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답안 #71584

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
71584 2018-08-25T07:35:31 Z 강태규(#2217) Logistical Metropolis (KRIII5_LM) C++11
7 / 7
 1734 ms 193296 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_map>
#include <functional>
#include <cstring>
#include <cmath>
#include <ctime>
#include <cstdlib>

using namespace std;
typedef long long llong;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<llong, llong> pll;

int n, m;
vector<int> edge[100001];
llong mstCost;
llong ans[100001];

struct _es {
    int x, y, c;
    void scan() {
        scanf("%d%d%d", &x, &y, &c);
        edge[x].push_back(y);
        edge[y].push_back(x);
        ans[x] += c;
        ans[y] += c;
    }
    bool operator<(const _es &p) const {
        return c < p.c;
    }
} es[300000];

namespace uf {
    int par[100001];
    int find(int x) {
        if (par[x]) return par[x] = find(par[x]);
        return x;
    }
    int merge(int x, int y) {
        x = find(x);
        y = find(y);
        if (x == y) return 0;
        par[y] = x;
        return 1;
    }
}

struct _edge {
    int x, c;
    _edge(int x, int c) : x(x), c(c) {}
};
vector<_edge> treeEdge[100001];

int par[100001][20];
int mx[100001][20];
int dep[100001];
int st[100001];
int ed[100001];
void dfs(int x, int p) {
    static int ord = 0;
    st[x] = ++ord;
    for (int i = 1; i < 20; ++i) {
        par[x][i] = par[par[x][i - 1]][i - 1];
        mx[x][i] = max(mx[x][i - 1], mx[par[x][i - 1]][i - 1]);
    }
    for (_edge i : treeEdge[x]) {
        if (i.x == p) continue;
        dep[i.x] = dep[x] + 1;
        par[i.x][0] = x;
        mx[i.x][0] = i.c;
        dfs(i.x, x);
    }
    ed[x] = ord;
}

int lca(int x, int y) {
    if (dep[x] < dep[y]) swap(x, y);
    for (int i = 20; i--; ) {
        if ((dep[x] - dep[y]) >> i) x = par[x][i];
    }
    if (x == y) return x;
    for (int i = 20; i--; ) {
        if (par[x][i] != par[y][i]) {
            x = par[x][i];
            y = par[y][i];
        }
    }
    return par[x][0];
}

void getMst() {
    sort(es, es + m);
    for (int i = 0; i < m; ++i) {
        int x = es[i].x;
        int y = es[i].y;
        int c = es[i].c;
        if (uf::merge(x, y)) {
            mstCost += c;
            treeEdge[x].emplace_back(y, c);
            treeEdge[y].emplace_back(x, c);
        }
    }
    dfs(1, 0);
}

void sortVs(vector<int> &v) {
    sort(v.begin(), v.end(), [&](int i, int j) { return st[i] < st[j]; });
    v.erase(unique(v.begin(), v.end()), v.end());
}

int getDist(int x, int p) {
    int ret = 0;
    for (int i = 20; i--; ) {
        if ((dep[x] - dep[p]) >> i) {
            ret = max(ret, mx[x][i]);
            x = par[x][i];
        }
    }
    return ret;
}

const llong inf = 1e18;
int ch[100001];
llong dp[100001][2];
void dfsCompress(const vector<int> &vs, int &i) {
    int x = vs[i];
    if (ch[x]) dp[x][0] = -inf, dp[x][1] = 0;
    else dp[x][0] = 0, dp[x][1] = -inf;
    for (++i; i < vs.size(); ) {
        int v = vs[i];
        if (ed[x] < st[v]) break;
        dfsCompress(vs, i);
        
        int d = getDist(v, x);
        llong val = max(dp[v][0], dp[v][1] + d);
        dp[x][1] = max(dp[x][1] + val, dp[x][0] + dp[v][1]);
        dp[x][0] += val;
    }
}

llong solve(int x) {
    vector<int> vs;
    vs.push_back(x);
    ch[x] = 1;
    for (int i : edge[x]) {
        vs.push_back(i);
        ch[i] = 1;
    }
    sortVs(vs);
    int sz = vs.size();
    for (int i = 1; i < sz; ++i) {
        vs.push_back(lca(vs[i - 1], vs[i]));
    }
    sortVs(vs);
    
    int ord = 0;
    dfsCompress(vs, ord);

    for (int i : vs) ch[i] = 0;
    return dp[vs[0]][1];
}

int main() {
    scanf("%d%d", &n, &m);
    for (int i = 0; i < m; ++i) {
        es[i].scan();
    }
    getMst();
    for (int i = 1; i <= n; ++i) {
        printf("%lld\n", mstCost + ans[i] - solve(i));
    }
    return 0;
}

