Submission #44159

#	Time	Username	Problem	Language	Result	Execution time	Memory
44159		ShadowLight	Zagonetka (COI18_zagonetka)	C++14	Compilation error	0 ms	0 KiB

zagonetka

#include <bits/stdc++.h>
#define ll long long

#define TASKNAME ""

using namespace std;

const int INF = 1e9 + 7;
const int MAXN = 1e6 + 7;
const double EPS = 1e-8;

#ifdef MY
    #define cout ssout
    #define cin ssin
#endif

vector <vector <int> > gr;
vector <vector <int> > rev_gr;

int n;
vector <int> p;
vector <int> pos;

stringstream ssout, ssin;

vector <pair <int, int> > edges;

void inter() {
    string s;
    ssout >> s;
    vector <int> q(n);
    for (int i = 0; i < n; i++) {
        ssout >> q[i];
        printf("%d ", q[i]);
    }
    printf("\n");
    for (auto p : edges) {
        printf("%d %d\n", q[p.first], q[p.second]);
        if (q[p.first] > q[p.second]) {
            cin << 0;
            cerr << "Inter3 0\n";
            return;
        }
    }
    cin << 1;
    cerr << "Inter3 1\n";
}

void query(vector <int> &a) {
    cout << "query ";
    for (int x : a) {
        cout << x + 1 << " ";
    }
    cout << endl;
}


vector <bool> used;

void dfs(int v) {
    if (used[v]) return;
    used[v] = 1;
    for (int u : rev_gr[v]) {
        dfs(u);
    }
}

vector <int> lvls;
vector <bool> used1;

int main() {
    #ifdef MY
        //freopen("input.txt", "r", stdin);
        //freopen("output.txt", "w", stdout);
    #else
        //freopen(TASKNAME".in", "r", stdin);
        //freopen(TASKNAME".out", "w", stdout);
    #endif // MY
    scanf("%d", &n);
    p.resize(n);
    pos.resize(n, 0);
    for (int i = 0; i < n; i++) {
        scanf("%d", &p[i]);
        p[i]--;
        pos[p[i]] = i;
    }
    int m;
    scanf("%d", &m);
    for (int i = 0; i < m; i++) {
        int v, u;
        scanf("%d%d", &v, &u);
        v--, u--;
        edges.push_back({v, u});
    }
    gr.resize(n);
    rev_gr.resize(n);
    int iter = 0;
    for (int i = n - 1; i >= 0; i--) {
        used.assign(n, 0);
        for (int j = i + 1; j < n; j++) {
            if (used[j]) {
                gr[j].push_back(i);
                rev_gr[i].push_back(j);
                iter++;
                continue;
            }
            auto q = p;
            int v = j;
            while (gr[v].size()) {
                int u = gr[v][0];
                swap(q[pos[v]], q[pos[u]]);
                v = u;
            }
            swap(q[pos[v]], q[pos[i]]);
            v = i;
            while (rev_gr[v].size()) {
                int u = rev_gr[v].back();
                if (u > j) break;
                swap(q[pos[v]], q[pos[u]]);
                v = u;
            }
            query(q);
            inter();
            int ans;
            //cerr << "Inter " << cin.str() << endl;
            cin >> ans;
            cin.clear();
            //cerr << "Inter2 " << ans << endl;
            if (!ans) {
                gr[j].push_back(i);
                rev_gr[i].push_back(j);
                printf("%d %d\n", i, j);
                dfs(j);
                iter++;
            }
        }
    }
    cout << "end" << endl;
    vector <int> resa(n), resb(n);
    set <int> q;
    vector <int> cnt(n, 0);
    for (int i = 0; i < n; i++) {
        cnt[i] = gr[i].size();
        if (!cnt[i]) {
            q.insert(pos[i]);
        }
    }
    int now = 0;
    while (!q.empty()) {
        int v = *q.begin();
        q.erase(v);
        resa[v] = now++;
        for (int u : rev_gr[p[v]]) {
            cnt[u]--;
            if (!cnt[u]) {
                q.insert(pos[u]);
            }
        }
    }
    for (int i = 0; i < n; i++) {
        cnt[i] = gr[i].size();
        if (!cnt[i]) {
            q.insert(pos[i]);
        }
    }
    now = 0;
    while (!q.empty()) {
        int v = *q.rbegin();
        q.erase(v);
        resb[v] = now++;
        for (int u : rev_gr[p[v]]) {
            cnt[u]--;
            if (!cnt[u]) {
                q.insert(pos[u]);
            }
        }
    }
    for (int x : resa) {
        printf("%d ", x + 1);
    }
    printf("\n");
    cout << endl;
    for (int x : resb) {
        printf("%d ", x + 1);
    }
    printf("\n");
    cout << endl;
}

Compilation message (stderr)

zagonetka.cpp: In function 'void inter()':
zagonetka.cpp:40:17: error: no match for 'operator<<' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'int')
             cin << 0;
             ~~~~^~~~
zagonetka.cpp:40:17: note: candidate: operator<<(int, int) <built-in>
zagonetka.cpp:40:17: note:   no known conversion for argument 1 from 'std::istream {aka std::basic_istream<char>}' to 'int'
In file included from /usr/include/c++/7/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:110,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/regex.h:1483:5: note: candidate: template<class _Ch_type, class _Ch_traits, class _Bi_iter> std::basic_ostream<_CharT, _Traits>& std::__cxx11::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::sub_match<_Bi_iter>&)
     operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/regex.h:1483:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:3160:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::piecewise_linear_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:3160:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2944:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::piecewise_constant_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2944:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2734:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::discrete_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2734:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2275:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::student_t_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2275:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2200:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::fisher_f_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2200:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2036:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::chi_squared_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2036:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1963:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::lognormal_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1963:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1667:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::binomial_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1667:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1400:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::poisson_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1400:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1195:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::negative_binomial_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1195:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:831:5: note: candidate: template<class _RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::shuffle_order_engine<_RandomNumberEngine, __k>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:831:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:702:5: note: candidate: template<class _RandomNumberEngine, long unsigned int __p, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::discard_block_engine<_RandomNumberEngine, __p, __r>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:702:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:632:5: note: candidate: template<class _UIntType, long unsigned int __w, long unsigned int __s, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::subtract_with_carry_engine<_UIntType, __w, __s, __r>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:632:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:156:5: note: candidate: template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::linear_congruential_engine<_UIntType, __a, __c, __m>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:156:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2598:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::extreme_value_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2598:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2522:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::weibull_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2522:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1731:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::exponential_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1731:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2444:5: note: candidate: template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::gamma_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2444:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1080:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::geometric_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1080:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:1898:5: note: candidate: template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::normal_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:1898:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:998:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::bernoulli_distribution&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:998:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:2123:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::cauchy_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/7/bits/random.tcc:2123:5: note:   template argument deduction/substitution failed:
zagonetka.cpp:40:20: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
             cin << 0;
                    ^
In file included from /usr/include/c++/7/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:108,
                 from zagonetka.cpp:1:
/usr/include/c++/7/bits/random.tcc:936:5: note: candidate: template<class _