ACM小技巧(持续更新)

1. INF

const int INF=0x3f3f3f3f;
memset(arr,0x3f,arr);

const int NINF=0xc0c0c0c0;
memset(arr,0xc0,arr);

2. 行内空格,行末换行

for (int i=0;i<n;i++) {
    printf("%d%c",arr[i]," \n"[i==n-1]);
}