#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 wt(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 repeat(e) for(typeof(e)_=e;_--;)

typedef unsigned long ulong;

char wbuf[1<<25];

int main(){
	char*wp=wbuf;
	rd_init();
	rd_skip();
	unsigned y=rd();
	double invy=1./y+1e-20;
	int n=rd();
	repeat(n){
		long u=rd()-1;
		long v=rd()-1;
		if(u<0){
			unsigned vq=v*invy;
			wt(v-vq*y+1);
		}else{
			unsigned uq=u*invy;
			unsigned vq=v*invy;
			if(uq-vq){
				wt(u-uq*y+v-vq*y+2);
			}else{
				wt(v-u);
			}
		}
		*wp++='\n';
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}