Submission #420253

#TimeUsernameProblemLanguageResultExecution timeMemory
420253cpp219Star triangles (IZhO11_triangle)C++14
0 / 100
1 ms204 KiB
#pragma GCC optimization "O2" #pragma GCC optimization "unroll-loop" #pragma GCC target ("avx2") #include <bits/stdc++.h> #define ll long long #define ld long double #define fs first #define sc second using namespace std; const ll N = 3e5 + 9; const ll mod = 1e9 + 7; typedef pair<ll,ll> LL; map<ll,ll> mpx,mpy; ll n,ans; LL a[N]; int main(){ ios_base::sync_with_stdio(0); cin.tie(0), cout.tie(0); #define task "test" if (fopen(task".inp", "r")){ freopen(task".inp", "r", stdin); //freopen(task".out", "w", stdout); } cin>>n; for (ll i = 1;i <= n;i++){ cin>>a[i].fs>>a[i].sc; mpx[a[i].fs]++; mpy[a[i].sc]++; } for (ll i = 1;i <= n;i++){ ll p = mpx[a[i].fs] - 1,q = mpy[a[i].sc] - 1; ans -= p*q; } cout<<ans; }

Compilation message (stderr)

triangle.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
triangle.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
triangle.cpp: In function 'int main()':
triangle.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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