poj 2894 Ancient Keyboard

题意：一个键盘含'A'-'Z'26个键，每个键上都有一个状态转化功能，默认为off，根据on状态的键的数量输出字符。 If there are i LEDs on, the ith letter of the English alphabet is written on the tape. For example, if three LEDs are on at a time step, a letter 'C' is written on the tape.（不重复）。

代码：

#include <iostream>#include <cstdio>#include <cstring>using namespace std;int in[1001];int main(void){int t;scanf("%d",&t);while(t--){int i,n,mi=1009,ma=-1;char ch;int a,b;scanf("%d",&n);getchar();while(n--){scanf("%c %d %d", &ch,&a,&b);getchar();if(mi>a)mi = a;if(ma < b)ma = b;for(i=a; i<b; i++)in[i]++;}for(i=mi; i<ma; i++)if(in[i])printf("%c",in[i]-1+'A');printf("/n");memset(in,0,sizeof(in));}return 0;}