April Fools Day Contest 2023 题解
A Are You a Robot?
print("security")
B Was it Rated?
#include<bits/stdc++.h>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \\For(j,m-1) cout<<a[i][j]<<' ';\\cout<<a[i][m]<<endl; \\}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{int x=0,f=1; char ch=getchar();while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}return x*f;
}
int main()
{
// freopen("B.in","r",stdin);
// freopen(".out","w",stdout);int p=read();puts((p==8||p>11)?"NO":"YES");return 0;
}C Digits
#include<bits/stdc++.h>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \\For(j,m-1) cout<<a[i][j]<<' ';\\cout<<a[i][m]<<endl; \\}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{int x=0,f=1; char ch=getchar();while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}return x*f;
}
string s="314159265358979323846264338327950288419716939937510";
int main()
{
// freopen("C.in","r",stdin);
// freopen(".out","w",stdout);int t=read();int i=0;while(t--) {while(isdigit(!s[i])) ++i;int n=s[i]-'0';ll q=1;while(n--) q*=read();cout<<q<<endl;++i;}return 0;
}D Trivial Conjecture
print("0")
E Not a Geometry Problem
print("0")
F Factorization
分解质因数的神奇网站：http://factordb.com/
#include<bits/stdc++.h>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \\For(j,m-1) cout<<a[i][j]<<' ';\\cout<<a[i][m]<<endl; \\}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{int x=0,f=1; char ch=getchar();while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}return x*f;
}
int main()
{
// freopen("E.in","r",stdin);
// freopen(".out","w",stdout);string s;cin>>s;if(s[0]=='4') cout<<"4201403994187";else cout<<"50232664853522245305416663465797181880457258025569478559027020637689305266652375982874957282186920039740245544313021979167491414627648054421626450903732301970386214502290904360792618559102961459988990211547239113562240204497934713395939288468603720889369473365578339515548699615181802856501740938959";return 0;
}
G Colour Vision
看图猜这是曾经哪场比赛的题
#include <bits/stdc++.h>using namespace std;
using ll = long long;int main(){cin.tie(0)->sync_with_stdio(0);int T; cin >> T;while (T--){int N; cin >> N;string s1, s2; cin >> s1 >> s2;for (char &c : s1){if (c == 'G') c = 'B';}for (char &c : s2){if (c == 'G') c = 'B';}cout << (s1 == s2 ? "YES" : "NO") << '\\n';}
}
I Mountain Climber
观察发现问题为26个小写英文字母在三线上占上中位置和占中下位置的字符的出现是否正好可以构成括号序列
#include<bits/stdc++.h>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define ForkD(i,k,n) for(int i=n;i>=k;i--)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (o<<1)
#define Rson ((o<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,0x3f,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define MEMx(a,b) memset(a,b,sizeof(a));
#define INF (0x3f3f3f3f)
#define F (1000000007)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define vi vector<int>
#define pi pair<int,int>
#define SI(a) ((a).size())
#define Pr(kcase,ans) printf("Case #%d: %lld\\n",kcase,ans);
#define PRi(a,n) For(i,n-1) cout<<a[i]<<' '; cout<<a[n]<<endl;
#define PRi2D(a,n,m) For(i,n) { \\For(j,m-1) cout<<a[i][j]<<' ';\\cout<<a[i][m]<<endl; \\}
#pragma comment(linker, "/STACK:102400000,102400000")
#define ALL(x) (x).begin(),(x).end()
#define gmax(a,b) a=max(a,b);
#define gmin(a,b) a=min(a,b);
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return ((a-b)%F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
inline int read()
{int x=0,f=1; char ch=getchar();while(!isdigit(ch)) {if (ch=='-') f=-1; ch=getchar();}while(isdigit(ch)) { x=x*10+ch-'0'; ch=getchar();}return x*f;
}
int main()
{
// freopen("E.in","r",stdin);
// freopen(".out","w",stdout);vi v1={'g','j','q','p','y'};vi v2={'b','d','f','h','k','l','t'};auto ck=[&](string s) {int m=s.length(),t=0;Rep(i,m) {if(find(ALL(v1),s[i])!=v1.end()) t--;else if(find(ALL(v2),s[i])!=v2.end()) t++;if(t<0) return false;}return t==0;};string s;cin>>s;while(cin>>s) {puts(ck(s)?"YES":"NO");}return 0;
}J Unmysterious Language
please
