Submission #766168

#	Time	Username	Problem	Language	Result	Execution time	Memory
766168		keta_tsimakuridze	Joker (BOI20_joker)	C++14	Compilation error	0 ms	0 KiB

Joker

#include<bits/stdc++.h>
#define f first
#define s second
//#define int long long
#define pii pair<int,int>
using namespace std;
const int N = 2e5 + 5, mod = 1e9 + 7; // !
int t, p[N], up[N], sz[N], ans[N], odd = 0;
vector<int> V[N];
pair<int,int> e[N];
stack<int> st;
pair<int,int> find(int u) {
    if(p[u] == u) return {u, 0};
    pii P = find(p[u]);
    P.s ^= up[u];
    return P;
}
void merge(int u, int v) {
    pii U = find(u), V = find(v);
    if(sz[U.f] < sz[V.f]) swap(U, V);
    if(U.f != V.f) {
        st.push(V.f);
        p[V.f] = U.f;
        sz[U.f] += sz[V.f];
        up[V.f] = (U.s != V.s ? 0 : 1);
        return;
    }
    if(U.s == V.s) ++odd, st.push(-1);
}
void rollback(int X) {
    while(st.size() > X) {
        int x = st.top();
        st.pop();
        if(x == -1) --odd;
        else sz[p[x]] -= sz[x], p[x] = x, up[x] = 0;
    }
}
void solve(int l, int r, int L, int R) {
    int mid = (l + r) / 2;
    int I = st.size();
    for(int i = l; i <= mid; i++) {
        merge(e[i].f, e[i].s);
    }
    int I2 = st.size();
    int opt = R;
    while(opt && !odd) {
        --opt;
        if(!opt) break;
        merge(e[opt].f, e[opt].s);

    }
    ans[mid] = opt;
    rollback(I2);
    if(mid + 1 <= r) solve(mid + 1, r, opt, R);

    rollback(I);
    for(int i = max(1ll, opt); i < R; i++) merge(e[i].f, e[i].s);
    if(l < mid) solve(l, mid - 1, L, opt);
    rollback(I);

}
main(){
    ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    int n, m, q;
    cin >> n >> m >> q;
    for(int i = 1; i <= n; i++) p[i] = i, sz[i] = 1;

    for(int i = 1; i <= m; i++) cin >> e[i].f >> e[i].s;

    e[0] = {0, 1};
    solve(0, m, 0, m + 1);
//    for(int i = 1; i <= m; i++) cout << ans[i] << " "; cout << endl;
    for(int i = 1; i <= q; i++) {
        int l, r;
        cin >> l >> r;
        cout << (ans[l - 1] > r ? "YES\n" : "NO\n");
    }
 }

Compilation message (stderr)

Joker.cpp: In function 'void rollback(int)':
Joker.cpp:31:21: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   31 |     while(st.size() > X) {
      |           ~~~~~~~~~~^~~
Joker.cpp: In function 'void solve(int, int, int, int)':
Joker.cpp:57:29: error: no matching function for call to 'max(long long int, int&)'
   57 |     for(int i = max(1ll, opt); i < R; i++) merge(e[i].f, e[i].s);
      |                             ^
In file included from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Joker.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:254:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  254 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:254:5: note:   template argument deduction/substitution failed:
Joker.cpp:57:29: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   57 |     for(int i = max(1ll, opt); i < R; i++) merge(e[i].f, e[i].s);
      |                             ^
In file included from /usr/include/c++/10/bits/char_traits.h:39,
                 from /usr/include/c++/10/ios:40,
                 from /usr/include/c++/10/istream:38,
                 from /usr/include/c++/10/sstream:38,
                 from /usr/include/c++/10/complex:45,
                 from /usr/include/c++/10/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54,
                 from Joker.cpp:1:
/usr/include/c++/10/bits/stl_algobase.h:300:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  300 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algobase.h:300:5: note:   template argument deduction/substitution failed:
Joker.cpp:57:29: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   57 |     for(int i = max(1ll, opt); i < R; i++) merge(e[i].f, e[i].s);
      |                             ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from Joker.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3480:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)'
 3480 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3480:5: note:   template argument deduction/substitution failed:
Joker.cpp:57:29: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   57 |     for(int i = max(1ll, opt); i < R; i++) merge(e[i].f, e[i].s);
      |                             ^
In file included from /usr/include/c++/10/algorithm:62,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from Joker.cpp:1:
/usr/include/c++/10/bits/stl_algo.h:3486:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3486 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/10/bits/stl_algo.h:3486:5: note:   template argument deduction/substitution failed:
Joker.cpp:57:29: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   57 |     for(int i = max(1ll, opt); i < R; i++) merge(e[i].f, e[i].s);
      |                             ^
Joker.cpp: At global scope:
Joker.cpp:62:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   62 | main(){
      | ^~~~