Submission #375523

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
375523	2021-03-09 13:38:20	ritul_kr_singh	One-Way Streets (CEOI17_oneway)	C++17	100 / 100	147 ms	22248 KiB

oneway

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define sp << " " <<
#define nl << "\n"
vector<vector<pair<int, int>>> g0, g1;
vector<int> id, low, dfsNum, st;
int dfsTimer = 1;
void tarjan(int u, int parentEdge){
    dfsNum[u] = low[u] = dfsTimer++;
    st.push_back(u);
    for(auto e : g0[u]){
        if(e.second==parentEdge) continue;
        if(!dfsNum[e.first]) tarjan(e.first, e.second);
        low[u] = min(low[u], low[e.first]);
    }
    if(low[u]==dfsNum[u]){
        int v = -1;
        while(v!=u){
            v = st.back(); st.pop_back();
            id[v] = u;
        }
    }
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

oneway.cpp: In function 'void dfs(int)':
oneway.cpp:42:18: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
   42 |         if(dir[v]>0 == (id[edges[e.second].first]==u)) ans[e.second] = -1;
      |            ~~~~~~^~

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40