#include <stdio.h>

int prime[1230]={
2,
3,5,
7,11,13,
17,19,23,29,
31,37,41,43,47,
53,59,61,67,71,73,
79,83,89,97,101,103,107,
109,113,127,131,137,139,149,151,
157,163,167,173,179,181,191,193,197,
199,211,223,227,229,233,239,241,251,257,
263,269,271,277,281,283,293,307,311,
313,317,331,337,347,349,353,359,
367,373,379,383,389,397,401,
409,419,421,431,433,439,
443,449,457,461,463,
467,479,487,491,
499,503,509,
521,523,
541,
547,557,
563,569,571,
577,587,593,599,
601,607,613,617,619,
631,641,643,647,653,659,
661,673,677,683,691,701,709,
719,727,733,739,743,751,757,761,
769,773,787,797,809,811,821,823,827,
829,839,853,857,859,863,877,881,883,887,
907,911,919,929,937,941,947,953,967,
971,977,983,991,997,1009,1013,1019,
1021,1031,1033,1039,1049,1051,1061,
1063,1069,1087,1091,1093,1097,
1103,1109,1117,1123,1129,
1151,1153,1163,1171,
1181,1187,1193,
1201,1213,
1217,
1223,1229,
1231,1237,1249,
1259,1277,1279,1283,
1289,1291,1297,1301,1303,
1307,1319,1321,1327,1361,1367,
1373,1381,1399,1409,1423,1427,1429,
1433,1439,1447,1451,1453,1459,1471,1481,
1483,1487,1489,1493,1499,1511,1523,1531,1543,
1549,1553,1559,1567,1571,1579,1583,1597,1601,1607,
1609,1613,1619,1621,1627,1637,1657,1663,1667,
1669,1693,1697,1699,1709,1721,1723,1733,
1741,1747,1753,1759,1777,1783,1787,
1789,1801,1811,1823,1831,1847,
1861,1867,1871,1873,1877,
1879,1889,1901,1907,
1913,1931,1933,
1949,1951,
1973,
1979,1987,
1993,1997,1999,
2003,2011,2017,2027,
2029,2039,2053,2063,2069,
2081,2083,2087,2089,2099,2111,
2113,2129,2131,2137,2141,2143,2153,
2161,2179,2203,2207,2213,2221,2237,2239,
2243,2251,2267,2269,2273,2281,2287,2293,2297,
2309,2311,2333,2339,2341,2347,2351,2357,2371,2377,
2381,2383,2389,2393,2399,2411,2417,2423,2437,
2441,2447,2459,2467,2473,2477,2503,2521,
2531,2539,2543,2549,2551,2557,2579,
2591,2593,2609,2617,2621,2633,
2647,2657,2659,2663,2671,
2677,2683,2687,2689,
2693,2699,2707,
2711,2713,
2719,
2729,2731,
2741,2749,2753,
2767,2777,2789,2791,
2797,2801,2803,2819,2833,
2837,2843,2851,2857,2861,2879,
2887,2897,2903,2909,2917,2927,2939,
2953,2957,2963,2969,2971,2999,3001,3011,
3019,3023,3037,3041,3049,3061,3067,3079,3083,
3089,3109,3119,3121,3137,3163,3167,3169,3181,3187,
3191,3203,3209,3217,3221,3229,3251,3253,3257,
3259,3271,3299,3301,3307,3313,3319,3323,
3329,3331,3343,3347,3359,3361,3371,
3373,3389,3391,3407,3413,3433,
3449,3457,3461,3463,3467,
3469,3491,3499,3511,
3517,3527,3529,
3533,3539,
3541,
3547,3557,
3559,3571,3581,
3583,3593,3607,3613,
3617,3623,3631,3637,3643,
3659,3671,3673,3677,3691,3697,
3701,3709,3719,3727,3733,3739,3761,
3767,3769,3779,3793,3797,3803,3821,3823,
3833,3847,3851,3853,3863,3877,3881,3889,3907,
3911,3917,3919,3923,3929,3931,3943,3947,3967,3989,
4001,4003,4007,4013,4019,4021,4027,4049,4051,
4057,4073,4079,4091,4093,4099,4111,4127,
4129,4133,4139,4153,4157,4159,4177,
4201,4211,4217,4219,4229,4231,
4241,4243,4253,4259,4261,
4271,4273,4283,4289,
4297,4327,4337,
4339,4349,
4357,
4363,4373,
4391,4397,4409,
4421,4423,4441,4447,
4451,4457,4463,4481,4483,
4493,4507,4513,4517,4519,4523,
4547,4549,4561,4567,4583,4591,4597,
4603,4621,4637,4639,4643,4649,4651,4657,
4663,4673,4679,4691,4703,4721,4723,4729,4733,
4751,4759,4783,4787,4789,4793,4799,4801,4813,4817,
4831,4861,4871,4877,4889,4903,4909,4919,4931,
4933,4937,4943,4951,4957,4967,4969,4973,
4987,4993,4999,5003,5009,5011,5021,
5023,5039,5051,5059,5077,5081,
5087,5099,5101,5107,5113,
5119,5147,5153,5167,
