LuoguP1016 旅行家的预算（贪心）

胡一个错误代码都能有75pts

忘了怎么手写deque其实是懒

#include <cstdio>

#include <iostream>

#include <cstring>

#include <algorithm>

#include <cmath>

#define R(a,b,c) for(register int a = (b); (a) <= (c); ++(a))

#define nR(a,b,c) for(register int a = (b); (a) >= (c); --(a))

#define Fill(a,b) memset(a, b, sizeof(a))

#define Max(a,b) ((a) > (b) ? (a) : (b))

#define Min(a,b) ((a) < (b) ? (a) : (b))

#define Swap(a,b) ((a) ^= (b) ^= (a) ^= (b))

//#define ON_DEBUGG

#ifdef ON_DEBUGG

#define D_e_Line printf("\n----------\n")

#define D_e(x) cout << (#x) << " : " << x << endl

#define Pause() system("pause")

#define FileOpen() freopen("in.txt", "r", stdin)

#else

#define D_e_Line ;

#define D_e(x) ;

#define Pause() ;

#define FileOpen() ;

#endif

using namespace std;

struct ios{

	template<typename ATP>inline ios& operator >> (ATP &x){

		x = 0; int f = 1; char ch;

		for(ch = getchar(); ch < '0' || ch > '9'; ch = getchar()) if(ch == '-') f = -1;

		while(ch >= '0' && ch <= '9') x = x * 10 + (ch ^ '0'), ch = getchar();

		x *= f;

		return *this;

	}

}io;

template<typename ATP>inline ATP max(ATP &a, ATP &b){

	return a > b ? a : b;

}

#include <deque>

struct Petrol {

    double cost, volume;

};

deque<Petrol> dq;

double dis[17], price[17];

int main() {

FileOpen();

	double totDis, fuelMax, dx;

	int n;

    scanf("%lf%lf%lf%lf%d", &totDis, &fuelMax, &dx, &price[0], &n);

    R(i,1,n){

        scanf("%lf%lf", &dis[i], &price[i]);

        if(dis[i] - dis[i - 1] > fuelMax * dx){

            printf("No Solution\n");

            return 0;

        }

    }

    dis[n+1] = totDis;

    double fuelNow = fuelMax;

    dq.push_back((Petrol){price[0], fuelMax});

    double ans = price[0] * fuelMax;

    R(i,1,i + 1){

        double costFuel = (dis[i] - dis[i - 1]) / dx;

        while(!dq.empty() && costFuel > 0){

            Petrol x = dq.front(); dq.pop_front();

            if(x.volume > costFuel){

                fuelNow -= costFuel;

                dq.push_front((Petrol){x.cost, x.volume - costFuel});

                break;

            }

            fuelNow -= x.volume;

			costFuel -= x.volume;

        }

        if(i == n + 1){

            while(!dq.empty()) {

                ans -= dq.front().cost * dq.front().volume;

                dq.pop_front();

            }

            break;

        }

        while(!dq.empty() && dq.back().cost > price[i]){

            ans -= dq.back().cost * dq.back().volume;

            fuelNow -= dq.back().volume;

            dq.pop_back();

        }

        ans += (fuelMax - fuelNow) * price[i];

        dq.push_back((Petrol){price[i], fuelMax - fuelNow});

        fuelNow = fuelMax;

    }

    printf("%.2lf\n", ans);

    return 0;

}

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LuoguP1016 旅行家的预算（贪心）

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巴特西

LuoguP1016 旅行家的预算 （贪心）

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LuoguP1016 旅行家的预算（贪心）