Submission #40424

#	Time	Username	Problem	Language	Result	Execution time	Memory
40424		MladenP	Pipes (CEOI15_pipes)	C++14	Compilation error	0 ms	0 KiB

pipes

#include<bits/stdc++.h>
#define STIZE(x) fprintf(stderr, "STIZE%d\n", x);
#define PRINT(x) fprintf(stderr, "%s = %d\n", #x, x);
#define NL(x) printf("%c", " \n"[(x)]);
#define lld long long
#define pii pair<int,int>
#define pb push_back
#define fi first
#define se second
#define mid (l+r)/2
#define endl '\n'
#define all(a) begin(a),end(a)
#define sz(a) int((a).size())
#define LINF 1000000000000000LL
#define INF 1000000000
#define EPS 1e-9
using namespace std;
#define MAXN 30010
vector<unsigned short> adj[MAXN];
int dsu[MAXN], fup[MAXN], in[MAXN], out[MAXN], timer = 0;
bool pos[MAXN];
map<pair<short, short> > e;
int root(int x) {
    while(x != dsu[x]) {
        dsu[x] = dsu[dsu[x]];
        x = dsu[x];
    }
    return x;
}
void build(int node, int prev) {
    pos[node] = 1;
    in[node] = fup[node] = ++timer;
    for(auto x : adj[node]) {
        if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;

    }
    out[node] = ++timer;
}
bool inSubtree(int x, int y) { //da li je y u subtree x
    return (in[x] < in[y] && out[x] > out[y]);
}
bool backEdge(int x, int y) {
    if(e.count({x, y}) == 0) return 0;
    if(!inSubtree(x, y)) return 0;
    if(root(x) != root(y)) return 0;
    return 1;
}
int build1(int node, int prev) {
    pos[node] = 1;
    for(auto x : adj[node]) {
        if(x != prev && !pos[x]) {
            fup[node] = min(fup[node], build1(x, node));
        }
        if(fup[x] > in[node]) {
            printf("%d %d\n", node, x);
        }
    }
    return fup[node];
}
int main() {
    int n, m; scanf("%d%d", &n, &m);
    for(int i = 1; i <= n; i++) dsu[i] = i;
    for(int i = 0; i < m; i++) {
        unsigned short x, y; scanf("%hu%hu", &x, &y);
        adj[x].pb(y);
        adj[y].pb(x);
        e[{min(x,y), max(x,y)}]++;
        if(root(x) != root(y)) {
            dsu[root(x)] = root(y);
        }
    }
    for(int i = 1; i <= n; i++) if(!pos[i]) build(i, i);
    for(int i = 1; i <= n; i++) {
        for(auto x : adj[i]) {
            if(backEdge(x, i)) {
                fup[i] = min(fup[i], in[x]);
            } else if(backEdge(i, x)) {
                fup[x] = min(in[i], fup[x]);
            }
        }
    }
    for(int i = 1; i <= n; i++) pos[i] = 0;
    for(int i = 1; i <= n; i++) if(!pos[i]) build1(i, i);
    return 0;
}

Compilation message (stderr)

pipes.cpp:22:24: error: wrong number of template arguments (1, should be at least 2)
 map<pair<short, short> > e;
                        ^
In file included from /usr/include/c++/7/map:61:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:81,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_map.h:99:11: note: provided for 'template<class _Key, class _Tp, class _Compare, class _Alloc> class std::map'
     class map
           ^~~
pipes.cpp: In function 'void build(int, int)':
pipes.cpp:34:63: error: no matching function for call to 'min(int&, short unsigned int&)'
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                               ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algobase.h:195:5: note: candidate: template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)
     min(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:195:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:63: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'short unsigned int')
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                               ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algobase.h:243:5: note: candidate: template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)
     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:243:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:63: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'short unsigned int')
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                               ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algo.h:3450:5: note: candidate: template<class _Tp> constexpr _Tp std::min(std::initializer_list<_Tp>)
     min(initializer_list<_Tp> __l)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3450:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:63: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                               ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algo.h:3456:5: note: candidate: template<class _Tp, class _Compare> constexpr _Tp std::min(std::initializer_list<_Tp>, _Compare)
     min(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3456:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:63: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                               ^
pipes.cpp:34:75: error: no matching function for call to 'max(int&, short unsigned int&)'
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                                           ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algobase.h:219:5: note: candidate: template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:75: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'short unsigned int')
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                                           ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/ios:40,
                 from /usr/include/c++/7/istream:38,
                 from /usr/include/c++/7/sstream:38,
                 from /usr/include/c++/7/complex:45,
                 from /usr/include/c++/7/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:52,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algobase.h:265:5: note: candidate: template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:75: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'short unsigned int')
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                                           ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algo.h:3462:5: note: candidate: template<class _Tp> constexpr _Tp std::max(std::initializer_list<_Tp>)
     max(initializer_list<_Tp> __l)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3462:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:75: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                                           ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from pipes.cpp:1:
/usr/include/c++/7/bits/stl_algo.h:3468:5: note: candidate: template<class _Tp, class _Compare> constexpr _Tp std::max(std::initializer_list<_Tp>, _Compare)
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3468:5: note:   template argument deduction/substitution failed:
pipes.cpp:34:75: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                                           ^
pipes.cpp:34:77: error: invalid types 'int[<brace-enclosed initializer list>]' for array subscript
         if(x != prev && !pos[x]) build(x, node), e[{min(node,x),max(node,x)}]--;
                                                                             ^
pipes.cpp: In function 'bool backEdge(int, int)':
pipes.cpp:43:10: error: request for member 'count' in 'e', which is of non-class type 'int'
     if(e.count({x, y}) == 0) return 0;
          ^~~~~
pipes.cpp: In function 'int main()':
pipes.cpp:67:31: error: invalid types 'int[<brace-enclosed initializer list>]' for array subscript
         e[{min(x,y), max(x,y)}]++;
                               ^
pipes.cpp:61:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     int n, m; scanf("%d%d", &n, &m);
               ~~~~~^~~~~~~~~~~~~~~~
pipes.cpp:64:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         unsigned short x, y; scanf("%hu%hu", &x, &y);
                              ~~~~~^~~~~~~~~~~~~~~~~~