Submission #98425

#	Time	Username	Problem	Language	Result	Execution time	Memory
98425		Kastanda	Senior Postmen (BOI14_postmen)	C++11	100 / 100	400 ms	19532 KiB

postmen

#include<bits/stdc++.h>
using namespace std;
const int N = 500005;
int n, m, ets, cyc, to[N + N], M[N], S[N];
int head[N], nxt[N + N];
int ts, st[N];
int v, u;
inline void DFS()
{
    ts = 0;
    st[++ ts] = v;
    while (ts)
    {
        v = st[ts]; S[v] = 1;
        for (; ~head[v]; )
        {
            u = to[head[v]];
            if (M[head[v] >> 1])
            {
                head[v] = nxt[head[v]];
                continue;
            }
            M[head[v] >> 1] = 1;
            head[v] = nxt[head[v]];
            if (S[u])
            {
                while (st[ts] != u)
                {
                    printf("%d ", st[ts]);
                    S[st[ts]] = 0; ts --;
                }
                printf("%d\n", u);
                ts ++;
                break;
            }
            st[++ ts] = u;
            ts ++;
            break;
        }
        ts --;
    }
}
inline void Add(int vv, int uu)
{
    to[ets] = uu;
    nxt[ets] = head[vv];
    head[vv] = ets; ets ++;
}
int main()
{
    scanf("%d%d", &n, &m);
    memset(head, -1, sizeof(head));
    for (int i = 1; i <= m; i++)
    {
        int vv, uu;
        scanf("%d%d", &vv, &uu);
        Add(vv, uu); Add(uu, vv);
    }
    for (int i = 1; i <= n; i++)
        v = i, DFS();
    return 0;
}

Compilation message (stderr)

postmen.cpp: In function 'int main()':
postmen.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
postmen.cpp:56:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &vv, &uu);
         ~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 38 / 38
• Subtask 2: 17 / 17
• Subtask 3: 45 / 45