Cod sursa(job #185775)

Utilizator tm_raduToma Radu tm_radu Data 26 aprilie 2008 00:04:43
Problema Buline Scor 20
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.84 kb
#include <stdio.h>
#define NM 400002

int n, i, j, k, h;
long long int st[NM], s[NM];
int a[NM], pos[NM];
int p, u, smax, stot;

int main()
{
	freopen("buline.in", "r", stdin);
	freopen("buline.out", "w", stdout);
	scanf("%d", &n);
	for ( i = 1; i <= n; i++ )
		scanf("%d %d", &a[i], &j),
		a[i] = (j == 0 ? -a[i] : a[i]),
		a[i+n] = a[i],
		stot += a[i];
	p = u = 1, smax = a[1];
	pos[1] = 1;
	for ( i = 1; i <= 2*n; i++ )
	{
		st[i] = st[i-1] + a[i];
		if ( s[i-1] <= 0 ) s[i] = a[i], pos[i] = i;
		else               s[i] = s[i-1] + a[i], pos[i] = pos[i-1];
		if ( smax < s[i] && i-pos[i]+1 <= n ) smax = s[i], p = (pos[i]-1)%n+1, u = i-pos[i]+1;
		if ( i >= n && smax < st[i] - st[i-n] ) smax = st[i] - st[i-n], p = (i-n)%n+1, u = n;
	}
    printf("%d %d %d\n", smax, p, u);
    
    return 0;
}