为什么一个能过，另一个TLE
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- 发布时间2025/6/17 15:04
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被骇客银狼阻止的越权访问保存失败
为什么一个能过，另一个TLE
TLE on #30
#include<bits/stdc++.h>
#include<bits/extc++.h>
namespace fast_IO {
#define IOSIZE 1000000
char ibuf[IOSIZE], obuf[IOSIZE], *p1 = ibuf, *p2 = ibuf, *p3 = obuf;
#define getchar() ((p1==p2)and(p2=(p1=ibuf)+fread(ibuf,1,IOSIZE,stdin),p1==p2)?(EOF):(*p1++))
#define putchar(x) ((p3==obuf+IOSIZE)&&(fwrite(obuf,p3-obuf,1,stdout),p3=obuf),*p3++=x)
#define isdigit(ch) (ch>47&&ch<58)
#define isspace(ch) (ch<33)
template<typename T> inline T read() { T s = 0; int w = 1; char ch; while (ch = getchar(), !isdigit(ch) and (ch != EOF)) if (ch == '-') w = -1; if (ch == EOF) return false; while (isdigit(ch)) s = s * 10 + ch - 48, ch = getchar(); return s * w; }
template<typename T> inline bool read(T &s) { s = 0; int w = 1; char ch; while (ch = getchar(), !isdigit(ch) and (ch != EOF)) if (ch == '-') w = -1; if (ch == EOF) return false; while (isdigit(ch)) s = s * 10 + ch - 48, ch = getchar(); return s *= w, true; }
template<typename T> inline void print(T x) { if (x < 0) putchar('-'), x = -x; if (x > 9) print(x / 10); putchar(x % 10 + 48); }
inline bool read(char &s) { while (s = getchar(), isspace(s)); return true; }
inline bool read(char *s) { char ch; while (ch = getchar(), isspace(ch)); if (ch == EOF) return false; while (!isspace(ch)) *s++ = ch, ch = getchar(); *s = '\000'; return true; }
inline void print(char x) { putchar(x); }
inline void print(char *x) { while (*x) putchar(*x++); }
inline void print(const char *x) { for (int i = 0; x[i]; i++) putchar(x[i]); }
inline bool read(std::string& s) { s = ""; char ch; while (ch = getchar(), isspace(ch)); if (ch == EOF) return false; while (!isspace(ch)) s += ch, ch = getchar(); return true; }
inline void print(std::string x) { for (int i = 0, n = x.size(); i < n; i++) putchar(x[i]); }
inline bool read(bool &b) { char ch; while(ch=getchar(), isspace(ch)); b=ch^48; return true; }
inline void print(bool b) { putchar(b+48); }
template<typename T, typename... T1> inline int read(T& a, T1&... other) { return read(a) + read(other...); }
template<typename T, typename... T1> inline void print(T a, T1... other) { print(a), print(other...); }
struct Fast_IO { ~Fast_IO() { fwrite(obuf, p3 - obuf, 1, stdout); } } io;
template<typename T> Fast_IO& operator >> (Fast_IO &io, T &b) { return read(b), io; }
template<typename T> Fast_IO& operator << (Fast_IO &io, T b) { return print(b), io; }
#define cout io
#define cin io
#define endl '\n'
} using namespace fast_IO;
using namespace std;
using namespace __gnu_pbds;
const int N=2e5+10,mod=1e9+7;
int n,m,a[N],prime[N],cnt,inv[N*5],res=1,ans[N],siz[N*5],inv2[N*5],bl[N],siz2[169][N],ma[N*5];
bool is[5*N],use[5*N];
struct query{
int l,r,id;
}q[N];
#define pii pair<int,int>
#define mk(a,b) {a,b}
#define pb push_back
vector<int>p[10*N];
inline int qpow(int a,int b){
int res=1;
while(b){
if(b&1)res=1ll*res*a%mod;
a=1ll*a*a%mod;
b>>=1;
}
return res;
}
inline void euler(){
