Submission #375624

#	Time	Username	Problem	Language	Result	Execution time	Memory
375624		Alex_tz307	Game (IOI14_game)	C++17	Compilation error	0 ms	0 KiB

game

#include <bits/stdc++.h>

const int NMAX = 1505;
int N, p[NMAX], sz[NMAX], cnt[NMAX][NMAX];

int get(int x) {
    if(x == p[x])
        return x;
    return p[x] = get(p[x]);
}

void unite(int u, int v) {
    if(sz[u] < sz[v])
        swap(u, v);
    for(int k = 1; k <= N; ++k) 
        cnt[u][k] += cnt[v][k], cnt[k][u] += cnt[v][k];
    p[v] = u;
}

void initialize(int n) {
    N = n;
    for(int i = 1; i <= N; ++i) {
        p[i] = i;
        sz[i] = 1;
        for(int j = 1; j <= N; ++j)
            if(i != j)
                cnt[i][j] = 1;
    }
}

int hasEdge(int u, int v) {
    ++u, ++v;
    u = get(u);
    v = get(v);
    if(u == v)
        return 0;
    if(cnt[u][v] > 1) {
        --cnt[u][v], --cnt[v][u];
        return 0;
    }
    unite(x, y);
    return 1;
}

Compilation message (stderr)

game.cpp: In function 'void unite(int, int)':
game.cpp:14:9: error: 'swap' was not declared in this scope
   14 |         swap(u, v);
      |         ^~~~
game.cpp:14:9: note: suggested alternatives:
In file included from /usr/include/c++/9/regex:62,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:110,
                 from game.cpp:1:
/usr/include/c++/9/bits/regex.h:2029:5: note:   'std::__cxx11::swap'
 2029 |     swap(match_results<_Bi_iter, _Alloc>& __lhs,
      |     ^~~~
In file included from /usr/include/c++/9/bits/stl_pair.h:59,
                 from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/specfun.h:45,
                 from /usr/include/c++/9/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:41,
                 from game.cpp:1:
/usr/include/c++/9/bits/move.h:182:5: note:   'std::swap'
  182 |     swap(_Tp& __a, _Tp& __b)
      |     ^~~~
/usr/include/c++/9/bits/move.h:182:5: note:   'std::swap'
In file included from /usr/include/c++/9/exception:143,
                 from /usr/include/c++/9/ios:39,
                 from /usr/include/c++/9/istream:38,
                 from /usr/include/c++/9/sstream:38,
                 from /usr/include/c++/9/complex:45,
                 from /usr/include/c++/9/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:54,
                 from game.cpp:1:
/usr/include/c++/9/bits/exception_ptr.h:166:5: note:   'std::__exception_ptr::swap'
  166 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |     ^~~~
In file included from /usr/include/c++/9/filesystem:37,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:129,
                 from game.cpp:1:
/usr/include/c++/9/bits/fs_path.h:611:15: note:   'std::filesystem::__cxx11::swap'
  611 |   inline void swap(path& __lhs, path& __rhs) noexcept { __lhs.swap(__rhs); }
      |               ^~~~
game.cpp: In function 'int hasEdge(int, int)':
game.cpp:41:11: error: 'x' was not declared in this scope
   41 |     unite(x, y);
      |           ^
game.cpp:41:14: error: 'y' was not declared in this scope
   41 |     unite(x, y);
      |              ^