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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#301897#7901. Basic Substring Structureucup-team173#WA 12ms15952kbC++175.1kb2024-01-10 14:00:452024-01-10 14:00:45

Judging History

你现在查看的是最新测评结果

  • [2024-01-10 14:00:45]
  • 评测
  • 测评结果:WA
  • 用时:12ms
  • 内存:15952kb
  • [2024-01-10 14:00:45]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define Mp make_pair
#define pb push_back
#define SZ(x) (int((x).size()))

typedef double db;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;

const int MAXN = 2e5 + 5;
const int Mod1 = 1e9 + 7, Mod2 = 998244353;
const int Base = 1313131;
int n, a[MAXN];

struct Hash{
    int val1, val2;
    Hash(int val = 0) : val1(val), val2(val) {}
    Hash(int val1, int val2) : val1(val1), val2(val2) {} 
}Fpow[MAXN], t[MAXN];

Hash operator + (Hash a, Hash b) {
    return Hash((a.val1 + b.val1) % Mod1, (a.val2 + b.val2) % Mod2);
}

Hash operator - (Hash a, Hash b) {
    return Hash((a.val1 - b.val1 + Mod1) % Mod1, (a.val2 - b.val2 + Mod2) % Mod2);
}

Hash operator * (Hash a, Hash b) {
    return Hash(1ll * a.val1 * b.val1 % Mod1, 1ll * a.val2 * b.val2 % Mod2);
}

bool operator == (Hash a, Hash b) {
    return a.val1 == b.val1 && a.val2 == b.val2;
}

Hash Get(int l, int r) {
    return t[r] - t[l - 1] * Fpow[r - l + 1];
} 
Hash GetWithChange(int l,int r,int i,int c){
    if(r<i||i<l)return Get(l,r);
    return t[r] - a[i] * Fpow[r - i] + c * Fpow[r - i] - t[l - 1] * Fpow[r - l + 1];
}
int pos[MAXN], len[MAXN];
int cnt[MAXN];
int cnt2[MAXN];
ll sumlen[MAXN], sumpos[MAXN];
ll sumpos2[MAXN];
ll sumlen2[MAXN];
map<int, ll> del[MAXN];

int lowbit(int x) {
    return x & -x;
}

ll val1[MAXN];
int val2[MAXN];

void add(int x, int v1, int v2) {
    for(x = n + 1 - x; x <= n; x += lowbit(x))
        val1[x] += v1, val2[x] += v2;
}
pair<ll, int> ask(int x) {
    pair<ll, int> res = make_pair(0ll, 0);
    for(x = n + 1 - x; x; x -= lowbit(x)) 
        res.first += val1[x], res.second += val2[x];
    return res;
}

