Submission #205800

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
205800	2020-03-01 02:33:33	PeppaPig	Railway (BOI17_railway)	C++14	100 / 100	166 ms	24692 KiB

railway

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#include <bits/stdc++.h>
#define pii pair<int, int>
#define x first
#define y  second
using namespace std;
const int N = 1e5+5;
int n, m, k;
int in[N], out[N], pos[N], hv[N], sz[N];
vector<pii> g[N];
int dfs(int u, int p) {
    static int idx = 0;
    pii ret(0, -1);
    pos[in[u] = ++idx] = u, sz[u] = 1;
    for(pii v : g[u]) if(v.x != p) {
        int z = dfs(v.x, u);
        sz[u] += z, ret = max(ret, pii(z, v.x));
    }
    hv[u] = ret.y, out[u] = idx;
    return sz[u];
}
vector<int> vec[N], ans;
int pol_sz[N], cnt[N], cur_ans;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

railway.cpp: In function 'int main()':
railway.cpp:78:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
     printf("%d\n", ans.size());
                    ~~~~~~~~~~^
railway.cpp:60:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &n, &m, &k);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
railway.cpp:62:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
railway.cpp:68:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a);
         ~~~~~^~~~~~~~~~
railway.cpp:71:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &b);
             ~~~~~^~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 7 / 7
• Subtask 4: 29 / 29
• Subtask 5: 16 / 16
• Subtask 6: 25 / 25