結果
問題 | No.1653 Squarefree |
ユーザー |
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提出日時 | 2021-12-02 16:04:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,682 bytes |
コンパイル時間 | 1,980 ms |
コンパイル使用メモリ | 198,804 KB |
最終ジャッジ日時 | 2025-01-26 02:50:54 |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 14 WA * 24 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:64:17: warning: ‘S’ may be used uninitialized [-Wmaybe-uninitialized] 64 | for(ll t=S;t<=T;t++)if(L<=t*t and t*t<R and t!=1) ban.insert(t*t); | ~^~~ main.cpp:46:8: note: ‘S’ was declared here 46 | ll S; | ^ main.cpp:64:17: warning: ‘T’ may be used uninitialized [-Wmaybe-uninitialized] 64 | for(ll t=S;t<=T;t++)if(L<=t*t and t*t<R and t!=1) ban.insert(t*t); | ~^~~ main.cpp:55:8: note: ‘T’ was declared here 55 | ll T; | ^
ソースコード
#include"bits/stdc++.h"using namespace std;#define ALL(x) begin(x),end(x)#define rep(i,n) for(int i=0;i<(n);i++)#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;#define mod 1000000007using ll=long long;const int INF=1000000000;const ll LINF=1001002003004005006ll;int dx[]={1,0,-1,0},dy[]={0,1,0,-1};// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}struct IOSetup{IOSetup(){cin.tie(0);ios::sync_with_stdio(0);cout<<fixed<<setprecision(12);}} iosetup;template<typename T>ostream &operator<<(ostream &os,const vector<T>&v){for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==(int)v.size()?"":" ");return os;}template<typename T>istream &operator>>(istream &is,vector<T>&v){for(T &x:v)is>>x;return is;}signed main(){ll L,R;cin>>L>>R;R++;ll W=R-L;set<ll> ban;for(ll i=2;i*i<=W+1029418;i++){ll p=i*i;ll st=((p+L-1)/p)*p;for(ll t=st;t<R;t+=p) ban.insert(t);}ll S;{ll lw=1,hi=1000000000;while(lw<=hi){ll mid=(lw+hi)/2;if(L<=mid*mid) S=mid,hi=mid-1;else lw=mid+1;}}ll T;{ll lw=1,hi=1000000000;while(lw<=hi){ll mid=(lw+hi)/2;if(mid*mid<=R) T=mid,lw=mid+1;else hi=mid-1;}}for(ll t=S;t<=T;t++)if(L<=t*t and t*t<R and t!=1) ban.insert(t*t);cout<<W-(ll)ban.size()<<endl;return 0;}