is[1]=1;
for(int i=2;i<=1e6;++i){
if(!is[i])prime[++cnt]=i;
for(int j=1;j<=cnt&&i*prime[j]<=1e6;++j){
is[i*prime[j]]=1;
if(!(i%prime[j]))break;
}
}
for(int i=1;i<=cnt;++i){
for(int x=1;x*prime[i]<=1e6;++x){
int val=x*prime[i];
if(!use[val])continue;
ma[val]=prime[i];
while(!(val%prime[i]))p[x*prime[i]].pb(i),val/=prime[i];
}
}
}
inline bool cmp(query a,query b){
if(bl[a.l]!=bl[b.l])return a.l<b.l;
else return (bl[a.l]&1)?a.r<b.r:a.r>b.r;
}
inline void add(int val){
int x=ma[val];
if(x>1000){
++siz[x];
if(siz[x]==1)res=1ll*res*(x-1)%mod;
else res=1ll*res*x%mod;
}
}
inline void del(int val){
int x=ma[val];
if(x>1000){
--siz[x];
if(!siz[x]){
if(!inv2[x])inv2[x]=qpow(x-1,mod-2);
res=1ll*res*inv2[x]%mod;
}
else{
if(!inv[x])inv[x]=qpow(x,mod-2);
res=1ll*res*inv[x]%mod;
}
}
}
cc_hash_table<int,int>mp[200];
signed main(){
cin>>n;
int len=1250;
for(int i=1;i<=n;++i)cin>>a[i],bl[i]=(i/len)+1,use[a[i]]=1;
euler();
for(int i=1;i<=n;++i){
for(int j=1;prime[j]<1000;++j)siz2[j][i]=siz2[j][i-1];
for(auto x:p[a[i]]){
if(prime[x]>1000)continue;
++siz2[x][i];
}
}
cin>>m;
for(int i=1;i<=m;++i){
cin>>q[i].l>>q[i].r;
q[i].id=i;
}
sort(q+1,q+1+m,cmp);
int l=1,r=0;
for(int i=1;i<=m;++i){
while(r<q[i].r)add(a[++r]);
while(l>q[i].l)add(a[--l]);
while(r>q[i].r)del(a[r--]);
while(l<q[i].l)del(a[l++]);
ans[q[i].id]=res;
}
for(int i=1;i<=m;++i){
int res2=1;
for(int j=1;prime[j]<1000;++j){
int x=siz2[j][q[i].r]-siz2[j][q[i].l-1];
if(!x)continue;
if(mp[j].find(x-1)==mp[j].end())mp[j][x-1]=qpow(prime[j],x-1);
res2=1ll*res2*(prime[j]-1)%mod*mp[j][x-1]%mod;
}
ans[q[i].id]=1ll*ans[q[i].id]*res2%mod;
}
for(int i=1;i<=m;++i)cout<<ans[i]<<"\n";
return 0;
}
AC
#include<bits/stdc++.h>
#include<bits/extc++.h>
namespace fast_IO {
#define IOSIZE 1000000
char ibuf[IOSIZE], obuf[IOSIZE], *p1 = ibuf, *p2 = ibuf, *p3 = obuf;
#define getchar() ((p1==p2)and(p2=(p1=ibuf)+fread(ibuf,1,IOSIZE,stdin),p1==p2)?(EOF):(*p1++))
#define putchar(x) ((p3==obuf+IOSIZE)&&(fwrite(obuf,p3-obuf,1,stdout),p3=obuf),*p3++=x)
#define isdigit(ch) (ch>47&&ch<58)
#define isspace(ch) (ch<33)
template<typename T> inline T read() { T s = 0; int w = 1; char ch; while (ch = getchar(), !isdigit(ch) and (ch != EOF)) if (ch == '-') w = -1; if (ch == EOF) return false; while (isdigit(ch)) s = s * 10 + ch - 48, ch = getchar(); return s * w; }
template<typename T> inline bool read(T &s) { s = 0; int w = 1; char ch; while (ch = getchar(), !isdigit(ch) and (ch != EOF)) if (ch == '-') w = -1; if (ch == EOF) return false; while (isdigit(ch)) s = s * 10 + ch - 48, ch = getchar(); return s *= w, true; }
template<typename T> inline void print(T x) { if (x < 0) putchar('-'), x = -x; if (x > 9) print(x / 10); putchar(x % 10 + 48); }
inline bool read(char &s) { while (s = getchar(), isspace(s)); return true; }
inline bool read(char *s) { char ch; while (ch = getchar(), isspace(ch)); if (ch == EOF) return false; while (!isspace(ch)) *s++ = ch, ch = getchar(); *s = '\000'; return true; }
inline void print(char x) { putchar(x); }
inline void print(char *x) { while (*x) putchar(*x++); }
