为什么这么打表RE

#include<bits/stdc++.h>
using namespace std;
int l,r,cnt;
int a[10010] = {1852,1856,1860,1864,1868,1872,1876,1880,1884,1888,1892,1896,1904,1908,1912,1916,1920,1924,1928,1932,1936,1940,1944,1948,1952,1956,1960,1964,1968,1972,1976,1980,1984,1988,1992,1996,2000,2004,2008,2012,2016,2020,2024,2028,2032,2036,2040,2044,2048,2052,2056,2060,2064,2068,2072,2076,2080,2084,2088,2092,2096,2104,2108,2112,2116,2120,2124,2128,2132,2136,2140,2144,2148,2152,2156,2160,2164,2168,2172,2176,2180,2184,2188,2192,2196,2204,2208,2212,2216,2220,2224,2228,2232,2236,2240,2244,2248,2252,2256,2260,2264,2268,2272,2276,2280,2284,2288,2292,2296,2304,2308,2312,2316,2320,2324,2328,2332,2336,2340,2344,2348,2352,2356,2360,2364,2368,2372,2376,2380,2384,2388,2392,2396,2400,2404,2408,2412,2416,2420,2424,2428,2432,2436,2440,2444,2448,2452,2456,2460,2464,2468,2472,2476,2480,2484,2488,2492,2496,2504,2508,2512,2516,2520,2524,2528,2532,2536,2540,2544,2548,2552,2556,2560,2564,2568,2572,2576,2580,2584,2588,2592,2596,2604,2608,2612,2616,2620,2624,2628,2632,2636,2640,2644,2648,2652,2656,2660,2664,2668,2672,2676,2680,2684,2688,2692,2696,2704,2708,2712,2716,2720,2724,2728,2732,2736,2740,2744,2748,2752,2756,2760,2764,2768,2772,2776,2780,2784,2788,2792,2796,2800,2804,2808,2812,2816,2820,2824,2828,2832,2836,2840,2844,2848,2852,2856,2860,2864,2868,2872,2876,2880,2884,2888,2892,2896,2904,2908,2912,2916,2920,2924,2928,2932,2936,2940,2944,2948,2952,2956,2960,2964,2968,2972,2976,2980,2984,2988,2992,2996}; 
int main(){
	cin>>l>>r;
	int len = sizeof(a);
	for(int i = l;i<=r;i++){
		for(int j = 1;j<=len;j++){
			if(i == a[j]){
				cnt++;
			}
		}
	}
	cout<<cnt<<"\n";
	for(int i = l;i<=r;i++){
		for(int j = 1;j<=len;j++){
			if(i == a[j]){
				cout<<a[j]<<" ";
			}
		}
	} 
	

	return 0;
}