UVa : 10324 (Zeros and Ones)



// http://uva.onlinejudge.org/external/103/10324.html
// Runtime: 0.028s
// Tag: accumulated sum

// @BEGIN_OF_SOURCE_CODE

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <list>
#include <vector>
#include <map>
#include <sstream>
#include <cmath>
#include <bitset>
#include <utility>
#include <set>
#include <numeric>

#define INF_MAX 2147483647
#define INF_MIN -2147483647
#define pi acos(-1.0)
#define N 1000000
#define LL long long

#define For(i, a, b) for( int i = (a); i < (b); i++ )
#define Fors(i, sz) for( size_t i = 0; i < sz.size (); i++ )
#define Fore(it, x) for(typeof (x.begin()) it = x.begin(); it != x.end (); it++)
#define Set(a, s) memset(a, s, sizeof (a))
#define Read(r) freopen(r, "r", stdin)
#define Write(w) freopen(w, "w", stdout)

int dr [] = {-1, -1, 0, 1, 1, 1, 0, -1};
int dc [] = {0, 1, 1, 1, 0, -1, -1, -1};

using namespace std;

char ch [N + 5];
int a [N + 5];

int main ()
{
    int cases = 0;

    while ( gets (ch) ) {

        int len = strlen (ch);

        if ( len == 0 ) break;

        a [0] = ch [0] == '1' ? 1 : 0;

        for ( int i = 1; i < len; i++ )
            a [i] = ch [i] == '1' ? a [i - 1] + 1 : a [i - 1];

        int n; scanf ("%d", &n);
        printf ("Case %d:\n", ++cases);

        while ( n-- ) {
            int p, q; scanf ("%d %d", &p, &q);

            if ( p > q ) swap (p, q);

            if ( ch [p] == '0' && ch [q] == '0' && a [q] - a [p] == 0 ) printf ("Yes\n");
            else if ( ch [p] == '1' && ch [q] == '1' && a [q] - a [p] == q - p ) printf ("Yes\n");
            else printf ("No\n");
        }

        getchar ();
    }
	return 0;
}

// @END_OF_SOURCE_CODE
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