Submission #313682

#	Time	Username	Problem	Language	Result	Execution time	Memory
313682		neki	Wand (COCI19_wand)	C++14	70 / 70	131 ms	6508 KiB

wand

#include <bits/stdc++.h>
#define loop(i, a, b) for(long long i=a;i<b;i++)
#define pool(i, a, b) for(long long i=a-1;i>=b;i--)
#define fore(i, a) for(auto&& i:a)
#define fi first
#define se second
#define ps(a) push_back(a)
#define pb(a) pop_back(a)
#define sc scanf
#define vc vector
#define pa pair<ll, ll>
#define ll long long
#define lb lower_bound
#define ub upper_bound
#define all(a) a.begin(), a.end()
#define llmax LLONG_MAX/2
#define llmin -LLONG_MAX/2
using namespace std;
#define mn 101000
#define pa pair<ll, ll>
#define ld long double 
ll vis[mn], can[mn];
vc<ll> edg[mn];
void dfs(ll u){
    vis[u]=1;
    fore(v, edg[u]){
        can[v]=1;
        if(!vis[v]) dfs(v);
    }
}
int main(){
    ll n, m;cin >> n>> m;
    loop(i, 0, m){
        ll a, b;cin >> a >>b;
        edg[b].ps(a);
    }
    dfs(1);
    if(edg[1].size()==0) can[1]=1;
    loop(i, 1, n+1) cout << can[i];cout << endl;
}

Compilation message (stderr)

wand.cpp: In function 'int main()':
wand.cpp:2:23: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    2 | #define loop(i, a, b) for(long long i=a;i<b;i++)
      |                       ^~~
wand.cpp:39:5: note: in expansion of macro 'loop'
   39 |     loop(i, 1, n+1) cout << can[i];cout << endl;
      |     ^~~~
wand.cpp:39:36: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   39 |     loop(i, 1, n+1) cout << can[i];cout << endl;
      |                                    ^~~~

• Subtask 1: 70 / 70