#139510 (C++14) No.468 役に立つ競技プログラミング実践編

提出ソース

結果

問題	No.468 役に立つ競技プログラミング実践編
ユーザー	shimomire
提出日時	2016-12-18 00:18:29
言語	C++14 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	127 ms / 2,000 ms
コード長	5,645 bytes
コンパイル時間	1,370 ms
コンパイル使用メモリ	130,892 KB
実行使用メモリ	17,280 KB
最終ジャッジ日時	2024-12-14 04:45:06
合計ジャッジ時間	4,023 ms
ジャッジサーバーID （参考情報）	judge5 / judge3

このコードへのチャレンジ
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テストケース

テストケース表示

入力	結果	実行時間実行使用メモリ
testcase_00	AC	2 ms 6,820 KB
testcase_01	AC	2 ms 6,816 KB
testcase_02	AC	2 ms 6,816 KB
testcase_03	AC	2 ms 6,820 KB
testcase_04	AC	2 ms 6,816 KB
testcase_05	AC	2 ms 6,820 KB
testcase_06	AC	2 ms 6,820 KB
testcase_07	AC	2 ms 6,816 KB
testcase_08	AC	2 ms 6,816 KB
testcase_09	AC	2 ms 6,820 KB
testcase_10	AC	3 ms 6,820 KB
testcase_11	AC	2 ms 6,820 KB
testcase_12	AC	2 ms 6,816 KB
testcase_13	AC	2 ms 6,816 KB
testcase_14	AC	2 ms 6,820 KB
testcase_15	AC	3 ms 6,816 KB
testcase_16	AC	3 ms 6,816 KB
testcase_17	AC	3 ms 6,820 KB
testcase_18	AC	3 ms 6,816 KB
testcase_19	AC	3 ms 6,820 KB
testcase_20	AC	3 ms 6,820 KB
testcase_21	AC	3 ms 6,816 KB
testcase_22	AC	3 ms 6,816 KB
testcase_23	AC	3 ms 6,816 KB
testcase_24	AC	123 ms 15,360 KB
testcase_25	AC	120 ms 15,360 KB
testcase_26	AC	111 ms 15,360 KB
testcase_27	AC	121 ms 15,360 KB
testcase_28	AC	126 ms 15,360 KB
testcase_29	AC	127 ms 15,360 KB
testcase_30	AC	123 ms 15,356 KB
testcase_31	AC	122 ms 15,448 KB
testcase_32	AC	119 ms 15,360 KB
testcase_33	AC	119 ms 15,232 KB
testcase_34	AC	46 ms 17,280 KB
testcase_35	AC	3 ms 6,820 KB
testcase_36	AC	2 ms 6,820 KB

権限があれば一括ダウンロードができます

ソースコード

raw source code

#include <cassert>// c
#include <iostream>// io
#include <iomanip>
#include <fstream>
#include <sstream>
#include <vector>// container
#include <map>
#include <set>
#include <queue>
#include <bitset>
#include <stack>
#include <algorithm>// other
#include <complex>
#include <numeric>
#include <functional>
#include <random>
#include <regex>
using namespace std;

typedef long long ll;typedef unsigned long long ull;typedef long double ld;

#define ALL(c) c.begin(),c.end()
#define IN(l,v,r) (l<=v && v < r)
template<class T> void UNIQUE(T& v){v.erase(unique(ALL(v)),v.end());}
//debug==
#define DUMP(x) cerr << #x <<" = " << (x)
#define LINE() cerr<< " (L" << __LINE__ << ")"

struct range{
	struct Iter{
		int v,step;
		Iter& operator++(){v+=step;return *this;}
		bool operator!=(Iter& itr){return v<itr.v;}
		int& operator*(){return v;}
	};
	Iter i, n;
	range(int i, int n,int step):i({i,step}), n({n,step}){}
	range(int i, int n):range(i,n,1){}
	range(int n):range(0,n){}
	Iter& begin(){return i;}
	Iter& end(){return n;}
};
struct rrange{
	struct Iter{
		int v,step;
		Iter& operator++(){v-=step;return *this;}
		bool operator!=(Iter& itr){return v>itr.v;}
		int& operator*(){return v;}
	};
	Iter i, n;
	rrange(int i, int n,int step):i({i-1,step}), n({n-1,step}){}
	rrange(int i, int n):rrange(i,n,1){}
	rrange(int n) :rrange(0,n){}
	Iter& begin(){return n;}
	Iter& end(){return i;}
};

