Submission #1046100

#	Time	Username	Problem	Language	Result	Execution time	Memory
1046100		c2zi6	Petrol stations (CEOI24_stations)	C++14	55 / 100	687 ms	2097156 KiB

Main

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef vector<char> VC;
typedef vector<VC> VVC;
typedef vector<bool> VB;
typedef vector<VB> VVB;
 
namespace TLE {
    int n, k;
    VVPI gp;
    VL ans;
    VI sub;
    void dfs(int u, int p, int fuel) {
        sub[u] = 1;
        for (auto[v, w] : gp[u]) if (v != p) {
            bool need = false;
            int f = fuel-w;
            if (f < 0) {
                f = k-w;
                need = true;
            }
            dfs(v, u, f);
            sub[u] += sub[v];
            if (need) ans[u] += sub[v];
        }
    }
    VL solve(VVPI GP_ARG, int K_ARG) {
        gp = GP_ARG;
        k = K_ARG;
        n = gp.size();
        ans = VL(n);
        sub = VI(n);
        rep(u, n) {
            /*ans = VL(n);*/
            dfs(u, -1, k);
            /*for (int x : ans) cout << x << " "; cout << endl;*/
        }
        return ans;
    }
};

int n, k;
VVPI gp;
VVL dp;
VI sbt;

void addnode(int u, int v, int w) {
    replr(j, 0, k) {
        if (j < w) dp[u][k-w] += dp[v][j];
        else dp[u][j-w] += dp[v][j];
    }
}
void remnode(int u, int v, int w) {
    replr(j, 0, k) {
        if (j < w) dp[u][k-w] -= dp[v][j];
        else dp[u][j-w] -= dp[v][j];
    }
}

VL ans;
void dfs(int u = 0, int p = -1) {
    sbt[u] = 1;
    dp[u][k]++;
    for (auto[v, w] : gp[u]) if (v != p) {
        dfs(v, u);
        addnode(u, v, w);
        sbt[u] += sbt[v];

        ll contr = 0;
        rep(j, w) contr += dp[v][j];
        ans[v] += contr * (n-sbt[v]);
        /*cout << "PROCESSING EDGE " << v << " " << u << ": " << contr << " * " << (n-sbt[v]) << endl;*/
    }
}
void reroot(int u = 0, int p = -1) {
    for (auto[v, w] : gp[u]) if (v != p) {
        remnode(u, v, w);
        addnode(v, u, w);

        ll contr = 0;
        rep(j, w) contr += dp[u][j];
        ans[u] += contr * (sbt[v]);
        /*cout << "PROCESSING EDGE " << u << " " << v << ": " << contr << " * " << (sbt[u]-1) << endl;*/

        reroot(v, u);
        
        remnode(v, u, w);
        addnode(u, v, w);
    }
}

void solve() {
    cin >> n >> k;
    gp = VVPI(n);
    rep(i, n-1) {
        int u, v, w;
        cin >> u >> v >> w;
        gp[u].pb({v, w});
        gp[v].pb({u, w});
    }

    /*ans = TLE::solve(gp, k);*/
    /*for (ll x : ans) cout << x << " "; cout << endl;*/

    ans = VL(n);
    dp = VVL(n, VL(k+1));
    /* dp[u][x]
     * how many roads visit city u with fuel x (from subtree of u)
     */
    ans = VL(n);
    sbt = VI(n);
    dfs();
    /*rep(u, n) cout << u << ": " << sbt[u] << endl;*/
    reroot();
    for (ll x : ans) cout << x << " "; cout << endl;
}
 
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL), cout.tie(NULL);
	/*freopen("mincross.in", "r", stdin); */
	/*freopen("test.out", "w", stdout); */
	int t = 1;
	/*cin >> t; */
	while (t--) solve();
}

Compilation message (stderr)

Main.cpp: In function 'void TLE::dfs(int, int, int)':
Main.cpp:44:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   44 |         for (auto[v, w] : gp[u]) if (v != p) {
      |                  ^
Main.cpp: In function 'void dfs(int, int)':
Main.cpp:93:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   93 |     for (auto[v, w] : gp[u]) if (v != p) {
      |              ^
Main.cpp: In function 'void reroot(int, int)':
Main.cpp:105:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  105 |     for (auto[v, w] : gp[u]) if (v != p) {
      |              ^
Main.cpp: In function 'void solve()':
Main.cpp:144:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  144 |     for (ll x : ans) cout << x << " "; cout << endl;
      |     ^~~
Main.cpp:144:40: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  144 |     for (ll x : ans) cout << x << " "; cout << endl;
      |                                        ^~~~

• Subtask 0: 0 / 0
• Subtask 1: 18 / 18
• Subtask 2: 8 / 8
• Subtask 3: 0 / 10
• Subtask 4: 12 / 12
• Subtask 5: 17 / 17
• Subtask 6: 0 / 35