Submission #35652

#	Time	Username	Problem	Language	Result	Execution time	Memory
35652		imaxblue	Senior Postmen (BOI14_postmen)	C++14	100 / 100	483 ms	69624 KiB

postmen

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pb push_back
#define x first
#define y second
#define pii pair<int, int>
#define fox(k, x) for (int k=0; k<x; ++k)
#define foxr(k, x) for (int k=x-1; k>=0; --k)
#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
 #define pc(x) putchar_unlocked(x);
    inline void out(int n)
    {
        int N = n, rev, count = 0;
        rev = N;
        if (N == 0) { pc('0'); pc('\n'); return ;}
        while ((rev % 10) == 0) { count++; rev /= 10;} //obtain the count of the number of 0s
        rev = 0;
        while (N != 0) { rev = (rev<<3) + (rev<<1) + N % 10; N /= 10;}  //store reverse of N in rev
        while (rev != 0) { pc(rev % 10 + '0'); rev /= 10;}
        while (count--) pc('0');
    }
int n, m, a, b, t, p[500005];
bool u[500005], u2[500005];
vector<pii> v[500005];
vector<int> s, ans;
void dfs(int N){
    if (u[N]){
        t=-1;
        ans=vector<int>();
        while(t!=N){
            ans.pb(t=s.back()); s.pop_back();
            u[t]=0;
        }
        fox(l, ans.size()){
            out(ans[l]);
            if (l!=ans.size()-1) putchar_unlocked(' ');
        } putchar_unlocked('\n');
    }
    for(; p[N]<v[N].size(); ++p[N]){
        if (!u2[v[N][p[N]].y]){
            u[N]=1;
            s.pb(N);
            u2[v[N][p[N]].y]=1;
            dfs(v[N][p[N]].x);
        }
    }
}
int main(){
    scan(n); scan(m);
    fox(l, m){
        scan(a); scan(b);
        v[a].pb(mp(b, l));
        v[b].pb(mp(a, l));
    }
    dfs(1);
    return 0;
}

Compilation message (stderr)

postmen.cpp: In function 'void dfs(int)':
postmen.cpp:9:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define fox(k, x) for (int k=0; k<x; ++k)
postmen.cpp:37:13:
         fox(l, ans.size()){
             ~~~~~~~~~~~~~         
postmen.cpp:37:9: note: in expansion of macro 'fox'
         fox(l, ans.size()){
         ^~~
postmen.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (l!=ans.size()-1) putchar_unlocked(' ');
                 ~^~~~~~~~~~~~~~
postmen.cpp:42:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(; p[N]<v[N].size(); ++p[N]){
           ~~~~^~~~~~~~~~~~

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