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답안 #239749

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
239749 2020-06-17T08:46:08 Z VEGAnn Go (COCI18_go) C++14
100 / 100
 188 ms 95480 KB 
#include <bits/stdc++.h>
#define PB push_back
#define sz(x) ((int)x.size())
#define i3 array<int,3>
using namespace std;
typedef long double ld;
typedef long long ll;
const int N = 200100;
const int M = 110;
const int K = 110;
const int T = 2010;
const int oo = 2e9;
i3 a[M];
short f[T][M][M][2], ans = 0, n, k, m;

void upd(short &x, short y){
    x = max(x, y);
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#endif // _LOCAL

    cin >> n >> k >> m;

    for (int i = 0; i < m; i++)
        cin >> a[i][0] >> a[i][1] >> a[i][2];

    a[m++] = {k, 0, 1};

    sort(a, a + m);

    for (int tim = 1; tim < T; tim++)
    for (int l = 0; l < m; l++)
    for (int r = l; r < m; r++)
    for (int tp = 0; tp < 2; tp++)
        f[tim][l][r][tp] = -1;

    for (int i = 0; i < m; i++)
        if (a[i][0] == k && a[i][1] == 0)
            f[1][i][i][0] = 0;

    for (int tim = 1; tim < T; tim++){
        for (int l = 0; l < m; l++)
        for (int r = l; r < m; r++)
        for (int tp = 0; tp < 2; tp++){
            if (f[tim][l][r][tp] < 0) continue;

            if (ans < f[tim][l][r][tp]){
                ans = f[tim][l][r][tp];
//                cerr << ans << " " << tim << " " << l << " " << r << '\n';
            }

            if (l > 0){
                int nw = tim;

                if (tp == 0)
                    nw += a[l][0] - a[l - 1][0];
                else nw += a[r][0] - a[l - 1][0];

                if (nw < T)
                    upd(f[nw][l - 1][r][0], f[tim][l][r][tp] + (nw <= a[l - 1][2] ? a[l - 1][1] : 0));
            }

            if (r < m - 1){
                int nw = tim;

                if (tp == 1)
                    nw += a[r + 1][0] - a[r][0];
                else nw += a[r + 1][0] - a[l][0];

                if (nw < T)
                    upd(f[nw][l][r + 1][1], f[tim][l][r][tp] + (nw <= a[r + 1][2] ? a[r + 1][1] : 0));
            }
        }
    }

    cout << ans;

    return 0;
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 12032 KB Output is correct
2 Correct 14 ms 17280 KB Output is correct
3 Correct 16 ms 20736 KB Output is correct
4 Correct 20 ms 25984 KB Output is correct
5 Correct 57 ms 52096 KB Output is correct
6 Correct 59 ms 60920 KB Output is correct
7 Correct 88 ms 69496 KB Output is correct
8 Correct 103 ms 78200 KB Output is correct
9 Correct 188 ms 86904 KB Output is correct
10 Correct 125 ms 95480 KB Output is correct