結果
| 問題 | No.820 Power of Two |
| ユーザー |
 tatyam
|
| 提出日時 | 2019-04-26 21:21:17 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 7,379 bytes |
| コンパイル時間 | 2,173 ms |
| コンパイル使用メモリ | 194,720 KB |
| 最終ジャッジ日時 | 2025-01-07 03:02:44 |
|
ジャッジサーバーID （参考情報） |
judge3 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 10 |
コンパイルメッセージ
main.cpp: In function ‘void scan(long long int&)’:
main.cpp:75:38: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
75 | inline void scan(long long &a){ scanf("%lld", &a); }
| ~~~~~^~~~~~~~~~~~
ソースコード
#include <bits/stdc++.h>using namespace std;using ll=long long;using ld=long double;using ull=unsigned long long;using uint=unsigned int;using pcc=pair<char,char>;using pii=pair<int,int>;using pll=pair<ll,ll>;using pdd=pair<double,double>;using tuplis=pair<ll,pll>;using tuplis2=pair<pll,ll>;template<class T> using pq=priority_queue<T,vector<T>,greater<T>>;const ll LINF=0x1fffffffffffffff;const ll MOD=1000000007;const ll MODD=998244353;const int INF=0x3fffffff;const ld DINF=numeric_limits<ld>::infinity();const ld EPS=1e-8;const vector<pii> four={{-1,0},{0,1},{1,0},{0,-1}};#define _overload4(_1,_2,_3,_4,name,...) name#define _overload3(_1,_2,_3,name,...) name#define _rep1(n) for(ll i=0;i<n;++i)#define _rep2(i,n) for(ll i=0;i<n;++i)#define _rep3(i,a,b) for(ll i=a;i<b;++i)#define _rep4(i,a,b,c) for(ll i=a;i<b;i+=c)#define rep(...) _overload4(__VA_ARGS__,_rep4,_rep3,_rep2,_rep1)(__VA_ARGS__)#define _rrep1(n) for(ll i=n-1;i>=0;i--)#define _rrep2(i,n) for(ll i=n-1;i>=0;i--)#define _rrep3(i,a,b) for(ll i=b-1;i>=a;i--)#define _rrep4(i,a,b,c) for(ll i=a+(b-a-1)/c*c;i>=a;i-=c)#define rrep(...) _overload4(__VA_ARGS__,_rrep4,_rrep3,_rrep2,_rrep1)(__VA_ARGS__)#define each(i,a) for(auto &i:a)#define sum(...) accumulate(range(__VA_ARGS__),0LL)#define dsum(...) accumulate(range(__VA_ARGS__),double(0))#define _range(i) (i).begin(),(i).end()#define _range2(i,k) (i).begin(),(i).begin()+k#define _range3(i,a,b) (i).begin()+a,(i).begin()+b#define range(...) _overload3(__VA_ARGS__,_range3,_range2,_range)(__VA_ARGS__)#define _rrange(i) (i).rbegin(),(i).rend()#define _rrange2(i,k) (i).rbegin(),(i).rbegin()+k#define _rrange3(i,a,b) (i).rbegin()+a,(i).rbegin()+b#define rrange(...) _overload3(__VA_ARGS__,_rrange3,_rrange2,_rrange)(__VA_ARGS__)#define elif else if#define unless(a) if(!(a))#define mp make_pair#define mt make_tuple#define INT(...) int __VA_ARGS__;in(__VA_ARGS__)#define LL(...) ll __VA_ARGS__;in(__VA_ARGS__)#define STR(...) string __VA_ARGS__;in(__VA_ARGS__)#define CHR(...) char __VA_ARGS__;in(__VA_ARGS__)#define DBL(...) double __VA_ARGS__;in(__VA_ARGS__)#define vec(type,name,...) vector<type> name(__VA_ARGS__)#define VEC(type,name,size) vector<type> name(size);in(name)#define vv(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__))#define VV(type,name,h,...) vector<vector<type>>name(h,vector<type>(__VA_ARGS__));in(name)#define vvv(type,name,h,w,...) vector<vector<vector<type>>>name(h,vector<vector<type>>(w,vector<type>(__VA_ARGS__)))struct SETTINGS{SETTINGS(){cout<<fixed<<setprecision(20);};};SETTINGS _SETTINGS();inline constexpr ll gcd(ll a,ll b){if(!a||!b)return 0;while(b){ll c=b;b=a%b;a=c;}return a;}inline constexpr ll lcm(ll a,ll b){if(!a||!b)return 0;return a*b/gcd(a,b);}template<class T> inline constexpr T min(vector<T> &v){return *min_element(range(v));}inline char min(string &v){return *min_element(range(v));}template<class T> inline constexpr T max(vector<T> &v){return *max_element(range(v));}inline char max(string &v){return *max_element(range(v));}inline constexpr ll intpow(const ll&a,const ll&b){if(b==0)return 1;ll ans=intpow(a,b/2);return ans*ans*(b&1?a:1);}inline constexpr ll modpow(const ll&a,const ll&b,const ll&mod=MOD){if(b==0)return 1;ll ans=modpow(a,b/2,mod);ans=ans*ans%mod;if(b&1)ans=ans*a%mod;return ans;}template<typename T>inline constexpr bool update_min(T &mn,const