Compilation message

LM.cpp: In function 'void dfsCompress(const std::vector<int>&, int&)':
LM.cpp:136:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (++i; i < vs.size(); ) {
               ~~^~~~~~~~~~~
LM.cpp: In function 'int main()':
LM.cpp:171:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
LM.cpp: In member function 'void _es::scan()':
LM.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &x, &y, &c);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 5368 KB Output is correct
2 Correct 15 ms 5524 KB Output is correct
3 Correct 14 ms 5700 KB Output is correct
4 Correct 15 ms 5804 KB Output is correct
5 Correct 12 ms 5852 KB Output is correct
6 Correct 15 ms 5972 KB Output is correct
7 Correct 13 ms 5972 KB Output is correct
8 Correct 12 ms 6072 KB Output is correct
9 Correct 12 ms 6120 KB Output is correct
10 Correct 15 ms 6120 KB Output is correct
11 Correct 14 ms 6220 KB Output is correct
12 Correct 12 ms 6268 KB Output is correct
13 Correct 12 ms 6316 KB Output is correct
14 Correct 12 ms 6428 KB Output is correct
15 Correct 11 ms 6476 KB Output is correct
16 Correct 13 ms 6524 KB Output is correct
17 Correct 12 ms 6524 KB Output is correct
18 Correct 11 ms 6636 KB Output is correct
19 Correct 12 ms 6684 KB Output is correct
20 Correct 13 ms 6712 KB Output is correct
21 Correct 14 ms 6756 KB Output is correct
22 Correct 13 ms 6784 KB Output is correct
23 Correct 12 ms 6824 KB Output is correct
24 Correct 12 ms 6824 KB Output is correct
25 Correct 9 ms 6824 KB Output is correct
26 Correct 7 ms 6824 KB Output is correct
27 Correct 7 ms 6824 KB Output is correct
28 Correct 11 ms 6824 KB Output is correct

Subtask #2
72.0 / 72.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1267 ms 41112 KB Output is correct
2 Correct 1263 ms 47796 KB Output is correct
3 Correct 1449 ms 54488 KB Output is correct
4 Correct 1252 ms 61116 KB Output is correct
5 Correct 1478 ms 67824 KB Output is correct
6 Correct 1211 ms 74628 KB Output is correct
7 Correct 1128 ms 81328 KB Output is correct
8 Correct 1144 ms 87920 KB Output is correct
9 Correct 1214 ms 94856 KB Output is correct
10 Correct 1161 ms 101468 KB Output is correct
11 Correct 912 ms 108024 KB Output is correct
12 Correct 1055 ms 114384 KB Output is correct
13 Correct 1253 ms 121168 KB Output is correct
14 Correct 1088 ms 128048 KB Output is correct
15 Correct 993 ms 134780 KB Output is correct
16 Correct 1376 ms 141012 KB Output is correct
17 Correct 1403 ms 148200 KB Output is correct
18 Correct 1333 ms 154620 KB Output is correct
19 Correct 1594 ms 160848 KB Output is correct
20 Correct 1454 ms 168128 KB Output is correct
21 Correct 1642 ms 173932 KB Output is correct
22 Correct 1734 ms 180720 KB Output is correct
23 Correct 1547 ms 187472 KB Output is correct
24 Correct 1670 ms 193296 KB Output is correct
25 Correct 13 ms 5368 KB Output is correct
26 Correct 15 ms 5524 KB Output is correct
27 Correct 14 ms 5700 KB Output is correct
28 Correct 15 ms 5804 KB Output is correct
29 Correct 12 ms 5852 KB Output is correct
30 Correct 15 ms 5972 KB Output is correct
31 Correct 13 ms 5972 KB Output is correct
32 Correct 12 ms 6072 KB Output is correct
33 Correct 12 ms 6120 KB Output is correct
34 Correct 15 ms 6120 KB Output is correct
35 Correct 14 ms 6220 KB Output is correct
36 Correct 12 ms 6268 KB Output is correct
37 Correct 12 ms 6316 KB Output is correct
38 Correct 12 ms 6428 KB Output is correct
39 Correct 11 ms 6476 KB Output is correct
40 Correct 13 ms 6524 KB Output is correct
41 Correct 12 ms 6524 KB Output is correct
42 Correct 11 ms 6636 KB Output is correct
43 Correct 12 ms 6684 KB Output is correct
44 Correct 13 ms 6712 KB Output is correct
45 Correct 14 ms 6756 KB Output is correct
46 Correct 13 ms 6784 KB Output is correct
47 Correct 12 ms 6824 KB Output is correct
48 Correct 12 ms 6824 KB Output is correct
49 Correct 9 ms 6824 KB Output is correct
50 Correct 7 ms 6824 KB Output is correct
51 Correct 7 ms 6824 KB Output is correct
52 Correct 11 ms 6824 KB Output is correct