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poj 1165 The Primes

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poj 1165 The Primes

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <algorithm>using namespace std;int sum, fir;const int MAX = 100000;const int SQRT = 318;bool v[MAX] = {1,1};bool n[11][11][11][11][11] = {0};int a[5];int pri[MAX];int priLen = 0;int maze[5][5];bool vis[5][5];struct ANS{short ma[5][5];}ans[1000];int ansLen = 0;bool operator<(const ANS& a1, const ANS& a2){for (int i = 0; i < 5; ++ i) {for (int j = 0; j < 5; ++ j) {if (a1.ma[i][j] < a2.ma[i][j]) {return 1;}else if (a1.ma[i][j] > a2.ma[i][j]) {return 0;}}}return 0;}#define FOR(i) for(ii[i]=0;ii[i]<2;++ii[i]){if(ii[i]==0)aa[i]=a[i];else aa[i]=10;inline void deal(int k){int tmp = 0;for (int j = 4; j >= 0; -- j) {tmp += a[j] = k%10;k /= 10;}if (tmp != sum) {return;}int ii[5];int aa[5];FOR(0)FOR(1)FOR(2)FOR(3)FOR(4)n[aa[0]][aa[1]][aa[2]][aa[3]][aa[4]]=1;}}}}}}void init(){scanf("%d%d",∑,&fir);n[10][10][10][10][10]=1;for (int i = 0; i < 5; ++ i) {for (int j = 0; j < 5; ++ j) {maze[i][j] = 10;}}maze[0][0] = fir;priLen = 0;ansLen = 0;for (int i = 2; i < SQRT; ++ i) {if (!v[i]) {for (int j = i*i; j < MAX; j += i) {v[j] = 1;}}}for (int i = 10001; i < MAX; ++ i) {if (!v[i]) {pri[priLen++] = i;deal(i);}}}inline bool is_prime(){return n[a[0]][a[1]][a[2]][a[3]][a[4]];}int dir[25][2] = {{0,0},{0,1},{0,2},{0,3},{0,4},{1,0},{2,0},{3,0},{4,0},{1,1},{2,2},{3,3},{4,4},{1,2},{1,3},{1,4},{3,2},{4,2},{2,3},{4,3},{4,1},{2,1},{2,4},{3,1},{3,4}};inline bool ok(){for (int i = 0; i < 5; ++ i) {for (int j = 0; j < 5; ++ j) {a[j] = maze[i][j];}if (!is_prime()) {return 0;}}for (int j = 0; j < 5; ++ j) {for (int i = 0; i < 5; ++ i) {a[i] = maze[i][j];}if (!is_prime()) {return 0;}}for (int i = 0; i < 5; ++ i) {a[i] = maze[i][i];}if (!is_prime()) {return 0;}for (int i = 4, j = 0; j < 5; -- i, ++ j) {a[j] = maze[i][j];}if (!is_prime()) {return 0;}else {return 1;}}void print(){for (int i = 0; i < 5; ++ i) {for (int j = 0; j < 5; ++ j) {if (maze[i][j] == 10) printf(" ");else printf("%d",maze[i][j]);}printf("n");}printf("# # # # # # # # #n");}void dfs(int id){if (id == 25) {for (int i = 0; i < 5; ++ i) {for (int j = 0; j < 5; ++ j) {ans[ansLen].ma[i][j] = maze[i][j];}}++ ansLen;return;}int x=dir[id][0],y=dir[id][1];for (int i = 0; i < 10; ++ i) {maze[x][y] = i;if (ok()) {dfs(id+1);}}maze[x][y] = 10;}int main(){init();dfs(1);sort(ans, ans+ansLen);for (int k = 0; k < ansLen; ++ k) {for (int i = 0; i < 5; ++ i) {for (int j = 0; j < 5; ++ j) {printf("%d",ans[k].ma[i][j]);}printf("n");}printf("n");}return 0;}
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