UVa 00661 - Blowing Fuses (simulation)

Link:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=602
Sol:

#include <cstdio>
	int main()
	{
	int n, m, c, t, currentCost, eachCost[21], currentCheck, maxCost, onesOn;
	t = 1;
	while (scanf("%d %d %d", &n, &m, &c), n)
	{
	for (int i = 0; i < n; ++i)
	{
	scanf("%d", &eachCost[i]);
	}
	currentCost = maxCost = onesOn = 0;
	while (m--)
	{
	scanf("%d", &currentCheck);
	if (maxCost <= c)
	{
	if (onesOn & (1 << currentCheck))
	currentCost -= eachCost[currentCheck - 1];
	else
	{
	currentCost += eachCost[currentCheck - 1];
	if (currentCost > maxCost)
	maxCost = currentCost;
	}
	onesOn ^= (1 << currentCheck);
	}
	}
	printf("Sequence %d\n", t);
	if (maxCost > c)
	printf("Fuse was blown.\n\n");
	else
	printf("Fuse was not blown.\nMaximal power consumption was %d amperes.\n\n", maxCost);
	++t;
	}
	}