//input
template<typename T1,typename T2> istream& operator >> (istream& is,pair<T1,T2>& p){return is>>p.first>>p.second;}
template<typename T1> istream& operator >> (istream& is,tuple<T1>& t){return is >> get<0>(t);}
template<typename T1,typename T2> istream& operator >> (istream& is,tuple<T1,T2>& t){return is >> get<0>(t) >> get<1>(t);}
template<typename T1,typename T2,typename T3> istream& operator >> (istream& is,tuple<T1,T2,T3>& t){return is >>get<0>(t)>>get<1>(t)>>get<2>(t);}
template<typename T1,typename T2,typename T3,typename T4> istream& operator >> (istream& is,tuple<T1,T2,T3,T4>& t){return is >> get<0>(t)>>get<1>(t)>>get<2>(t)>>get<3>(t);}
template<typename T> istream& operator >> (istream& is,vector<T>& as){for(int i:range(as.size()))is >>as[i];return is;}
//output
template<typename T> ostream& operator << (ostream& os, const set<T>& ss){for(auto a:ss){if(a!=ss.begin())os<<" "; os<<a;}return os;}
template<typename T1,typename T2> ostream& operator << (ostream& os, const pair<T1,T2>& p){return os<<p.first<<" "<<p.second;}
template<typename K,typename V> ostream& operator << (ostream& os, const map<K,V>& m){bool isF=true;for(auto& p:m){if(!isF)os<<endl;os<<p;isF=false;}return os;}
template<typename T1> ostream& operator << (ostream& os, const tuple<T1>& t){return os << get<0>(t);}
template<typename T1,typename T2> ostream& operator << (ostream& os, const tuple<T1,T2>& t){return os << get<0>(t)<<" "<<get<1>(t);}
template<typename T1,typename T2,typename T3> ostream& operator << (ostream& os, const tuple<T1,T2,T3>& t){return os << get<0>(t)<<" "<<get<1>(t)<<" "<<get<2>(t);}
template<typename T1,typename T2,typename T3,typename T4> ostream& operator << (ostream& os, const tuple<T1,T2,T3,T4>& t){return os << get<0>(t)<<" "<<get<1>(t)<<" "<<get<2>(t)<<" "<<get<3>(t);}
template<typename T> ostream& operator << (ostream& os, const vector<T>& as){for(int i:range(as.size())){if(i!=0)os<<" "; os<<as[i];}return os;}
template<typename T> ostream& operator << (ostream& os, const vector<vector<T>>& as){for(int i:range(as.size())){if(i!=0)os<<endl; os<<as[i];}return os;}

// values
template<typename T> inline T INF(){assert(false);};
template<> inline int INF<int>(){return 1<<28;};
template<> inline ll INF<ll>(){return 1LL<<60;};
template<> inline double INF<double>(){return 1e16;};
template<> inline long double INF<long double>(){return 1e16;};

template<class T> inline T EPS(){assert(false);};
template<> inline int EPS<int>(){return 1;};
template<> inline ll EPS<ll>(){return 1LL;};
template<> inline double EPS<double>(){return 1e-12;};
template<> inline long double EPS<long double>(){return 1e-12;};

// min{2^r | n < 2^r}
template<typename T> inline T upper_pow2(T n){ T res=1;while(res<n)res<<=1;return res;}
// max{d | 2^d  <= n}
template<typename T> inline T msb(T n){ int d=62;while((1LL<<d)>n)d--;return d;}

template<typename T,typename U> T pmod(T v,U M){return (v%M+M)%M;}


template<class Cost> struct Edge{
    int to;Cost cost;
    Edge(int to,Cost cost):to(to),cost(cost){};
    bool operator<(Edge r) const{ return cost<r.cost;}
    bool operator>(Edge r) const{ return cost>r.cost;}
};
template<class Cost> ostream& operator << (ostream& os, const Edge<Cost>& e){ return os<<"(->"<<e.to <<","<<e.cost<<")";}
template<class Cost> using Graph = vector<vector<Edge<Cost>>>;

class Main{
	public:

	int N,M;
	vector<vector<Edge<ll>>> revG;
	vector<ll> dp;
	vector<bool> cp;
	ll dfs(int v){
		if(dp[v] != -INF<ll>()) return dp[v];

		ll Mv = -INF<ll>();
		for(Edge<ll> p:revG[v]){
			int pv = p.to;ll c = p.cost;
			Mv = max(Mv,dfs(pv)+c);
		}
		return dp[v] = Mv;
	}

	void dfs2(int v){
		cp[v] = true;
		for(Edge<ll> p:revG[v]){
			int pv = p.to;ll c = p.cost;
			if(dp[v] == dp[pv] + c && !cp[pv]){
				dfs2(pv);
			}
		}
		return;
	}

	void run(){
		cin >> N >> M;
		revG = vector<vector<Edge<ll>>>(N);
		for(int i:range(M)){
			int a,b,c;cin >> a >> b >> c;
			revG[b].push_back({a,c});
		}

		dp = vector<ll>(N,-INF<ll>());
		dp[0] = 0;
		dfs(N-1);

		cp = vector<bool>(N);
		dfs2(N-1);

		int c = 0;for(bool b:cp)c+=b;
		cout << dp[N-1] << " " << N-c<<"/"<<N << endl;

	}
};

int main(){
	cout <<fixed<<setprecision(20);
	cin.tie(0);
	ios::sync_with_stdio(false);
	Main().run();
	return 0;
}

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結果

テストケース

ソースコード