#include <stdio.h>
#include <string.h>
#include <math.h>

#define PI 3.141592

struct dil{
    int delka;
    float x;
    float y;
    int uhel;
    };

dil dily[10000];

void rot(int a,float& x, float& y)
{
    float ox=x,oy=y;
    x = ox*cos(a*PI/180)+oy*sin(a*PI/180);
    y = -ox*sin(a*PI/180)+oy*cos(a*PI/180);
}

int main(void)
{
int poc_dilu,comm;
while(1){
scanf("%d %d\n",&poc_dilu,&comm);
//printf("%d %d\n",poc_dilu,comm);
for(int i=0;i<poc_dilu;i++)
{
    scanf("%f ",&dily[i].y);
    if(i>0) dily[i].y += dily[i-1].y;
    dily[i].x=0;
//    dily[i].uhel=0;
//    dily[i].x = dily[i].y=0;
}
for(int i=0;i<comm;i++)
{
    int d,uhel;
    scanf("%d %d\n",&d,&uhel);
//    uhel += 90;
//    for(int j=d;j<poc_dilu;j++)
//        dily[d].uhel += uhel;

//    float x=dily[d].x,y=dily[d].y,u=dily[d].uhel;
    for(int j=d;j<poc_dilu;j++)
    {
/*	dily[j-1].uhel += uhel;
	dily[j].x += (float)dily[j-1].delka * -cos((float)dily[j-1].uhel*3.141592/180);
	dily[j].y += (float)dily[j-1].delka * sin((float)dily[j-1].uhel*3.141592/180);
*/
//	printf("%f %f %f\n",x,y,u);
/*	float polomer = sqrt(((dily[j].x - dily[d-1].x) * 
	(dily[j].x - dily[d-1].x)) +((dily[j].y - dily[d-1].y) * 
	(dily[j].y - dily[d-1].y))  ) ;
*/	
//	printf("r = %f\n",polomer); 
	float xx= dily[j].x - dily[d-1].x;
	float yy= dily[j].y - dily[d-1].y;
	rot(uhel, xx,yy);
	dily[j].x = dily[d-1].x + xx;	
//	printf("sinus %f\n",polomer * sin((float)uhel*3.141592/180));
	dily[j].y = dily[d-1].y + yy;
    }
    printf("%.2f %.2f\n",dily[poc_dilu-1].x,dily[poc_dilu-1].y);    
    
/*    for(int k =0;k<poc_dilu;k++) {
	printf("%d %f %f\n",k,dily[k].x,dily[k].y);
    }*/
}
char b[100];
//gets(b);
printf("\n");
if(feof(stdin)) break;
}
return 0;
}