void solve() {
    cin >> n;
    // memset(val1, 0, sizeof(val1)), memset(val2, 0, sizeof(val2));
    for(int i = 1; i <= n; i++) val1[i] = val2[i] = 0;
    for(int i = 1; i <= n; i++) sumlen[i] = sumlen2[i] = 0, sumpos[i] = sumpos2[i] = 0, cnt[i] = cnt2[i] = 0;
    Fpow[0] = 1;
    for(int i = 1; i <= n; i++) Fpow[i] = Fpow[i - 1] * Base;
    for(int i = 1; i <= n; i++) cin >> a[i], t[i] = t[i - 1] * Base + a[i];
    for(int i = 1; i <= n; i++) del[i].clear();
    for(int i = 1; i <= n; i++) {
        int l = i, r = n, ans = i - 1;
        while(l <= r) {
            int mid = l + r >> 1;
            if(Get(i, mid) == t[mid - i + 1]) ans = mid, l = mid + 1;
            else r = mid - 1;
        }
        pos[i] = ans, len[i] = ans - i + 1;
        cnt[ans]++, sumpos[ans] += i, sumlen[ans] += len[i];
        cnt2[i]++, sumpos2[i] += i,sumlen2[i] += len[i];
        if(ans != n) {
            int L = ans + 2, R = n, anss = ans + 1;
            while(L <= R) {
                int mid = L + R >> 1;
                if(GetWithChange(ans + 2, mid,ans+1,a[ans+2-i]) == GetWithChange(ans - i + 3 , mid - i + 1,ans+1,a[ans+2-i])) 
                    anss = mid, L = mid + 1;
                else R = mid - 1;
            }
            // cerr<<i<<" "<<ans<<"\n";
            del[ans + 1][a[ans - i + 2]] += anss - ans;
        }
        if(i > len[i] + 1) {
            int L = ans + 2, R = n, anss = ans + 1;
            while(L <= R) {
                int mid = L + R >> 1;
                if(GetWithChange(ans + 2, mid,len[i] + 1,a[i + len[i]]) == GetWithChange(ans - i + 3 , mid - i + 1,len[i] + 1,a[i + len[i]])) 
                    anss = mid, L = mid + 1;
                else R = mid - 1;
            }
            del[len[i] + 1][a[i + len[i]]] += anss - ans;
        }
        // l = i + 1, r = n, ans = i;
        // while(l <= r) {
        //     int mid = l + r >> 1;
        //     if(Get(i + 1, mid) == Get(2, mid - 1 + 1)) ans = mid, l = mid + 1;
        //     else r = mid - 1; 
        // }
        // del[i][a[1]] += ans - i + 1;
    }
    sumlen[n + 1] = sumpos[n + 1] = cnt[n + 1] = 0;
    sumlen2[n + 1] = sumpos2[n + 1] = cnt2[n + 1] = 0;
    for(int i = n; i >= 1; i--) {
        sumlen[i] += sumlen[i + 1];
        sumpos[i] += sumpos[i + 1];
        cnt[i] += cnt[i + 1];
        sumlen2[i] += sumlen2[i + 1];
        sumpos2[i] += sumpos2[i + 1];
        cnt2[i] += cnt2[i + 1];
    }
    ll Ans = 0;
    for(int i = 1; i <= n; i++) Ans += len[i];        
    ll res = 0;
    for(int i = n; i >= 1; i--) {
        ll m = Ans;
        m -= sumlen[i] - sumlen2[i + 1];
        m += 1ll * i * (cnt[i] - cnt2[i + 1]) - (sumpos[i] - sumpos2[i + 1]);
        m -= i - 1;
        m += n;
        pair<ll, int> t = ask(i);
        m -= t.first;
        m += 1ll * t.second * (i - 1);
        // cout << t.first << ' ' << t.second << ' ' << m << '\n';
        // m -= len[i];     
        ll Max = 0;
        for(auto [col, val] : del[i]) if(col != a[i]) Max = max(Max, val);
        m += Max;
        // cout<<Ans<<" "<<m<<" "<<Max<<"\n";
        res += m ^ i;
        add(len[i], len[i], 1);
    }
    cout << res << '\n';
}
/*
2
4
2 1 1 2
12
1 1 4 5 1 4 1 9 1 9 8 10
*/
signed main() {
    ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
    int t = 1;
    cin >> t;
    while(t--) solve();
    return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 15952kb

input:

2
4
2 1 1 2
12
1 1 4 5 1 4 1 9 1 9 8 10

output:

15
217

result:

ok 2 lines

Test #2:

score: -100
Wrong Answer
time: 12ms
memory: 15904kb

input:

10000
8
2 1 2 1 1 1 2 2
9
2 2 1 2 1 2 1 2 1
15
2 1 2 1 1 1 1 2 2 1 2 1 2 2 1
2
1 1
10
2 1 1 1 2 2 1 1 2 2
3
2 1 2
11
1 2 2 1 1 2 1 2 2 1 1
14
2 1 1 1 1 2 1 1 1 2 2 1 2 1
12
2 2 2 1 2 2 2 1 1 2 1 2
4
2 1 1 2
8
1 2 2 2 1 2 1 1
8
1 1 2 1 2 1 1 1
6
2 1 1 1 2 2
14
2 2 1 1 1 1 2 2 2 1 2 2 1 1
10
1 2 2 1 1...

output:

94
128
354
3
208
9
259
363
278
16
92
113
58
348
225
3
335
364
377
316
3
19
122
66
15
97
36
258
11
63
28
91
85
103
253
191
21
48
303
63
101
20
24
68
316
362
266
309
355
281
326
281
231
312
3
330
54
328
3
69
32
147
322
39
343
95
242
3
165
346
245
20
152
3
404
393
392
82
270
360
20
59
21
279
3
18
351
3...

result:

wrong answer 3rd lines differ - expected: '347', found: '354'