Submission #130839

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
130839	2019-07-16 06:55:43	PeppaPig	Valley (BOI19_valley)	C++14	100 / 100	266 ms	41436 KiB

valley

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#include <bits/stdc++.h>
#define long long long
#define pii pair<long, long>
#define x first
#define y second
using namespace std;
const int N = 1e5+5;
int n, s, q, e;
int u[N], v[N], w[N], in[N], out[N], pos[N];
int par[N][18], dep[N];
long d[N], dp[N], pre[N][18];
bitset<N> shop;
vector<pii> g[N];
void gen_lca(int u, int p) {
    static int idx = 0;
    in[u] = ++idx, pos[idx] = u;
    dep[u] = dep[p] + 1, par[u][0] = p;
    if(shop[u]) dp[u] = d[u];
    for(pii v : g[u]) if(v.x != p) {
        d[v.x] = d[u] + v.y;
        gen_lca(v.x, u);
        dp[u] = min(dp[u], dp[v.x]);
    }
    out[u] = idx;
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

valley.cpp: In function 'int main()':
valley.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d", &n, &s, &q, &e);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", u + i, v + i, w + i);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
valley.cpp:40:51: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1, a; i <= s; i++) scanf("%d", &a), shop[a] = true;
                                    ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
valley.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 27 / 27
• Subtask 3: 23 / 23
• Subtask 4: 41 / 41