学步园

Maybe you are familiar with the following situation. You have plugged in a lot of electrical devices, such as toasters, refrigerators, microwave ovens, computers, stereos, etc, and have them all running. But at the moment when you
turn on the TV, the fuse blows, since the power drawn from all the machines is greater than the capacity of the fuse. Of course this is a great safety feature, avoiding that houses burn down too often due to fires ignited by overheating wires. But it is also
annoying to walk down to the basement (or some other inconvenient place) to replace to fuse or switch it back on.

What one would like to have is a program that checks before turning on an electrical device whether the combined power drawn by all running devices exceeds the fuses capacity (and it blows), or whether it is safe to turn it on.

The input consists of several test cases. Each test case describes a set of electrical devices and gives a sequence of turn on/off operations for these devices.

The first line of each test case contains three integers n, m and c, where n is the number of devices (n <= 20), m the number of operations performed on these devices and c is the capacity of the fuse (in Amperes). The following n lines contain one positive
integer ci each, the consumption (in Amperes) of the i-th device.

This is followed by m lines also containing one integer each, between 1 and n inclusive. They describe a sequence of turn on/turn off operations performed on the devices. For every number, the state of that particular devices is toggled, i.e. if it is currently
running, it is turned off, and if it is currently turned off, it will by switched on. At the beginning all devices are turned off.

The input will be terminated by a test case starting with n = m = c = 0. This test case should not be processed.

For each test case, first output the number of the test case. Then output whether the fuse was blown during the operation sequence. The fuse will be blown if the sum of the power consumptions ci of turned on devices at some point
exceeds the capacity of the fuse c.

If the fuse is not blown, output the maximal power consumption by turned on devices that occurred during the sequence.

Output a blank line after each test case.

2 2 10
5
7
1
2
3 6 10
2
5
7
2
1
2
3
1
3
0 0 0

Sequence 1
Fuse was blown.

Sequence 2
Fuse was not blown.
Maximal power consumption was 9 amperes.

#include<stdio.h>
int main()
{
    int n,m,c,flog,n1[22],n2[22],m1,i,sum,max,k=0;
    while(scanf("%d%d%d",&n,&m,&c)==3)
    {
                            //c为最大用量
        if(n==0&&m==0&&c==0)
        break;
        for(i=1;i<=n;i++)//n2为0和1分别代表电器处于关闭状态和开启状态
        n2[i]=0;

        for(i=1;i<=n;i++)
        scanf("%d",&n1[i]);
        
        flog=1;sum=max=0;//每个电器的用量
        for(i=1;i<=m;i++)
        {
            scanf("%d",&m1);
            if(n2[m1]==1)//第m1个电器处于开启状态,则关闭
            {
                sum-=n1[m1];n2[m1]=0;
            }
            else    //第m1个电器处于关闭状态,则开启
            {
                sum+=n1[m1];n2[m1]=1;
                if(sum>max)//找出最大时电器的用量
                max=sum;
            }

            if(sum>c)//说明电器总用量超过最大用量
            flog=0;
        }
        printf("Sequence %d\n",++k);
        if(flog)
        {
            printf("Fuse was not blown.\n");
            printf("Maximal power consumption was %d amperes.\n\n",max);
        }
        else
        printf("Fuse was blown.\n\n");

    }
    return 0;
}