#include<cstdio>
//#include<windows.h>

int N,R=0;
long double r=0;
int a[2000], b[2000];

void Input(){
	FILE *In = fopen("profit.in","r");
	fscanf(In,"%i",&N);
	for(int i=1; i<=N; i++){		
			fscanf(In,"%i %i", &a[i], &b[i]);		
	}
	fclose(In);
}
void Output(){
	FILE *Out = fopen("profit.out","w");
	fprintf(Out,"%i",R);
	fclose(Out);
}

int main(){
	long double v=0;
	Input();
	for(int i=1; i<=N; i++){
		v = ((long double)a[i])/b[i];
		if(v > r) { r=v; R=i;}
	}

	if(!R) R=1;
	Output();
	return 0;
}<!-- 0.0399s -->