5171,5179,5189,
5197,5209,
5227,
5231,5233,
5237,5261,5273,
5279,5281,5297,5303,
5309,5323,5333,5347,5351,
5381,5387,5393,5399,5407,5413,
5417,5419,5431,5437,5441,5443,5449,
5471,5477,5479,5483,5501,5503,5507,5519,
5521,5527,5531,5557,5563,5569,5573,5581,5591,
5623,5639,5641,5647,5651,5653,5657,5659,5669,5683,
5689,5693,5701,5711,5717,5737,5741,5743,5749,
5779,5783,5791,5801,5807,5813,5821,5827,
5839,5843,5849,5851,5857,5861,5867,
5869,5879,5881,5897,5903,5923,
5927,5939,5953,5981,5987,
6007,6011,6029,6037,
6043,6047,6053,
6067,6073,
6079,
6089,6091,
6101,6113,6121,
6131,6133,6143,6151,
6163,6173,6197,6199,6203,
6211,6217,6221,6229,6247,6257,
6263,6269,6271,6277,6287,6299,6301,
6311,6317,6323,6329,6337,6343,6353,6359,
6361,6367,6373,6379,6389,6397,6421,6427,6449,
6451,6469,6473,6481,6491,6521,6529,6547,6551,6553,
6563,6569,6571,6577,6581,6599,6607,6619,6637,
6653,6659,6661,6673,6679,6689,6691,6701,
6703,6709,6719,6733,6737,6761,6763,
6779,6781,6791,6793,6803,6823,
6827,6829,6833,6841,6857,
6863,6869,6871,6883,
6899,6907,6911,
6917,6947,
6949,
6959,6961,
6967,6971,6977,
6983,6991,6997,7001,
7013,7019,7027,7039,7043,
7057,7069,7079,7103,7109,7121,
7127,7129,7151,7159,7177,7187,7193,
7207,7211,7213,7219,7229,7237,7243,7247,
7253,7283,7297,7307,7309,7321,7331,7333,7349,
7351,7369,7393,7411,7417,7433,7451,7457,7459,7477,
7481,7487,7489,7499,7507,7517,7523,7529,7537,
7541,7547,7549,7559,7561,7573,7577,7583,
7589,7591,7603,7607,7621,7639,7643,
7649,7669,7673,7681,7687,7691,
7699,7703,7717,7723,7727,
7741,7753,7757,7759,
7789,7793,7817,
7823,7829,
7841,
7853,7867,
7873,7877,7879,
7883,7901,7907,7919,
7927,7933,7937,7949,7951,
7963,7993,8009,8011,8017,8039,
8053,8059,8069,8081,8087,8089,8093,
8101,8111,8117,8123,8147,8161,8167,8171,
8179,8191,8209,8219,8221,8231,8233,8237,8243,
8263,8269,8273,8287,8291,8293,8297,8311,8317,8329,
8353,8363,8369,8377,8387,8389,8419,8423,8429,
8431,8443,8447,8461,8467,8501,8513,8521,
8527,8537,8539,8543,8563,8573,8581,
8597,8599,8609,8623,8627,8629,
8641,8647,8663,8669,8677,
8681,8689,8693,8699,
8707,8713,8719,
8731,8737,
8741,
8747,8753,
8761,8779,8783,
8803,8807,8819,8821,
8831,8837,8839,8849,8861,
8863,8867,8887,8893,8923,8929,
8933,8941,8951,8963,8969,8971,8999,
9001,9007,9011,9013,9029,9041,9043,9049,
9059,9067,9091,9103,9109,9127,9133,9137,9151,
9157,9161,9173,9181,9187,9199,9203,9209,9221,9227,
9239,9241,9257,9277,9281,9283,9293,9311,9319,
9323,9337,9341,9343,9349,9371,9377,9391,
9397,9403,9413,9419,9421,9431,9433,
9437,9439,9461,9463,9467,9473,
9479,9491,9497,9511,9521,
9533,9539,9547,9551,
9587,9601,9613,
9619,9623,
9629,
9631,9643,
9649,9661,9677,
9679,9689,9697,9719,
9721,9733,9739,9743,9749,
9767,9769,9781,9787,9791,9803,
9811,9817,9829,9833,9839,9851,9857,
9859,9871,9883,9887,9901,9907,9923,9929,
9931,9941,9949,9967,9973
};

int main()
{
	int num, i, count, j, n;
	while(scanf("%d", &num) == 1 && num)
	{
		count = 0;
		for (i=0; i<1230; i++)
		{
			if (num <= prime[i])
			{
				break;
			}
		}
		if (num == prime[i])
		{
			count++;
		}
		while(i>0)
		{
			n = num;
			j = i--;
			while(j>0 && (n-prime[j-1])>=0)
			{
				n-=prime[j-1];
				if (n < 0)
				{
					break;
				}
				else if (n==0)
				{
					count++;
				}
				j--;
			}
		}
		printf("%d\n", count);
	}
	return 0;
}
很悲剧滴贡献了一次WA,原因在于我自己测试了10000，9999这样的数据，看到输出是1，头一下就懵了，赶紧在循环之前加了个条件
if（num>9973）
{
    printf("0\n");
}
真悲剧啊.

• Re:贴下代码 (8) angrad 2011-03-12 11:43:43