Submission #162299

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
162299	2019-11-07 14:05:36	karma	One-Way Streets (CEOI17_oneway)	C++14	100 / 100	138 ms	28184 KiB

oneway

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#include <bits/stdc++.h>
#define pb          emplace_back
#define ll          long long
#define fi          first
#define se          second
#define mp          make_pair
using namespace std;
const int N = int(2e5) + 7;
typedef pair<int, int> pii;
struct TEdge{int u, v; bool del;} e[N];
int low[N], num[N], Time = 0, br[N], lab[N], cnt = 0;
vector<int> ver, a[N];
vector<pii> g[N];
int n, m, u, v, q, c[N], f[N], vis[N];
string s;
void DFS(int u) {
    low[u] = num[u] = ++Time;
    for(int i: a[u]) {
       if(e[i].del) continue;
       e[i].del = 1;
       int v = e[i].u ^ e[i].v ^ u;
       if(!num[v]) {
         int cur = ver.size();
         DFS(v);
         low[u] = min(low[u], low[v]);
         if(low[v] >= num[v]) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

oneway.cpp: In function 'int main()':
oneway.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
oneway.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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