#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd_init() char*rp=({char*mmap();mmap(0l,1l<<25,1,2,0,0ll);})
#define rd_skip() while(*rp++>=48)
#define rd() ({int _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define wthi(v) {unsigned _z=v,_n=0;long _d=0;while(++_n,_d=_d<<8|0x30|_z%10,_z/=10);*(long*)wp=_d;wp+=_n;}
#define wtlo(v) {unsigned _z=v,_n=8;long _d=0;while(_d=_d<<8|0x30|_z%10,_z/=10,--_n);*(long*)wp=_d;wp+=8;}
#define wt(v) if(v>=100000000){wthi(v/100000000);wtlo(v%100000000);}else{wthi(v);}
#define repeat(e) for(typeof(e)_=e;_--;)

char wbuf[1<<25];

int main(){
	char*wp=wbuf;
	rd_init();
	rd_skip();
	int m=rd();
	unsigned p=1000000000;
	int q=10000000;
	int x=0;
	repeat(m){
		unsigned a=rd();
		if(a!=p+q){
			wthi(q);
			*wp++='\n';
			wt(a);
			*wp++=' ';
			p=a;
			q=0;
			++x;
		}
		++q;
	}
	wthi(q);
	int wlen=wp-wbuf;
	wp=wbuf;
	wthi(x);
	while(wp<wbuf+8){
		*wp++=' ';
	}
	write(1,wbuf,wlen);
	_exit(0);
}