第6章 初等代数（《C++编程与信息学竞赛数学基础》）

T557868 06-06-C01-求平行四边形另一条高

https://www.luogu.com.cn/problem/T557868

#include <bits/stdc++.h> using namespace std; int a,b,h; double ans; int main() { cin>>a>>b>>h; ans=a*h*1.0/b; printf("%.2f",ans); return 0; }

T557869 06-06-C02-海狸

https://www.luogu.com.cn/problem/T557869

#include <bits/stdc++.h> using namespace std; double D,V; double p=3.1415926,a,b,c; int main() { cin>>D>>V; a=D*D*D-6*V*1.0/p; a=cbrt(1.0*a); printf("%.3f",a); return 0; }

T557870 06-06-C03-一元二次方程

https://www.luogu.com.cn/problem/T557870

#include <bits/stdc++.h> using namespace std; int t,m; int gcd(int a,int b) { //a=abs(a),b=abs(b); if(b==0)return a; return gcd(b,a%b); } void solve(){ int a,b,c,de; cin>>a>>b>>c; de=b*b-4*a*c; if(de<0){ cout<<"NO"<<'\n'; return; } int ans01=1; for(int i=2;i*i<=de;i++){ while(de%(i*i)==0){ ans01*=i; de/=i*i; } } int aa=2*a,bb=-b; if(aa<0) { aa=-aa; bb=-bb; } if(de==1){ de=0; bb+=ans01; } int gd1=gcd(abs(bb),aa); int gd2=gcd(ans01,aa); if(de==0){ if(bb%aa==0){ cout<<bb/aa; }else{ cout<<bb/gd1<<"/"<<aa/gd1; } }else{ if(bb!=0){ if(bb%aa==0)cout<<bb/aa; else{ cout<<bb/gd1<<"/"<<aa/gd1; } cout<<"+"; } if(ans01/gd2!=1){ cout<<ans01/gd2<<"*"; } cout<<"sqrt("<<de<<")"; if(aa/gd2!=1)cout<<"/"<<aa/gd2; } cout<<'\n'; } int main() { //int t; cin>>t>>m; while(t--){ solve(); } return 0; }

T557871 06-06-C04-鸡兔同笼问题

https://www.luogu.com.cn/problem/T557871

#include <bits/stdc++.h> using namespace std; int m,n,a,b; int main() { cin>>m>>n; a=2*m-n/2; b=n/2-m; if(a<0||b<0){ cout<<"no answer"; }else{ cout<<a<<" "<<b; } return 0; }

T557872 06-06-C05-Uncore CPU

https://www.luogu.com.cn/problem/T557872

#include <bits/stdc++.h> using namespace std; int m,n,a,b; int main() { cin>>m>>n; a=n-m; b=m-a; cout<<a<<" "<<b; return 0; }

T557873 06-06-C06-百钱百鸡问题

https://www.luogu.com.cn/problem/T557873

#include <bits/stdc++.h> using namespace std; int n,t; int main() { cin>>n; for(int i=0;i<=n;i++){ for(int j=0;j<=n;j++){ if(i+j>n||i*5+j*3>n)break; int k=n-i-j; if(i*5+j*3+k/3==n&&k%3==0){ cout<<i<<" "<<j<<" "<<k<<'\n'; t=1; } } } if(!t){ cout<<"no answer"; } return 0; }

T560511 06-06-D01-不定方程求解

https://www.luogu.com.cn/problem/T560511

#include <bits/stdc++.h> using namespace std; int main() { int a,b,c,ans=0; cin>>a>>b>>c; for(int x=0;;x++){ int y=c-a*x; if(y<0)break; if(y%b==0)ans++; } cout<<ans; return 0; }

【数学基础】14-博弈论基础

https://www.luogu.com.cn/training/675193

https://blog.csdn.net/dllglvzhenfeng/article/details/159690940

【数学基础】08-组合数学

https://www.luogu.com.cn/training/675199

https://blog.csdn.net/dllglvzhenfeng/article/details/156614120

【数学基础】03-初等几何

https://www.luogu.com.cn/training/675204

https://blog.csdn.net/dllglvzhenfeng/article/details/156864234

AtCoder Beginner Contest 331

https://blog.csdn.net/dllglvzhenfeng/article/details/145075673

AtCoder Beginner Contest 332

https://blog.csdn.net/dllglvzhenfeng/article/details/144942807

AtCoder Beginner Contest 333

https://blog.csdn.net/dllglvzhenfeng/article/details/144830390

AtCoder Beginner Contest 334

https://blog.csdn.net/dllglvzhenfeng/article/details/144753054

AtCoder Beginner Contest 335

https://blog.csdn.net/dllglvzhenfeng/article/details/144380673

AtCoder Beginner Contest 336

https://blog.csdn.net/dllglvzhenfeng/article/details/144675455

AtCoder Beginner Contest 337

https://blog.csdn.net/dllglvzhenfeng/article/details/148430037

AtCoder Beginner Contest 338

https://blog.csdn.net/dllglvzhenfeng/article/details/145080646

AtCoder Beginner Contest 339

https://blog.csdn.net/dllglvzhenfeng/article/details/148429543

AtCoder Beginner Contest 340

https://blog.csdn.net/dllglvzhenfeng/article/details/148428947