답안 #68014

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
68014 2018-08-15T18:37:50 Z wleung_bvg 구경하기 (JOI13_watching) C++14
100 / 100
74 ms 1000 KB
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define f first
#define s second
#define all(a) (a).begin(),(a).end()
#define For(i,a,b) for(auto i=(a);i<(b);i++)
#define FOR(i,b) For(i,0,b)
#define Rev(i,a,b) for(auto i=(a);i>(b);i--)
#define REV(i,a) Rev(i,a,-1)
#define sz(a) ((int)(a).size())
using ll=long long;using ld=long double;using uint=unsigned int;using ull=unsigned long long;
using pii=pair<int,int>;using pll=pair<ll,ll>;using pill=pair<int,ll>;using plli=pair<ll,int>;using pdd=pair<double,double>;using pld=pair<ld,ld>;
constexpr const char nl='\n',sp=' ';constexpr const int INT_INF=0x3f3f3f3f;constexpr const ll LL_INF=0x3f3f3f3f3f3f3f3f;
constexpr const double D_INF=numeric_limits<double>::infinity();constexpr const ld LD_INF=numeric_limits<ld>::infinity();constexpr const double EPS=1e-9;
template<typename T1,typename T2>bool feq(const T1&x,const T2&y){return is_floating_point<common_type_t<T1,T2>>::value?abs(x-y)<=EPS:x==y;}
template<typename T1,typename T2>bool flt(const T1&x,const T2&y){return is_floating_point<common_type_t<T1,T2>>::value?x<y-EPS:x<y;}
template<typename T1,typename T2>bool fgt(const T1&x,const T2&y){return is_floating_point<common_type_t<T1,T2>>::value?x>y+EPS:x>y;}
template<typename T>constexpr const T&_min(const T&x,const T&y){return x<y?x:y;}template<typename T>constexpr const T&_max(const T&x,const T&y){return x<y?y:x;}
template<typename T,typename...Ts>constexpr const T&_min(const T&x,const Ts&...xs){return _min(x,_min(xs...));}
template<typename T,typename...Ts>constexpr const T&_max(const T&x,const Ts&...xs){return _max(x,_max(xs...));}
template<typename T,typename...Ts>void MIN(T&x,const Ts&...xs){x=_min(x,xs...);}template<typename T,typename...Ts>void MAX(T&x,const Ts&...xs){x=_max(x,xs...);}
template<typename T>constexpr const T&_clamp(const T&v,const T&lo,const T&hi){return v<lo?lo:hi<v?hi:v;}template<typename T>void CLAMP(T&v,const T&lo,const T&hi){v=_clamp(v,lo,hi);}
template<typename T,typename...Args>unique_ptr<T>_make_unique(Args&&...args){return unique_ptr<T>(new T(forward<Args>(args)...));}
template<typename T,typename...Args>shared_ptr<T>_make_shared(Args&&...args){return shared_ptr<T>(new T(forward<Args>(args)...));}
#define min _min
#define max _max
#define clamp _clamp
#define make_unique _make_unique
#define make_shared _make_shared
template<typename...Ts>using uset=unordered_set<Ts...>;template<typename...Ts>using umap=unordered_map<Ts...>;template<typename...Ts>using pq=priority_queue<Ts...>;
template<typename T>using minpq=pq<T,vector<T>,greater<T>>;template<typename T>using maxpq=pq<T,vector<T>,less<T>>;
template<typename T1,typename T2,typename H1=hash<T1>,typename H2=hash<T2>>struct pair_hash{size_t operator()(const pair<T1,T2>&p)const{return 31*H1{}(p.first)+H2{}(p.second);}};
seed_seq seq {
