제출 #585139

#제출 시각아이디문제언어결과실행 시간메모리
585139krit3379Triangles (CEOI18_tri)C++17
15 / 100
2 ms852 KiB
#include<bits/stdc++.h> #include"trilib.h" using namespace std; #pragma GCC optimize("O3,unroll-loops") #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt") #define N 55 int d[N][N][N],c[2],ans; int main(){ int n,i,j,k; n=get_n(); for(i=1;i<=n;i++)for(j=i+1;j<=n;j++)for(k=j+1;k<=n;k++){ if(k==i||k==j)continue; d[i][j][k]=d[j][k][i]=d[k][i][j]=is_clockwise(i,j,k); d[i][k][j]=d[k][j][i]=d[j][i][k]=!d[i][j][k]; } for(i=1;i<=n;i++)for(j=i+1;j<=n;j++){ c[0]=c[1]=0; for(k=1;k<=n;k++){ if(k==i||k==j)continue; c[d[i][j][k]]++; } if(!c[0]||!c[1])ans++; } give_answer(ans); return 0; }
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