Submission #798216

#	Time	Username	Problem	Language	Result	Execution time	Memory
798216		alittlemiddle	Star triangles (IZhO11_triangle)	C++14	Compilation error	0 ms	0 KiB

triangle

#include <bits/stdc++.h>
#define el '\n'
#define fi first
#define sc second
#define int ll
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
const int mod=1e9+7;
const int N=3e5+11;
int n, x[N],y[N], ans;
map<int, int> mp1, mp2;
void sol()
{
    memset(mp1, -1, sizeof mp1);
    memset(mp2, -1, sizeof mp2);
    cin >> n;
    for(int i=1;i<=n; i++)
    {
        cin >> x[i] >> y[i];
        mp1[x[i]]++;
        mp2[y[i]]++;
    }
    for(int i=1; i<=n; i++) ans+=mp1[x[i]]*mp2[y[i]];
    cout << ans;
}
signed main()
{
//    freopen("divisor.INP", "r", stdin);
//    freopen("divisor.OUT", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t=1;
    //cin >> t;
    while(t--)
    {
        sol();
    }
}

Compilation message (stderr)

triangle.cpp: In function 'void sol()':
triangle.cpp:18:12: error: cannot convert 'std::map<long long int, long long int>' to 'void*'
   18 |     memset(mp1, -1, sizeof mp1);
      |            ^~~
      |            |
      |            std::map<long long int, long long int>
In file included from /usr/include/features.h:461,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/c++config.h:518,
                 from /usr/include/c++/10/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from triangle.cpp:1:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:59:1: note:   initializing argument 1 of 'void* memset(void*, int, size_t)'
   59 | __NTH (memset (void *__dest, int __ch, size_t __len))
      | ^~~~~
triangle.cpp:19:12: error: cannot convert 'std::map<long long int, long long int>' to 'void*'
   19 |     memset(mp2, -1, sizeof mp2);
      |            ^~~
      |            |
      |            std::map<long long int, long long int>
In file included from /usr/include/features.h:461,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/c++config.h:518,
                 from /usr/include/c++/10/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from triangle.cpp:1:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:59:1: note:   initializing argument 1 of 'void* memset(void*, int, size_t)'
   59 | __NTH (memset (void *__dest, int __ch, size_t __len))
      | ^~~~~