oj.uz

Submission #946022

# Submission time Handle Problem Language Result Execution time Memory
946022 2024-03-14T09:40:40 Z hariaakas646 Election Campaign (JOI15_election_campaign) C++17
20 / 100
 1000 ms 55464 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
#define scd(t) scanf("%d", &t)
#define sclld(t) scanf("%lld", &t)
#define forr(i, l, r) for(int i=l; i<r; i++)
#define frange(i, l) forr(i, 0, l)
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define all(x) x.begin(), x.end()
 
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef long long lli;
typedef vector<vi> vvi;
typedef vector<lli> vll;
typedef vector<bool> vb;
typedef set<int> seti;
typedef multiset<int> mseti;
 
void usaco()
{
    freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
//    freopen("problem.out", "w", stdout);
}

vvi liftv;
vvi graph;
vi depth;

void dfs(int x, int p) {
    depth[x] = depth[p] + 1;
    liftv[0][x] = p;
    for(auto e : graph[x]) {
        if(e != p) {
            dfs(e, x);
        }
    }
}

int lift(int x, int c) {
    frange(i, 20) {
        if(c & (1<<i)) {
            x = liftv[i][x];
        }
    }
    return x;
}

int lca(int x, int y) {
    if(depth[y] > depth[x]) swap(x, y);
    x = lift(x, depth[x] - depth[y]);
    if(x == y) return x;
    for(int i=19; i>=0; i--) {
        int xt = liftv[i][x];
        int yt = liftv[i][y];
        if(xt != yt) {
            x = xt;
            y = yt;
        }
    }
    return liftv[0][x];
}

vvi st;
vvi lc;
vll cost;
lli tot = 0;

map<int, lli> dfs2(int x, int p) {
    map<int, lli> mv;
    for(auto e : st[x]) {
        mv[e] += 0;
    }
    for(auto e : graph[x]) {
        if(e != p) {
            map<int, lli> out = dfs2(e, x);
            if(mv.size() < out.size()) swap(mv, out);
            for(auto pi : out) {
                mv[pi.f] += pi.s;
            }
        }
    }
    lli ma = -1e18;
    
    // printf("%d\n", x);
    // for(auto e : mv) {
    //     printf("%d %lld\n", e.f, e.s);
    // }
    for(auto e : lc[x]) {
        ma = max(ma, mv[e] + cost[e]);
        mv.erase(e);
    }
    
    
    if(ma > 0) {
        tot += ma;
        for(auto e : mv) {
            mv[e.f] -= ma;
        }
    }
    return mv;
    
}

int main() {
    // usaco();
    int n;
    scd(n);
    graph = vvi(n+1);
    frange(i, n-1) {
        int a, b;
        scd(a);
        scd(b);
        graph[a].pb(b);
        graph[b].pb(a);
    }
    depth = vi(n+1);
    liftv = vvi(20, vi(n+1));
    dfs(1, 0);
    

    forr(i, 1, 20) {
        forr(j, 1, n+1) {
            liftv[i][j] = liftv[i-1][liftv[i-1][j]];
        }
    }

    st = lc = vvi(n+1);
    int m;
    scd(m);
    cost = vll(m);
    forr(i, 0, m) {
        int a, b;
        scd(a);
        scd(b);
        sclld(cost[i]);
        lc[lca(a, b)].pb(i);
        st[a].pb(i);
        st[b].pb(i);
    }

    dfs2(1, 0);
    printf("%lld", tot);
}

Compilation message

election_campaign.cpp: In function 'void usaco()':
election_campaign.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
election_campaign.cpp: In function 'int main()':
election_campaign.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
election_campaign.cpp:113:5: note: in expansion of macro 'scd'
  113 |     scd(n);
      |     ^~~
election_campaign.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
election_campaign.cpp:117:9: note: in expansion of macro 'scd'
  117 |         scd(a);
      |         ^~~
election_campaign.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
election_campaign.cpp:118:9: note: in expansion of macro 'scd'
  118 |         scd(b);
      |         ^~~
election_campaign.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
election_campaign.cpp:135:5: note: in expansion of macro 'scd'
  135 |     scd(m);
      |     ^~~
election_campaign.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
election_campaign.cpp:139:9: note: in expansion of macro 'scd'
  139 |         scd(a);
      |         ^~~
election_campaign.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
election_campaign.cpp:140:9: note: in expansion of macro 'scd'
  140 |         scd(b);
      |         ^~~
election_campaign.cpp:6:23: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 | #define sclld(t) scanf("%lld", &t)
      |                  ~~~~~^~~~~~~~~~~~
election_campaign.cpp:141:9: note: in expansion of macro 'sclld'
  141 |         sclld(cost[i]);
      |         ^~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 48 ms 19028 KB Output is correct
6 Correct 42 ms 39180 KB Output is correct
7 Correct 51 ms 31940 KB Output is correct
8 Correct 43 ms 19148 KB Output is correct
9 Correct 46 ms 28116 KB Output is correct
10 Correct 37 ms 19148 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 866 ms 55464 KB Output is correct
5 Correct 844 ms 55352 KB Output is correct
6 Execution timed out 1020 ms 55240 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 860 KB Output is correct
4 Correct 866 ms 55464 KB Output is correct
5 Correct 844 ms 55352 KB Output is correct
6 Execution timed out 1020 ms 55240 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 298 ms 32096 KB Output is correct
2 Execution timed out 1020 ms 55348 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 48 ms 19028 KB Output is correct
6 Correct 42 ms 39180 KB Output is correct
7 Correct 51 ms 31940 KB Output is correct
8 Correct 43 ms 19148 KB Output is correct
9 Correct 46 ms 28116 KB Output is correct
10 Correct 37 ms 19148 KB Output is correct
11 Correct 3 ms 600 KB Output is correct
12 Correct 2 ms 860 KB Output is correct
13 Correct 2 ms 860 KB Output is correct
14 Correct 2 ms 600 KB Output is correct
15 Correct 2 ms 604 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 2 ms 856 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 2 ms 856 KB Output is correct

Subtask #6
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 48 ms 19028 KB Output is correct
6 Correct 42 ms 39180 KB Output is correct
7 Correct 51 ms 31940 KB Output is correct
8 Correct 43 ms 19148 KB Output is correct
9 Correct 46 ms 28116 KB Output is correct
10 Correct 37 ms 19148 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 866 ms 55464 KB Output is correct
15 Correct 844 ms 55352 KB Output is correct
16 Execution timed out 1020 ms 55240 KB Time limit exceeded
17 Halted 0 ms 0 KB -