    (uint64_t)chrono::duration_cast<chrono::nanoseconds>(chrono::high_resolution_clock::now().time_since_epoch()).count(),
    (uint64_t)__builtin_ia32_rdtsc(),(uint64_t)(uintptr_t)make_unique<char>().get()
};
mt19937 rng(seq);

constexpr int _bufferSize=4096,_maxNumLength=128;
char _inputBuffer[_bufferSize+1],*_inputPtr=_inputBuffer,_outputBuffer[_bufferSize],_c,_sign,*_tempInputBuf=nullptr,_numBuf[_maxNumLength],_tempOutputBuf[_maxNumLength],_fill=' ';
FILE*_input=stdin,*_output=stdout,*_error=stderr;const char*_delimiter=" ";int _cur,_outputPtr=0,_numPtr=0,_precision=6,_width=0,_tempOutputPtr=0,_cnt;ull _precisionBase=1000000;
#define _peekchar() (*_inputPtr?*_inputPtr:(_inputBuffer[fread(_inputPtr=_inputBuffer,1,_bufferSize,_input)]='\0',*_inputPtr))
#define _getchar() (*_inputPtr?*_inputPtr++:(_inputBuffer[fread(_inputPtr=_inputBuffer,1,_bufferSize,_input)]='\0',*_inputPtr++))
#define _hasNext() (*_inputPtr||!feof(_input))
#define _readSignAndNum(x) do{(x)=_getchar();}while((x)<=' ');_sign=(x)=='-';if(_sign)(x)=_getchar();for((x)-='0';(_c=_getchar())>='0';(x)=(x)*10+_c-'0')
#define _readFloatingPoint(x,T) for(T _div=1.0;(_c=_getchar())>='0';(x)+=(_c-'0')/(_div*=10))
#define rc(x) do{do{(x)=_getchar();}while((x)<=' ');}while(0)
#define ri(x) do{_readSignAndNum(x);if(_sign)(x)=-(x);}while(0)
#define rd(x) do{_readSignAndNum(x);if(_c=='.')_readFloatingPoint(x,double);if(_sign)(x)=-(x);}while(0)
#define rld(x) do{_readSignAndNum(x);if(_c=='.')_readFloatingPoint(x,ld);if(_sign)(x)=-(x);}while(0)
#define rcs(x) do{_cur=0;do{_c=_getchar();}while(_c<=' ');do{(x)[_cur++]=_c;}while((_c=_getchar())>' ');(x)[_cur]='\0';}while(0)
#define rs(x) do{if(!_tempInputBuf)assert(0);rcs(_tempInputBuf);(x)=string(_tempInputBuf,_cur);}while(0)
#define rcln(x) do{_cur=0;do{_c=_getchar();}while(_c<=' ');do{(x)[_cur++]=_c;}while((_c=_getchar())>=' ');(x)[_cur]='\0';}while(0)
#define rln(x) do{if(!_tempInputBuf)assert(0);rcln(_tempInputBuf);(x)=string(_tempInputBuf,_cur);}while(0)
#define setLength(x) do{if(_tempInputBuf)delete[](_tempInputBuf);_tempInputBuf=new char[(x)+1];}while(0)
void read(int&x){ri(x);}void read(uint&x){ri(x);}void read(ll&x){ri(x);}void read(ull&x){ri(x);}void read(double&x){rd(x);}void read(ld&x){rld(x);}
void read(char&x){rc(x);}void read(char*x){rcs(x);}void read(string&x){rs(x);}
template<typename T1,typename T2>void read(pair<T1,T2>&x){read(x.first);read(x.second);}template<typename T>void read(complex<T>&x){T _re,_im;read(_re);read(_im);x.real(_re);x.imag(_im);}
bool hasNext(){while(_hasNext()&&_peekchar()<=' ')_getchar();return _hasNext();}
template<typename T,typename...Ts>void read(T&x,Ts&...xs){read(x);read(xs...);}
void setInput(FILE*file){*_inputPtr='\0';_input=file;}void setInput(const char*s){*_inputPtr='\0';_input=fopen(s,"r");}void setInput(const string&s){*_inputPtr='\0';_input=fopen(s.c_str(),"r");}
#define _flush() do{_flushBuf();fflush(_output);}while(0)
#define _flushBuf() (fwrite(_outputBuffer,1,_outputPtr,_output),_outputPtr=0)
