include<iostream>

include<cstdio>

include<cmath>

include<cstring>

using namespace std; bool e[ 20000 ]; int prime[ 5300 ],len = 0; void find_prime(int n) { if( n <= 10 ) { prime[ 0 ] = 2; prime[ 1 ] = 3; prime[ 2 ] = 5; prime[ 3 ] = 7; e[ 1 ] = e[ 4 ] = e[ 6 ] = e[ 8 ] = e[ 9 ] = e[ 10 ] = false; len = 4; return ; } else { int l = sqrt( n ); find_prime( l ); for( int i = 0; i < len; i++ ) { int num = prime[ i ], m = n / prime[i]; for( int j = 2; j <= m; j++) { if( e[ j num ] == true ) e[ j num ] = false; } } for( int i = l + 1; i <= n; i++ ) { if( e[ i ] == true ) prime[ len ++ ] = i; } return ; } } int main() { memset( e, true, sizeof(e) ); find_prime(20000); int n; //printf( "%d %d\n", e[ 3 ], e[ 2003 ]); //bool bo = true; scanf( "%d", &n ); for(int i = 0; i < len; i++ ) { int a = prime[ i ]; for(int j = i; j < len; j++) { int b = prime[ j ]; int c = n - a - b; //printf( "%d %d %d\n", a, b, c ); if( e[ c ] == true && c >= 2 ) { printf( "%d %d %d\n", a, b, c ); return 0;
} } } return 0; } 告诉我输出了一个0，我明明从2开始遍历的 报错全是像这样： column 1 read 0 expected 3 求助