Submission #522087

#	Time	Username	Problem	Language	Result	Execution time	Memory
522087		idas	Stations (IOI20_stations)	C++17	0 / 100	3151 ms	2097156 KiB

stations

#include <bits/stdc++.h>
#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr)
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)
#define TSTS int ttt; cin >> ttt; while(ttt--) solve()
#define all(x) (x).begin(), (x).end()
#define le(vec) vec[vec.size()-1]
#define sz(x) ((int)((x).size()))
#define pb push_back
#define s second
#define f first

using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef map<int, int> mii;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pdd;

const int INF=1e9, MOD=1e9+7, mod=998244353;
const ll LINF=1e18;

void setIO()
{
    FAST_IO;
}

void setIO(string s)
{
    FAST_IO;
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

const int N=1e3+10;
int c[N], id;
vi ad[N];

void dfs(int u, int pst)
{
    c[u]=id; id--;
    for(auto x : ad[u]){
        if(x==pst) continue;
        dfs(x, u);
    }
}

vi label(int n, int k, vi u, vi v)
{
    FOR(i, 0, n-1)
    {
        ad[u[i]].pb(v[i]);
        ad[v[i]].pb(u[i]);
    }
    id=n-1;
    dfs(0, -1);
    vi ans(n);
    FOR(i, 0, n) ans[i]=c[i];
    return ans;
}

int find_next_station(int s, int t, vi c)
{
    if(s<t) return le(c);
    for(auto x : c){
        if(x>=t) return x;
    }
}

Compilation message (stderr)

stations.cpp: In function 'void setIO(std::string)':
stations.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stations.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stations.cpp: In function 'int find_next_station(int, int, vi)':
stations.cpp:69:1: warning: control reaches end of non-void function [-Wreturn-type]
   69 | }
      | ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61