#define _putchar(x) (_outputBuffer[_outputPtr==_bufferSize?_flushBuf():_outputPtr]=(x),_outputPtr++)
#define _writeTempBuf(x) (_tempOutputBuf[_tempOutputPtr++]=(x))
#define _writeOutput() for(int _i=0;_i<_tempOutputPtr;_putchar(_tempOutputBuf[_i++]));_tempOutputPtr=0
#define _writeNum(x,T,digits) _cnt=0;for(T _y=(x);_y;_y/=10,_cnt++)_numBuf[_numPtr++]='0'+_y%10;for(;_cnt<digits;_cnt++)_numBuf[_numPtr++]='0';_flushNumBuf();
#define _writeFloatingPoint(x,T) ull _I=(ull)(x);ull _F=((x)-_I)*_precisionBase+(T)(0.5);if(_F>=_precisionBase){_I++;_F=0;}_writeNum(_I,ull,1);_writeTempBuf('.');_writeNum(_F,ull,_precision)
#define _checkFinite(x) if(std::isnan(x)){wcs("NaN");}else if(std::isinf(x)){wcs("Inf");}
#define _flushNumBuf() for(;_numPtr;_writeTempBuf(_numBuf[--_numPtr]))
#define _fillBuf(x) for(int _i=0;_i<(x);_i++)_putchar(_fill)
#define _flushTempBuf() int _tempLen=_tempOutputPtr;_fillBuf(_width-_tempLen);_writeOutput();_fillBuf(-_width-_tempLen)
#define wb(x) do{if(x)_writeTempBuf('1');else _writeTempBuf('0');_flushTempBuf();}while(0)
#define wc(x) do{_writeTempBuf(x); _flushTempBuf();}while(0)
#define wi(x) do{if((x)<0){_writeTempBuf('-');_writeNum(-(x),uint,1);}else{_writeNum(x,uint,1);}_flushTempBuf();}while(0)
#define wll(x) do{if((x)<0){_writeTempBuf('-');_writeNum(-(x),ull,1);}else{_writeNum(x,ull,1);}_flushTempBuf();}while(0)
#define wd(x) do{_checkFinite(x)else if((x)<0){_writeTempBuf('-');_writeFloatingPoint(-(x),double);}else{_writeFloatingPoint(x,double);}_flushTempBuf();}while(0)
#define wld(x) do{_checkFinite(x)else if((x)<0){_writeTempBuf('-');_writeFloatingPoint(-(x),ld);}else{_writeFloatingPoint(x,ld);}_flushTempBuf();}while(0)
#define wcs(x) do{int _slen=strlen(x);_fillBuf(_width-_slen);for(const char*_p=(x);*_p;_putchar(*_p++));_fillBuf(-_width-_slen);}while(0)
#define ws(x) do{_fillBuf(_width-(int)(x).length());for(int _i=0;_i<(int)(x).length();_putchar(x[_i++]));_fillBuf(-_width-(int)(x).length());}while(0)
#define setPrecision(x) do{_precision=(x);_precisionBase=1;for(int _i=0;_i<(x);_i++,_precisionBase*=10);}while(0)
#define setDelimiter(x) do{_delimiter=(x);}while(0)
#define setWidth(x) do{_width=(x);}while(0)
#define setFill(x) do{_fill=(x);}while(0)
void writeDelimiter(){for(const char*_p=_delimiter;*_p;_putchar(*_p++));}
void write(const bool&x){wb(x);}void write(const int&x){wi(x);}void write(const uint&x){wi(x);}void write(const ll&x){wll(x);}void write(const ull&x){wll(x);}
void write(const double&x){wd(x);}void write(const ld&x){wld(x);}void write(const char&x){wc(x);}void write(const char*x){wcs(x);}void write(const string&x){ws(x);}
template<typename T1,typename T2>void write(const pair<T1,T2>&x){write(x.first);writeDelimiter();write(x.second);}
template<typename T>void write(const complex<T>&x){write(x.real());writeDelimiter();write(x.imag());}
template<typename T>void write(const T&x){bool _first=1;for(auto&&_i:x){if(_first)_first=0;else writeDelimiter();write(_i);}}
template<typename T,typename...Ts>void write(const T&x,const Ts&...xs){write(x);writeDelimiter();write(xs...);}
