QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#789519#114. Construction of Highway_8_8_#0 1ms9716kbC++203.2kb2024-11-27 20:39:492024-11-27 20:39:49

Judging History

你现在查看的是最新测评结果

  • [2024-11-27 20:39:49]
  • 评测
  • 测评结果:0
  • 用时:1ms
  • 内存:9716kb
  • [2024-11-27 20:39:49]
  • 提交

answer

#include <bits/stdc++.h> 

using namespace std;

typedef long long ll;
#pragma GCC optimize(Ofast)
#pragma GCC optimize(unroll-loops)
const int N = (int)1e5 + 12, MOD = (int)1e9 + 7;

int B = 19;
int n, c[N], sum = 0, up[N][19];
void make() {
    vector<int> cl;
    for(int i = 1; i <= n; i++) {
        cl.push_back(c[i]);
    }
    sort(cl.begin(), cl.end());
    cl.resize(unique(cl.begin(), cl.end()) - cl.begin());
    for(int i = 1; i <= n; i++) {
        c[i] = lower_bound(cl.begin(), cl.end(), c[i]) - cl.begin() + 1;
    }
}
int t[N], a[N], b[N], tin[N], tout[N];
vector<int> g[N];
pair<int, int> s[N * 8];

void upd(int pos, pair<int, int> val, int v = 1, int tl = 1, int tr = n + n) {
    if(tl == tr) {
        s[v] = val; 
    } else {
        int tm = (tl + tr) >> 1;
        if(pos <= tm) upd(pos, val, v + v, tl, tm);
        else upd(pos, val, v + v + 1, tm + 1, tr);
        s[v] = max(s[v + v], s[v + v + 1]);
    }
}
pair<int, int> get1(int l, int r, int v = 1, int tl = 1, int tr = n + n) {
    if(l > r || tl > r || l > tr) return {0, 0};
    if(tl >= l && tr <= r) return s[v];
    int tm = (tl + tr) >> 1;
    return max(get1(l, r, v + v, tl, tm), get1(l, r, v + v + 1, tm + 1, tr));
}
void add(int pos, int val) {
    while(pos <= n ) {
        t[pos] += val;
        pos += pos & -pos;
    }
}
int get(int i) {
    int ret = 0;
    while(i) {
        ret += t[i];
        i -= i & -i;
    }
    return ret;
}
int get(int l, int r) {
    return get(r) - get(l - 1);
}
void edge(int u, int v) {
    up[v][0] = u;
    g[u].push_back(v);
    for(int i = 1; i < B; i++) {
        up[v][i] = up[up[v][i - 1]][i - 1];
    }
}
int timer = 0;

void dfs(int v) {
    tin[v] = ++timer;
    for(int to : g[v]) {
        dfs(to);
    }
    tout[v] = ++timer;
}
pair<int, int> val[N];
int vis[N]; 
void test() {
    cin >> n;
    for(int i = 1; i <= n; i++) {
        cin >> c[i];
    }
    make();

    for(int i = 1; i <= n - 1; i++) {
        cin >> a[i] >> b[i];
        edge(a[i], b[i]);
    }
    dfs(1);
    upd(tin[1],{0, c[1]});
    for(int i = 1; i <= n - 1; i++) {
        vector<pair<int, int>> x;
        int v = a[i];
        while(v) {
            int col = 1;
            auto r = get1(tin[v], tout[v]);
            for(int i = B - 1; i >= 0; i--) {
                int nv = up[v][i];
                if(vis[nv] != i) {
                    vis[nv] = i;
                    val[nv] = get1(tin[nv], tout[nv]);
                }
                if(nv && val[nv] == r) {
                    v = nv;
                    col += (1 << i);
                }
            }
            x.push_back({r.second, col});
            v = up[v][0];
        }
        reverse(x.begin(), x.end());
        ll res = 0;
        int m = (int)x.size();
        for(auto [j, k] : x) {
            res += get(j + 1, n) * 1ll * k;
            add(j, k);
        }
        for(auto [j, k] : x) {
            add(j, -k);
        }
        upd(tin[b[i]], {i, c[b[i]]});
        cout << res << '\n';
    }
}

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

    int t = 1;
    // cin >> t;

    while(t--) 
        test();

    return 0;
}

详细

Subtask #1:

score: 0
Wrong Answer

Test #1:

score: 7
Accepted
time: 1ms
memory: 7676kb

input:

2
804289384 846930887
1 2

output:

0

result:

ok single line: '0'

Test #2:

score: 7
Accepted
time: 0ms
memory: 9716kb

input:

10
505335291 738766720 190686789 260874576 747983062 906156499 502820865 142559278 261608746 380759628
1 3
1 5
5 7
3 8
1 4
3 10
7 6
5 9
5 2

output:

0
0
0
1
0
1
0
0
0

result:

ok 9 lines

Test #3:

score: 0
Wrong Answer
time: 1ms
memory: 7680kb

input:

100
205554747 483147986 844158169 953350441 612121426 310914941 210224073 856883377 922860802 495649265 8614859 989089925 378651394 344681740 29100603 816952842 21468265 552076976 87517202 953369896 374612516 787097143 126313439 207815259 287632274 886964648 220723886 119448938 444268469 865680799 6...

output:

0
0
0
0
0
0
0
0
0
1
0
0
2
0
0
0
0
0
2
0
3
4
3
0
0
1
2
1
0
2
0
2
0
5
6
1
1
2
0
0
1
1
0
1
0
2
4
0
4
1
2
2
3
0
2
0
0
0
8
0
2
2
0
1
3
2
8
2
0
0
2
0
0
1
0
4
2
0
3
0
2
6
2
0
1
1
0
0
4
4
1
1
0
0
1
6
1
2
0

result:

wrong answer 83rd lines differ - expected: '3', found: '2'

Subtask #2:

score: 0
Skipped

Dependency #1:

0%

Subtask #3:

score: 0
Skipped

Dependency #1:

0%