Submission #1073471

#	Time	Username	Problem	Language	Result	Execution time	Memory
1073471		blushingecchigirl	Comparing Plants (IOI20_plants)	C++17	Compilation error	0 ms	0 KiB

plants

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back

vector<pair<pair<int, int>> p;

void init(int k, std::vector<int> r) {
    int n = r.size(), x;
    p.resize(n);
    for(int i = 0; i<n; i++) {
        if(r[i]!=r[(i+1)%n]) {
            x = i;
            break;
        }
    }
    int cur = 0, g = 0;

    for(int i = x; i<n+x; i++) {
        p[i%n].second = cur;
        if(r[i%n]) cur--;
        else cur++;
        p[i%n].first.first = p[(i+1)%n].first.second = g;
        if(r[i%n] != r[(i+1)%n]) g++;
    }
    return;
}
int compare_plants(int x, int y) {
    auto a = p[x].first, b = p[y].first;
    if(a.first == b.first || a.first == b.second || a.second == b.first || a.second == b.second) {
        if(p[x].second>p[y].second) return 1;
        return -1;
    }
    return 0;
}

Compilation message (stderr)

plants.cpp:6:26: error: wrong number of template arguments (1, should be 2)
    6 | vector<pair<pair<int, int>> p;
      |                          ^~
In file included from /usr/include/c++/10/bits/stl_algobase.h:64,
                 from /usr/include/c++/10/bits/specfun.h:45,
                 from /usr/include/c++/10/cmath:1927,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:41,
                 from plants.cpp:1:
/usr/include/c++/10/bits/stl_pair.h:211:12: note: provided for 'template<class _T1, class _T2> struct std::pair'
  211 |     struct pair
      |            ^~~~
plants.cpp:6:29: error: template argument 1 is invalid
    6 | vector<pair<pair<int, int>> p;
      |                             ^
plants.cpp:6:29: error: template argument 2 is invalid
plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:10:5: error: 'p' was not declared in this scope
   10 |     p.resize(n);
      |     ^
plants.cpp: In function 'int compare_plants(int, int)':
plants.cpp:29:14: error: 'p' was not declared in this scope
   29 |     auto a = p[x].first, b = p[y].first;
      |              ^
plants.cpp:30:19: error: 'b' was not declared in this scope
   30 |     if(a.first == b.first || a.first == b.second || a.second == b.first || a.second == b.second) {
      |                   ^