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#471530#1281. Longest Common Subsequence_log_WA 90ms7056kbC++143.0kb2024-07-10 21:49:212024-07-10 21:49:21

Judging History

你现在查看的是最新测评结果

  • [2024-07-10 21:49:21]
  • 评测
  • 测评结果:WA
  • 用时:90ms
  • 内存:7056kb
  • [2024-07-10 21:49:21]
  • 提交

answer

# include <bits/stdc++.h>
# define rep(i, j, k) for(int i = j; i <= k; ++i)
# define per(i, j, k) for(int i = j; i >= k; --i)
# define go(u) for(int i = head[u], v; v = to[i], w = W[i], i; i = nxt[i])
# define maxn 100100
using namespace std;

int T, n, m, ans;
int a[maxn], b[maxn], la[maxn], ra[maxn], lb[maxn], rb[maxn], suma[maxn], sumb[maxn], cnt[2][4];
int pos[maxn];

namespace BIT {
    # define f(x) (x + maxn)
    # define lowbit(x) (x & -x)
    int Max[2][maxn << 1];
    vector<pair<bool, int> > Furina;
    inline void update(int pos, int x, int t) {
        while(pos <= f(min(n, m))) {
            Max[t][pos] = max(Max[t][pos], x);
            if(Max[t][pos] > -0x3f3f3f3f) Furina.push_back({t, pos});
            pos += lowbit(pos);
        }
    }
    inline int query(int pos, int t) {
        int Max1 = -2e9;
        while(pos) Max1 = max(Max1, Max[t][pos]), pos -= lowbit(pos); return Max1;
    }
    inline void init() {
        rep(i, 0, (int)Furina.size() - 1) {
            int t = Furina[i].first, pos = Furina[i].second;
            Max[t][pos] = -0x3f3f3f3f;
        }
        memset(cnt, 0, sizeof(cnt));
    }
} using namespace BIT;

void solve() {
    init();
    Furina.clear();
    cin >> n >> m; rep(i, 1, n) cin >> a[i]; rep(i, 1, m) cin >> b[i]; ans = -2e9;
    ra[0] = n + 1, rb[0] = m + 1;
    rep(i, 1, n) {
        suma[i] = suma[i - 1] + (a[i] == 2);
        if(a[i] == 1) la[++cnt[0][1]] = i;
    }
    per(i, n, 1) if(a[i] == 3) ra[++cnt[0][3]] = i;
    rep(i, 1, m) {
        sumb[i] = sumb[i - 1] + (b[i] == 2);
        if(b[i] == 1) lb[++cnt[1][1]] = i;
    }
    per(i, m, 1) if(b[i] == 3) rb[++cnt[1][3]] = i;
    per(i, m, 1) if(b[i] == 3) rb[++cnt[1][3]] = i;
    for(int i = min(cnt[0][1], cnt[1][1]), j = 0; j <= min(cnt[0][3], cnt[1][3]); ++j) {
        while(la[i] >= ra[j] || lb[i] >= rb[j]) --i; pos[j] = i;
    }
    update(f(sumb[lb[0]] - suma[la[0]]), sumb[lb[0]], 0);
    update(f(suma[la[0]] - sumb[lb[0]]), suma[la[0]], 1);
    // cout << sumb[lb[0]] - suma[la[0]] << ' ' << suma[la[0]] - sumb[lb[0]] << '\n';
    per(j, min(cnt[0][3], cnt[1][3]), 0) {
        rep(i, pos[j + 1] + 1, pos[j]) {
            update(f(sumb[lb[i]] - suma[la[i]]), i - sumb[lb[i]], 0);
            update(f(suma[la[i]] - sumb[lb[i]]), i - suma[la[i]], 1);
        }
        // cout << ra[j] << ' ' << sumb[rb[j] - 1] << ' ' << suma[ra[j] - 1] - sumb[rb[j] - 1] << ' ' << query(f(suma[ra[j] - 1] - sumb[rb[j] - 1]), 0) + j << '\n';
        // cout << ra[j] << ' ' << suma[ra[j] - 1] << ' ' << sumb[rb[j] - 1] - suma[ra[j] - 1] << ' ' << query(f(sumb[rb[j] - 1] - suma[ra[j] - 1]), 1) + j << '\n';
        ans = max(ans, sumb[rb[j] - 1] + query(f(suma[ra[j] - 1] - sumb[rb[j] - 1]), 0) + j);
        ans = max(ans, suma[ra[j] - 1] + query(f(sumb[rb[j] - 1] - suma[ra[j] - 1]), 1) + j);
    }
    cout << ans << '\n';
}

signed main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> T; memset(Max, -0x3f, sizeof(Max));
    while(T--) {
        solve();
    }
    return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 6868kb

input:

3
3 3
1 2 3
1 2 3
3 3
1 1 1
1 1 2
3 3
1 3 2
1 2 3

output:

3
2
2

result:

ok 3 tokens

Test #2:

score: -100
Wrong Answer
time: 90ms
memory: 7056kb

input:

139889
1 10
2
2 1 2 2 3 1 1 2 3 3
7 1
3 2 3 3 1 1 2
2
6 1
2 1 3 1 1 1
1
8 7
3 1 3 3 2 2 3 1
3 2 2 1 3 3 3
10 3
3 2 1 1 2 2 1 1 1 1
3 1 1
5 2
1 2 1 3 1
1 2
1 4
1
3 3 3 3
7 2
3 1 2 1 2 2 3
3 2
6 2
3 1 1 2 1 3
1 3
1 4
1
3 1 1 3
4 2
2 3 2 3
1 3
1 8
1
1 1 3 1 3 3 3 1
4 1
1 3 3 3
1
10 10
3 1 2 1 2 2 2 2 1...

output:

1
1
1
4
2
2
0
2
2
0
2
1
1
7
0
0
0
2
2
3
5
4
1
1
1
0
2
3
5
6
5
0
2
3
2
-1044266554
2
1
3
1
1
2
3
1
1
2
5
2
0
3
1
3
2
4
2
0
4
1
2
3
4
1
4
4
5
2
2
1
1
1
2
4
3
1
2
2
2
3
2
3
2
1
6
1
4
2
1
3
4
4
6
2
1
3
0
3
0
2
1
2
2
5
3
2
0
2
1
4
2
3
2
2
0
-1044266554
1
4
2
3
0
6
1
4
2
2
3
1
1
0
1
2
1
2
3
3
3
2
4
3
3
1
...

result:

wrong answer 8th words differ - expected: '1', found: '2'