void writeln(){_putchar('\n');}template<typename...Ts>void writeln(const Ts&...xs){write(xs...);_putchar('\n');}
void flush(){_flush();}class IOManager{public:~IOManager(){flush();}};unique_ptr<IOManager>iomanager=make_unique<IOManager>();
void setOutput(FILE*file){flush();_output=file;}void setOutput(const char*s){flush();_output=fopen(s,"w");}void setOutput(const string&s){flush();_output=fopen(s.c_str(),"w");}
template<typename...Ts>void debug(const Ts&...xs){FILE*_temp=_output;setOutput(_error);write(xs...);setOutput(_temp);}
template<typename...Ts>void debugln(const Ts&...xs){FILE*_temp=_output;setOutput(_error);writeln(xs...);setOutput(_temp);}
void setError(FILE*file){flush();_error=file;}void setError(const char*s){flush();_error=fopen(s,"w");}void setError(const string&s){flush();_error=fopen(s.c_str(),"w");}

#define MAXN 2005
int N, P, Q, A[MAXN], dp[2][MAXN], p[MAXN], q[MAXN];

bool f(int x) {
    FOR(i, N) {
        p[i] = upper_bound(A, A + N, A[i] + x - 1) - A;
        q[i] = upper_bound(A, A + N, A[i] + x * 2 - 1) - A;
    }
    dp[0][0] = 0;
    For(j, 1, Q + 1) dp[0][j] = -1;
    FOR(i, P + 1) {
        FOR(j, Q + 1) dp[1 - i % 2][j] = -1;
        FOR(j, Q + 1) {
            if (dp[i % 2][j] == -1) continue;
            if (dp[i % 2][j] >= N) return true;
            MAX(dp[1 - i % 2][j], p[dp[i % 2][j]]);
            MAX(dp[i % 2][j + 1], q[dp[i % 2][j]]);
        }
    }
    return false;
}

int main() {
    // setInput("in.txt");
    // setOutput("out.txt");
    // setError("err.txt");
    read(N, P, Q);
    if (P + Q >= N) {
        writeln(1);
        return 0;
    }
    FOR(i, N) read(A[i]);
    sort(A, A + N);
    int lo = 1, hi = 1e9, mid;
    while (lo < hi) {
        mid = lo + (hi - lo) / 2;
        if (f(mid)) hi = mid;
        else lo = mid + 1;
    }
    writeln(lo);
    return 0;
}
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 2 ms 488 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 2 ms 596 KB Output is correct
7 Correct 2 ms 700 KB Output is correct
8 Correct 3 ms 700 KB Output is correct
9 Correct 3 ms 700 KB Output is correct
10 Correct 3 ms 700 KB Output is correct
11 Correct 3 ms 704 KB Output is correct
12 Correct 3 ms 708 KB Output is correct
13 Correct 4 ms 712 KB Output is correct
14 Correct 3 ms 712 KB Output is correct
15 Correct 3 ms 712 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 724 KB Output is correct
2 Correct 2 ms 724 KB Output is correct
3 Correct 2 ms 724 KB Output is correct
4 Correct 2 ms 724 KB Output is correct
5 Correct 2 ms 724 KB Output is correct
6 Correct 2 ms 852 KB Output is correct
7 Correct 7 ms 852 KB Output is correct
8 Correct 18 ms 852 KB Output is correct
9 Correct 19 ms 852 KB Output is correct
10 Correct 26 ms 936 KB Output is correct
11 Correct 17 ms 956 KB Output is correct
12 Correct 74 ms 956 KB Output is correct
13 Correct 8 ms 956 KB Output is correct
14 Correct 10 ms 992 KB Output is correct
15 Correct 12 ms 1000 KB Output is correct