Submission #106071

#	Time	Username	Problem	Language	Result	Execution time	Memory
106071		eriksuenderhauf	Bosses (BOI16_bosses)	C++11	100 / 100	841 ms	6040 KiB

bosses

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define enl printf("\n")
#define case(t) printf("Case #%d: ", (t))
#define ni(n) scanf("%d", &(n))
#define nl(n) scanf("%lld", &(n))
#define nai(a, n) for (int i = 0; i < (n); i++) ni(a[i])
#define nal(a, n) for (int i = 0; i < (n); i++) nl(a[i])
#define pri(n) printf("%d\n", (n))
#define prl(n) printf("%lld\n", (n))
#define pii pair<int, int>
#define pil pair<int, long long>
#define pll pair<long long, long long>
#define vii vector<pii>
#define vil vector<pil>
#define vll vector<pll>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef cc_hash_table<int,int,hash<int>> ht;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> oset;
const double pi = acos(-1);
const int MOD = 1e9 + 7;
const int INF = 1e9 + 7;
const int MAXN = 2e5 + 5;
const double eps = 1e-9;
vi adj[MAXN];
int d[MAXN], n;

int solve(int root) {
    memset(d, 0x3f, sizeof d);
    int ret = 1;
    deque<int> pq;
    pq.pb(root);
    d[root] = 1;
    while (!pq.empty()) {
        int u = pq.front(); pq.pop_front();
        for (int v: adj[u]) {
            if (d[v] <= d[u] + 1) continue;
            d[v] = d[u] + 1;
            ret += d[v];
            pq.pb(v);
        }
    }
    for (int i = 0; i < n; i++)
        if (d[i] == 1061109567)
            return INF;
    return ret;
}

int main() {
    ni(n);
    for (int i = 0; i < n; i++) {
        int k;
        ni(k);
        for (int j = 0; j < k; j++) {
            int u;
            ni(u); u--;
            adj[u].pb(i);
        }
    }
    int ans = INF;
    for (int i = 0; i < n; i++)
        ans = min(ans, solve(i));
    printf("%d\n", ans);
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:7:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define ni(n) scanf("%d", &(n))
               ~~~~~^~~~~~~~~~~~
bosses.cpp:60:5: note: in expansion of macro 'ni'
     ni(n);
     ^~
bosses.cpp:7:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define ni(n) scanf("%d", &(n))
               ~~~~~^~~~~~~~~~~~
bosses.cpp:63:9: note: in expansion of macro 'ni'
         ni(k);
         ^~
bosses.cpp:7:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 #define ni(n) scanf("%d", &(n))
               ~~~~~^~~~~~~~~~~~
bosses.cpp:66:13: note: in expansion of macro 'ni'
             ni(u); u--;
             ^~

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33