
        return ans;
    }
}
long long max_weights(int N, int M, vector <int> X, vector <int> Y, vector <int> W) {
    if(sub1::check(N, M, X, Y, W)) return sub1::Main(N, M, X, Y, W);
    if(sub2::check(N, M, X, Y, W)) return sub2::Main(N, M, X, Y, W);
    if(sub3::check(N, M, X, Y, W)) return sub3::Main(N, M, X, Y, W);
    return 0;
}

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 0 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16