Submission #470172

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
470172	2021-09-03 07:30:05	radal	Watermelon (INOI20_watermelon)	C++14	0 / 100	2107 ms	743248 KiB

Main

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#include <bits/stdc++.h>
#define rep(i,l,r) for (int i = l; i < r; i++)
#define pb push_back
#define debug(x) cerr << #x <<  " : " << x << endl;
using namespace std;
typedef long long ll;
const ll N = 1e5+20;
int b[N];
int n,k;
int vis[N],din[N],a[N];
bool fl[N];
vector<int> in[N],out[N];
bool dfs(int v){
    vis[v] = 1;
    for (int u : out[v]){
        if(vis[u] == 1) return 0;
        if (!vis[u] && !dfs(u)) return 0;
    }
    vis[v] = 2;
    return 1;
}
int main(){
    ios :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> k;
    rep(i,1,n+1) cin >> b[i];
    if (b[n] != -1){
        cout << -1;
        return 0;
 
 
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• Subtask 1: 0 / 7
• Subtask 2: 0 / 25
• Subtask 3: 0 / 31
• Subtask 4: 0 / 18
• Subtask 5: 0 / 19