#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() ({long _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define WTHI(v) {unsigned _z=v,_n=0;ulong _d=0;while(++_n,_d=_d<<8|0x30|_z%10,_z/=10);*(ulong*)wp=_d;wp+=_n;}
#define WTLO(v) {unsigned _z=v,_n=8;ulong _d=0;while(_d=_d<<8|0x30|_z%10,_z/=10,--_n);*(ulong*)wp=_d;wp+=8;}
#define wt(v) if(v>=100000000){WTHI(v/100000000);WTLO(v);}else{WTHI(v);}

typedef unsigned long ulong;

int inverse(int a,int p){
	int b=p;
	int u=1;
	int v=0;
	while(b){
		int q=a/b,t;
		t=b, b=a-q*b, a=t;
		t=v, v=u-q*v, u=t;
	}
	if(u<0){
		u+=p;
	}
	return u;
}

char wbuf[1<<25];

int main(){
	rd_init();
	rd_skip();
	unsigned m=rd();
	unsigned p=rd();
	rd_skip();
	char*wp=wbuf;
	while(*rp){
		unsigned x=rd();
		unsigned f=rd();
		unsigned z=x%p?m/p+(((ulong)f*inverse(x,p)+p-1)%p<m%p):f?0:m;
		wt(z);
		*wp++='\n';
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}