Submission #313271

#	Time	Username	Problem	Language	Result	Execution time	Memory
313271		anakib1	Aliens (IOI16_aliens)	C++17	Compilation error	0 ms	0 KiB

aliens

//나는 가상 소녀들에게 큰 호감이 있습니다.

#include <iostream>
#include <cmath>
#include <algorithm>
#include <stdio.h>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
#include <bitset>
#include <map>
#include <chrono>
#include <functional>
#include <unordered_set>
#include <unordered_map>
#include <numeric>
#include <queue>
#include <ctime>
#include <stack>
#include <set>
#include <list>
#include <deque>
#include <iomanip>
#include <sstream>
#include <fstream>
#include <stdarg.h>
#include <utility>

using namespace std;

#define pb push_back
#define mp make_pair
#define ll long long
#define ull unisgned long long
#define ld long double
#define all(a) a.begin(), a.end()
#define SORT(a) sort(all(a))
#define pii pair<int, int>
#define tii triple<int, int, int>
#define e 1e-7
#define PI acos(-1)
#define sz(a) (int)(a.size())
#define inf 1e17
#define vi vector<int>
#define F first
#define S second
#define rng(x) for(int _ = 0; _ < (x); _++)
#define rngi(i, x) for(int i = 0; i < (x); i++)
#define rngsi(s, i, x) for(int i = (s); i <(x); i++)
#define problem "a"

template<typename A, typename B, typename C>
struct triple {
    A X;
    B Y;
    C Z;
    triple(A a = 0, B b = 0, C c = 0) :X(a), Y(b), Z(c) {}
};
template<typename A, typename B, typename C>
triple<A, B, C> make_triple(A a = 0, B b = 0, C c = 0) {
    return triple<A, B, C>(a, b, c);
}
template<typename A, typename B, typename C>
bool operator<(const triple<A, B, C>& a, const triple<A, B, C>& b) {
    if (a.X != b.X)
        return a.X < b.X;
    if (a.Y != b.Y)
        return a.Y < b.Y;
    return a.Z < b.Z;
}
template<typename T, typename SS>
ostream& operator<<(ostream& ofs, const pair<T, SS>& p) {
    ofs << "( " << p.F << " , " << p.S << " )";
    return ofs;
}
template<typename T>
void print(T a) {
    for (auto i : a)
        cout << i << ' ';
    cout << '\n';
}
template<typename T>
T max(T a, T b, T c) {
    return max(a, max(b, c));
}
template<typename T>
T min(T a, T b, T c) {
    return min(a, min(b, c));
}
template<typename T, typename D>
D min(T a) {
    return *min_element(all(a));
}
template<typename T, typename D>
D max(T a) {
    return *max_element(all(a));
}
struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
ll f[505][505];
int d[505][505];
long long take_photos(int n, int m, int k, std::vector<int> r, std::vector<int> c) {
    vector<pair<ll, ll> > a;
    rngi(i, n) a.push_back({ min(r[i], c[i]), max(r[i], c[i]) });
    sort(all(a), [&](pii &x, pii &y) {return x.first < y.first || (x.first == y.first && x.second > y.second); });
    vector<pair<ll, ll> > b;
    rngi(i, n)  if (!sz(b) || b.back().second < a[i].second) b.push_back(a[i]);
    n = sz(b);
    rngi(i, n + 1) rngi(j, k + 1) f[i][j] = inf;
    rngi(i, k + 1) f[0][i] = 0;
    auto sq = [&](int x)->ll {return x * 1LL * x; };
    for(int j = 1; j <= k; j++)
        for (int i = n; i >= 1; i--) {
            int l = (j ? d[i][j - 1] : 0), u = (i < n ? d[i + 1][j] : i - 1);
            auto fx = [&](int t) -> ll{
                return f[t][j - 1] + sq(b[i - 1].second - b[t].first + 1) - sq(max(0LL, (t ? (b[t - 1].second - b[t].first + 1) : 0LL)));
            };
            int pos = l;
            for (int t = l; t <= u; t++)  if (fx(pos) >= fx(t)) pos = t;
            d[i][j] = pos;
            f[i][j] = fx(pos);
        }
    //for (int i = 1; i <= n; i++) for (int j = 1; j <= k; j++) rngi(t, i)  f[i][j] = min(f[i][j], );
    return f[n][k];
}

signed main() {
    int n, m, k;
    scanf("%d %d %d", &n, &m, &k);
    std::vector<int> r(n), c(n);
    for (int i = 0; i < n; i++) {
        scanf("%d %d", &r[i], &c[i]);
    }
    long long ans = take_photos(n, m, k, r, c);


