제출 #594543

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
594543		snasibov05	기지국 (IOI20_stations)	C++14	컴파일 에러	0 ms	0 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

int tm = 0;

void dfs(int cur, int pr, vector<int>& tin, vector<int>& tout, vector<int>& d, vector<vector<int>>& ed) {

    tin[cur] = tm++;
    d[cur] = d[pr] + 1;
    for (auto to : ed[cur]) {
        if (to == pr) continue;
        dfs(to, cur, tin, tout, d, ed);
    }
    tout[cur] = tm++;

}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {

    vector<vector<int>> ed(n);
    for (int i = 0; i < n-1; ++i) {
        ed[u[i]].push_back(v[i]);
        ed[v[i]].push_back(u[i]);
    }

    vector<int> d(n), tin(n), tout(n);
    tm = 0, d[0] = -1;
    dfs(0, 0, tin, tout, d, ed);

    vector<int> label(n);
    for (int i = 0; i < n; ++i){
        if (d[i] % 2 == 0) label[i] = tin[i];
        else label[i] = tout[i];
    }

    return label;
}

int find_next_station(int s, int t, vector<int> c) {

    sort(c.begin(), c.end());
    if (s < c[0]){
        int prev = s;
        for (int i = 0; i < c.size() - 1; ++i){
            if (prev <= t && t <= c[i]) return c[i];
            prev = c[i];
        }
        return c.back();
    } else{
        int prev = s;
        for (int i = c.size() - 1; i > 0; --i){
            if (c[i] <= t && t <= prev) return c[i];
            prev = c[i];
        }
        return c[0];
    }

}

컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In function 'void dfs(int, int, std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<std::vector<int> >&)':
stations.cpp:10:16: error: reference to 'tm' is ambiguous
   10 |     tin[cur] = tm++;
      |                ^~
In file included from /usr/include/time.h:39,
                 from /usr/include/c++/10/ctime:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:49,
                 from stations.cpp:2:
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h:7:8: note: candidates are: 'struct tm'
    7 | struct tm
      |        ^~
stations.cpp:6:5: note:                 'int tm'
    6 | int tm = 0;
      |     ^~
stations.cpp:16:17: error: reference to 'tm' is ambiguous
   16 |     tout[cur] = tm++;
      |                 ^~
In file included from /usr/include/time.h:39,
                 from /usr/include/c++/10/ctime:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:49,
                 from stations.cpp:2:
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h:7:8: note: candidates are: 'struct tm'
    7 | struct tm
      |        ^~
stations.cpp:6:5: note:                 'int tm'
    6 | int tm = 0;
      |     ^~
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:29:5: error: reference to 'tm' is ambiguous
   29 |     tm = 0, d[0] = -1;
      |     ^~
In file included from /usr/include/time.h:39,
                 from /usr/include/c++/10/ctime:42,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:49,
                 from stations.cpp:2:
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h:7:8: note: candidates are: 'struct tm'
    7 | struct tm
      |        ^~
stations.cpp:6:5: note:                 'int tm'
    6 | int tm = 0;
      |     ^~
stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:46:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |         for (int i = 0; i < c.size() - 1; ++i){
      |                         ~~^~~~~~~~~~~~~~