T &cnt){if(mn>cnt){mn=cnt;return 1;}else return 0;}template<typename T>inline constexpr bool update_max(T &mx,const T &cnt){if(mx<cnt){mx=cnt;return 1;}else return 0;}inline int scan(){ return getchar(); }inline void scan(int &a){ scanf("%d", &a); }inline void scan(unsigned &a){ scanf("%u", &a); }inline void scan(long &a){ scanf("%ld", &a); }inline void scan(long long &a){ scanf("%lld", &a); }inline void scan(unsigned long long &a){ scanf("%llu", &a); }inline void scan(char &a){ scanf("%c", &a); }inline void scan(float &a){ scanf("%f", &a); }inline void scan(double &a){ scanf("%lf", &a); }inline void scan(long double &a){ scanf("%Lf", &a); }inline void scan(vector<bool> &vec){ for(unsigned i = 0; i < vec.size(); i++) { int a; scan(a); vec[i] = a; } }template<class T> inline void scan(vector<T> &vec);template<class T, size_t size> inline void scan(array<T, size> &vec);template<class T, class L> inline void scan(pair<T, L> &p);template<class T, size_t size> inline void scan(T (&vec)[size]);template<class T> inline void scan(vector<T> &vec){ for(auto &i : vec) scan(i); }template<class T, size_t size> inline void scan(array<T, size> &vec){ for(auto &i : vec) scan(i); }template<class T, class L> inline void scan(pair<T, L> &p){ scan(p.first); scan(p.second); }template<class T, size_t size> inline void scan(T (&vec)[size]){ for(auto &i : vec) scan(i); }template<class T> inline void scan(T &a){ cin>>a; }inline void in(){}template <class Head, class... Tail> inline void in(Head &head, Tail&... tail){ scan(head); in(tail...); }inline void print(){ putchar('\n'); }inline void print(const bool &a){ printf("%d", a); }inline void print(const int &a){ printf("%d", a); }inline void print(const unsigned &a){ printf("%u", a); }inline void print(const long &a){ printf("%ld", a); }inline void print(const long long &a){ printf("%lld", a); }inline void print(const unsigned long long &a){ printf("%llu", a); }inline void print(const char &a){ printf("%c", a); }inline void print(const char a[]){ printf("%s", a); }inline void print(const float &a){ printf("%.10f", a); }inline void print(const double &a){ printf("%.10f", a); }inline void print(const long double &a){ printf("%.10Lf", a); }template<class T> void print(const vector<T> &vec);template<class T, size_t size> void print(const array<T, size> &vec);template<class T, class L> void print(const pair<T, L> &p);template<class T, size_t size> inline void print(const T (&vec)[size]);template<class T> void print(const vector<T> &vec){ print(vec[0]); for(auto i = vec.begin(); ++i != vec.end(); ){ putchar(' '); print(*i); } }template<class T, size_t size> void print(const array<T, size> &vec){ print(vec[0]); for(auto i = vec.begin(); ++i != vec.end(); ){ putchar(' ');print(*i); } }template<class T, class L> void print(const pair<T, L> &p){ print(p.first); putchar(' '); print(p.second); }template<class T, size_t size> inline void print(const T (&vec)[size]){ print(vec[0]); for(auto i = vec; ++i != end(vec); ){ putchar(' '); print(*i);} }template<class T> inline void print(const T &a){ cout << a; }inline bool out(){ putchar('\n'); return 0; }template<class T> inline bool out(const T &t){ print(t); putchar('\n'); return 0; }template<class Head, class... Tail> inline bool out(const Head &head, const Tail&... tail){ print(head); putchar(' '); out(tail...); return 0; }template <class T>inline void err(T t){cerr<<t<<'\n';}inline void err(){cerr<<'\n';}inline bool yes(bool i){return out(i?"yes":"no");}inline bool Yes(bool i){return out(i?"Yes":"No");}inline bool YES(bool i){return out(i?"YES":"NO");}inline bool Yay(bool i){return out(i?"Yay!":":(");}inline bool Possible(bool i){return out(i?"Possible":"Impossible");}inline bool POSSIBLE(bool i){return out(i?"POSSIBLE":"IMPOSSIBLE");}inline void Case(ll i){cout<<"Case #"<<i<<": ";}int main(){LL(n,k);if(n<k)return out(0);out(1ll<<(n-k));}