zstu新生赛
4238: Save the Princess
博弈题,直接判断n奇偶以及k的位置是否是边界。
#include
#include
#include
using namespace std;
int main(){int T,n,k;cin>>T;while(T--){cin>>n>>k;if(k!=1&&k!=n+1) puts(n%2?"BH":"LYF");if(k==1||k==n+1) puts("LYF");}return 0;
}
4240: 极差
#include
using namespace std;
int main(){int T;cin>>T;while(T--){int n,x;scanf("%d",&n);int mx=-1,mn=INT_MAX;cout<for(int i=1;i<=n;i++){scanf("%d",&x);if(mxif(mn>x) mn=x;}printf("%d\n",mx-mn);}return 0;
}
4243: 牛吃草
这道题奇怪的被卡,由于比赛时没有直接出结果,没发现错误。结束了拍了一下,发现前半部分写的有问题。。。。
#include
#include
#include
using namespace std;
const double pi = acos(-1.0);
const double eps = 1e-8;
double get(long long x0,long long y0,long long x1,long long y1) {return (double)sqrt( (x1-x0)*(x1-x0)*1.0 + (y1-y0)*(y1- y0)*1.0 );
}
int dsgn(double x){return x < -eps ? -1 : x > eps;}
double area(long long x0,long long y0,double r1,long long x1,long long y1,double r2){double d = get(x0,y0,x1,y1);double a1=acos((r1*r1+d*d-r2*r2)/(2.0*r1*d));double a2=acos((r2*r2+d*d-r1*r1)/(2.0*r2*d));return (a1*r1*r1+a2*r2*r2-r1*d*sin(a1));
}
double Area(double r, double R, double l){if(dsgn(l - r - R) >= 0) return 0;else if(dsgn(l - fabs(r - R)) <= 0){if(r > R) r = R;return pi * r * r;}double a = acos((l * l + r * r - R * R) / (2 * l * r));double b = acos((l * l + R * R - r * r) / (2 * l * R));double s1 = a * r * r, s2 = b * R * R;double S1 = r * r * sin(a) * cos(a), S2 = R * R * sin(b) * cos(b);return s1 + s2 - S1 - S2;
}
int main(){freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);long long T;cin>>T;while(T--){long long x0,y0,x1,y1,r;cin>>x0>>y0>>x1>>y1>>r;double s1 = pi * r * r;double dist = get(x0,y0,x1,y1);double s2 = s1 / 2.0;double r_=sqrt(s2/pi);double lr_=max(0.0,dist-r),rr_=1e5,ansr;while(dsgn(rr_-lr_)>0){double midr_=(lr_+rr_)/2.0;double s_=area(x0,y0,r,x1,y1,midr_);if(dsgn(2.0 * Area(r, midr_, dist) - pi * r * r) < 0){lr_ = midr_+0.000000001;ansr=midr_;}else rr_=midr_-0.000000001;}printf("%.4lf\n",ansr);}return 0;
}
4244: 众数
#include
using namespace std;
int stu[1111];
int ans[1111];
int main(){int T;cin>>T;while(T--){memset(stu,0,sizeof(stu));int n,x;scanf("%d",&n);for(int i=1;i<=n;i++){scanf("%d",&x);stu[x]++; }int mx=0;ans[0]=0;for(int i=0;i<=1000;i++){if(mx0]=1;ans[ans[0]]=i;}else if(mx==stu[i]){ans[0]++;ans[ans[0]]=i;}}for(int i=1;i<=ans[0];i++){if(i-1) printf(" ");printf("%d",ans[i]);}puts("");}return 0;
}
4245: KI的斐波那契
斐波那契,f[n-1]和f[n]表示的恰好是a+b和a的个数,每次去掉最大的,看最后结果情况。
#include
#define LL long long
using namespace std;
LL read(){ LL x=0; char ch=getchar(); while (ch<'0' || ch>'9') ch=getchar(); while (ch>='0' && ch<='9'){ x=x*10+ch-'0'; ch=getchar(); } return x;
}
LL f[99];
bool dfs(LL n,LL m){if(n==2) return m==1;if(n==1) return 1;if(m> f[n-1]) dfs(n-2,m-f[n-1]);else dfs(n-1,m);
}
int main(){LL T,n,m;cin>>T;f[0]=1;f[1]=1;for(int i=2;i<=91;i++) f[i]=f[i-1]+f[i-2];while(T--){n=read();m=read();puts(dfs(n,m)?"a":"b");}return 0;
}
吐槽一下,比赛时没有出评测结果,结果就GG了,赛后写的。
等待补充。。。
本文来自互联网用户投稿,文章观点仅代表作者本人,不代表本站立场,不承担相关法律责任。如若转载,请注明出处。 如若内容造成侵权/违法违规/事实不符,请点击【内容举报】进行投诉反馈!