    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/predefined_ops.h: In instantiation of 'constexpr bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Iterator2 = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>]':
/usr/include/c++/9/bits/stl_algo.h:81:17:   required from 'void std::__move_median_to_first(_Iterator, _Iterator, _Iterator, _Iterator, _Compare) [with _Iterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1920:34:   required from '_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1952:38:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1967:25:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:4899:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>]'
aliens.cpp:117:113:   required from here
/usr/include/c++/9/bits/predefined_ops.h:143:18: error: no match for call to '(take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>) (std::pair<long long int, long long int>&, std::pair<long long int, long long int>&)'
  143 |         { return bool(_M_comp(*__it1, *__it2)); }
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
aliens.cpp:117:18: note: candidate: 'take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>' <near match>
  117 |     sort(all(a), [&](pii &x, pii &y) {return x.first < y.first || (x.first == y.first && x.second > y.second); });
      |                  ^
aliens.cpp:117:18: note:   conversion of argument 2 would be ill-formed:
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/predefined_ops.h:143:18: error: cannot bind non-const lvalue reference of type 'std::pair<int, int>&' to an rvalue of type 'std::pair<int, int>'
  143 |         { return bool(_M_comp(*__it1, *__it2)); }
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/stl_pair.h:291:19: note:   after user-defined conversion: 'constexpr std::pair<_T1, _T2>::pair(const std::pair<_U1, _U2>&) [with _U1 = long long int; _U2 = long long int; typename std::enable_if<(std::_PCC<((! std::is_same<_T1, _U1>::value) || (! std::is_same<_T2, _U2>::value)), _T1, _T2>::_ConstructiblePair<_U1, _U2>() && std::_PCC<((! std::is_same<_T1, _U1>::value) || (! std::is_same<_T2, _U2>::value)), _T1, _T2>::_ImplicitlyConvertiblePair<_U1, _U2>()), bool>::type <anonymous> = true; _T1 = int; _T2 = int]'
  291 |         constexpr pair(const pair<_U1, _U2>& __p)
      |                   ^~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Val_comp_iter<_Compare>::operator()(_Value&, _Iterator) [with _Value = std::pair<long long int, long long int>; _Iterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>]':
/usr/include/c++/9/bits/stl_algo.h:1827:20:   required from 'void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Val_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1854:36:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1884:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1970:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:4899:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>]'
aliens.cpp:117:113:   required from here
/usr/include/c++/9/bits/predefined_ops.h:215:11: error: no match for call to '(take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>) (std::pair<long long int, long long int>&, std::pair<long long int, long long int>&)'
  215 |  { return bool(_M_comp(__val, *__it)); }
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~
aliens.cpp:117:18: note: candidate: 'take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>' <near match>
  117 |     sort(all(a), [&](pii &x, pii &y) {return x.first < y.first || (x.first == y.first && x.second > y.second); });
      |                  ^
aliens.cpp:117:18: note:   conversion of argument 2 would be ill-formed:
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/predefined_ops.h:215:11: error: cannot bind non-const lvalue reference of type 'std::pair<int, int>&' to an rvalue of type 'std::pair<int, int>'
  215 |  { return bool(_M_comp(__val, *__it)); }
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/stl_pair.h:291:19: note:   after user-defined conversion: 'constexpr std::pair<_T1, _T2>::pair(const std::pair<_U1, _U2>&) [with _U1 = long long int; _U2 = long long int; typename std::enable_if<(std::_PCC<((! std::is_same<_T1, _U1>::value) || (! std::is_same<_T2, _U2>::value)), _T1, _T2>::_ConstructiblePair<_U1, _U2>() && std::_PCC<((! std::is_same<_T1, _U1>::value) || (! std::is_same<_T2, _U2>::value)), _T1, _T2>::_ImplicitlyConvertiblePair<_U1, _U2>()), bool>::type <anonymous> = true; _T1 = int; _T2 = int]'
  291 |         constexpr pair(const pair<_U1, _U2>& __p)
      |                   ^~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Value = std::pair<long long int, long long int>; _Compare = take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>]':
/usr/include/c++/9/bits/stl_heap.h:133:48:   required from 'void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Distance = long int; _Tp = std::pair<long long int, long long int>; _Compare = __gnu_cxx::__ops::_Iter_comp_val<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_heap.h:237:23:   required from 'void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Distance = long int; _Tp = std::pair<long long int, long long int>; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_heap.h:342:22:   required from 'void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1671:23:   required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1932:25:   required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1947:27:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:1967:25:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)> >]'
/usr/include/c++/9/bits/stl_algo.h:4899:18:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<std::pair<long long int, long long int>*, std::vector<std::pair<long long int, long long int> > >; _Compare = take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>]'
aliens.cpp:117:113:   required from here
/usr/include/c++/9/bits/predefined_ops.h:177:11: error: no match for call to '(take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>) (std::pair<long long int, long long int>&, std::pair<long long int, long long int>&)'
  177 |  { return bool(_M_comp(*__it, __val)); }
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~
aliens.cpp:117:18: note: candidate: 'take_photos(int, int, int, std::vector<int>, std::vector<int>)::<lambda(std::pair<int, int>&, std::pair<int, int>&)>' <near match>
  117 |     sort(all(a), [&](pii &x, pii &y) {return x.first < y.first || (x.first == y.first && x.second > y.second); });
      |                  ^
aliens.cpp:117:18: note:   conversion of argument 2 would be ill-formed:
In file included from /usr/include/c++/9/bits/stl_algobase.h:71,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/predefined_ops.h:177:11: error: cannot bind non-const lvalue reference of type 'std::pair<int, int>&' to an rvalue of type 'std::pair<int, int>'
  177 |  { return bool(_M_comp(*__it, __val)); }
      |           ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/9/bits/stl_algobase.h:64,
                 from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from aliens.cpp:3:
/usr/include/c++/9/bits/stl_pair.h:291:19: note:   after user-defined conversion: 'constexpr std::pair<_T1, _T2>::pair(const std::pair<_U1, _U2>&) [with _U1 = long long int; _U2 = long long int; typename std::enable_if<(std::_PCC<((! std::is_same<_T1, _U1>::value) || (! std::is_same<_T2, _U2>::value)), _T1, _T2>::_ConstructiblePair<_U1, _U2>() && std::_PCC<((! std::is_same<_T1, _U1>::value) || (! std::is_same<_T2, _U2>::value)), _T1, _T2>::_ImplicitlyConvertiblePair<_U1, _U2>()), bool>::type <anonymous> = true; _T1 = int; _T2 = int]'
  291 |         constexpr pair(const pair<_U1, _U2>& __p)
      |                   ^~~~
aliens.cpp: In function 'int main()':
aliens.cpp:141:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  141 |     scanf("%d %d %d", &n, &m, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
aliens.cpp:144:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  144 |         scanf("%d %d", &r[i], &c[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~