Submission #140456

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
140456	2019-08-03 07:21:29	evpipis	One-Way Streets (CEOI17_oneway)	C++11	100 / 100	104 ms	15996 KiB

oneway

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#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define mp make_pair
#define pb push_back
typedef pair<int, int> ii;
const int len = 1e5+5;
int out[len], num[len], low[len], par[len], sum[len], cnt;
ii edge[len];
vector<ii> adj[len];
void dfs(int u){
    num[u] = low[u] = ++cnt;
    for (int j = 0; j < adj[u].size(); j++){
        ii v = adj[u][j];
        if (!num[v.fi]){
            par[v.fi] = v.se;
            dfs(v.fi);
            if (low[v.fi] > num[u]){
                if (sum[v.fi] > 0)
                    out[v.se] = edge[v.se].fi==v.fi?1:-1;
                if (sum[v.fi] < 0)
                    out[v.se] = edge[v.se].fi==u?1:-1;
            }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

oneway.cpp: In function 'void dfs(int)':
oneway.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int j = 0; j < adj[u].size(); j++){
                     ~~^~~~~~~~~~~~~~~
oneway.cpp: In function 'int main()':
oneway.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
oneway.cpp:45:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
oneway.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &q);
     ~~~~~^~~~~~~~~~
oneway.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

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