inline void print(const char *x) { for (int i = 0; x[i]; i++) putchar(x[i]); }
inline bool read(std::string& s) { s = ""; char ch; while (ch = getchar(), isspace(ch)); if (ch == EOF) return false; while (!isspace(ch)) s += ch, ch = getchar(); return true; }
inline void print(std::string x) { for (int i = 0, n = x.size(); i < n; i++) putchar(x[i]); }
inline bool read(bool &b) { char ch; while(ch=getchar(), isspace(ch)); b=ch^48; return true; }
inline void print(bool b) { putchar(b+48); }
template<typename T, typename... T1> inline int read(T& a, T1&... other) { return read(a) + read(other...); }
template<typename T, typename... T1> inline void print(T a, T1... other) { print(a), print(other...); }
struct Fast_IO { ~Fast_IO() { fwrite(obuf, p3 - obuf, 1, stdout); } } io;
template<typename T> Fast_IO& operator >> (Fast_IO &io, T &b) { return read(b), io; }
template<typename T> Fast_IO& operator << (Fast_IO &io, T b) { return print(b), io; }
#define cout io
#define cin io
#define endl '\n'
} using namespace fast_IO;
using namespace std;
using namespace __gnu_pbds;
const int N=2e5+10,mod=1e9+7;
int n,m,a[N],prime[N],cnt,inv[N*5],res=1,ans[N],siz[N*5],inv2[N*5],bl[N],siz2[169][N],ma[N*5];
bool is[5*N],use[5*N];
struct query{
int l,r,id;
}q[N];
#define pii pair<int,int>
#define mk(a,b) {a,b}
#define pb push_back
vector<int>p[10*N];
inline int qpow(int a,int b){
int res=1;
while(b){
if(b&1)res=1ll*res*a%mod;
a=1ll*a*a%mod;
b>>=1;
}
return res;
}
inline void euler(){
is[1]=1;
for(int i=2;i<=1e6;++i){
if(!is[i])prime[++cnt]=i;
for(int j=1;j<=cnt&&i*prime[j]<=1e6;++j){
is[i*prime[j]]=1;
if(!(i%prime[j]))break;
}
}
for(int i=1;i<=cnt;++i){
for(int x=1;x*prime[i]<=1e6;++x){
int val=x*prime[i];
if(!use[val])continue;
ma[val]=prime[i];
while(!(val%prime[i]))p[x*prime[i]].pb(i),val/=prime[i];
}
}
}
inline bool cmp(query a,query b){
if(bl[a.l]!=bl[b.l])return a.l<b.l;
else return (bl[a.l]&1)?a.r<b.r:a.r>b.r;
}
inline void add(int val){
int x=ma[val];
if(x>1000){
++siz[x];
if(siz[x]==1)res=1ll*res*(x-1)%mod;
else res=1ll*res*x%mod;
}
}
inline void del(int val){
int x=ma[val];
if(x>1000){
--siz[x];
if(!siz[x]){
if(!inv2[x])inv2[x]=qpow(x-1,mod-2);
res=1ll*res*inv2[x]%mod;
}
else{
if(!inv[x])inv[x]=qpow(x,mod-2);
res=1ll*res*inv[x]%mod;
}
}
}
cc_hash_table<int,int>mp[200];
signed main(){
cin>>n;
int len=1250;
for(int i=1;i<=n;++i)cin>>a[i],bl[i]=(i/len)+1,use[a[i]]=1;
euler();
for(int i=1;i<=n;++i){
for(int j=1;prime[j]<1000;++j)siz2[j][i]=siz2[j][i-1];
for(auto x:p[a[i]]){
if(prime[x]>1000)continue;
++siz2[x][i];
}
}
cin>>m;
for(int i=1;i<=m;++i){
cin>>q[i].l>>q[i].r;
q[i].id=i;
}
sort(q+1,q+1+m,cmp);
int l=1,r=0;
for(int i=1;i<=m;++i){
while(r<q[i].r)add(a[++r]);
while(l>q[i].l)add(a[--l]);
while(r>q[i].r)del(a[r--]);
while(l<q[i].l)del(a[l++]);
int res2=1;
for(int j=1;prime[j]<1000;++j){
int x=siz2[j][r]-siz2[j][l-1];
if(!x)continue;
if(mp[j].find(x-1)==mp[j].end())mp[j][x-1]=qpow(prime[j],x-1);
res2=1ll*res2*(prime[j]-1)%mod*mp[j][x-1]%mod;
}
ans[q[i].id]=1ll*res*res2%mod;
}
for(int i=1;i<=m;++i)cout<<ans[i]<<"\n";
return 0;
}
两份代码唯一的区别就是中间的一个循环拆成了两个。
加载中...