2019牛客暑期多校训练营(第一场)

it2022-05-05  123

Problem A 

 

题意:

题解:

C++版本一

 

Problem B 

 

题意:

题解:

C++版本一

 

Problem C 

 

题意:

题解:

C++版本一

 

Problem D 

 

题意:

题解:

C++版本一

 

Problem E 

 

题意:

题解:

C++版本一

 

Problem F Random Point in Triangle

题意:https://ac.nowcoder.com/acm/contest/881/F

题解:数学+计算几何+逻辑推理

C++版本一

题解:

特例:正三角形

取重心、中点、顶点,则期望为(S为三角形面积)

公式:

/* *@Author: STZG *@Language: C++ */ #include <bits/stdc++.h> #include<iostream> #include<algorithm> #include<cstdlib> #include<cstring> #include<cstdio> #include<string> #include<vector> #include<bitset> #include<queue> #include<deque> #include<stack> #include<cmath> #include<list> #include<map> #include<set> //#define DEBUG #define RI register int #define endl "\n" using namespace std; typedef long long ll; //typedef __int128 lll; const int N=100000+10; const int M=100000+10; const int MOD=1e9+7; const double PI = acos(-1.0); const double EXP = 1E-8; const int INF = 0x3f3f3f3f; int t,n,m,k,p,l,r,u,v; int ans,cnt,flag,temp,sum; ll x[3],y[3]; char str; struct node{}; int main() { #ifdef DEBUG freopen("input.in", "r", stdin); //freopen("output.out", "w", stdout); #endif //ios::sync_with_stdio(false); //cin.tie(0); //cout.tie(0); //scanf("%d",&t); while(~scanf("%lld%lld%lld%lld%lld%lld",&x[0],&y[0],&x[1],&y[1],&x[2],&y[2])){ printf("%lld\n",11*labs(x[0]*y[1]-x[1]*y[0]+x[1]*y[2]-x[2]*y[1]+x[2]*y[0]-x[0]*y[2])); } #ifdef DEBUG printf("Time cost : %lf s\n",(double)clock()/CLOCKS_PER_SEC); #endif //cout << "Hello world!" << endl; return 0; }

Problem G 

 

题意:

题解:

C++版本一

 

Problem H 

 

题意:

题解:

C++版本一

 

Problem I

 

题意:

题解:

C++版本一

 

Problem J 

 

题意:

题解:

C++版本一

 

Problem K 

 

题意:

题解:

C++版本一

 

Problem L

 

题意:

题解:

C++版本一

 

Problem M 

 

题意:

题解:

C++版本一

 

Problem N 

 

题意:

题解:

C++版本一


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