Description
讀入兩個不超過25位的火星正整數A和B,計算A+B。需要注意的是:在火星上,整數不是單一進制的,第n位的進制就是第n個素數。例如:地球上的10進制數2,在火星上記為“1,0”,因為火星個位數是2進制的;地球上的10進制數38,在火星上記為“1,1,1,0”,因為火星個位數是2進制的,十位數是3進制的,百位數是5進制的,千位數是7進制的……Input
測試輸入包含若干測試用例,每個測試用例占一行,包含兩個火星正整數A和B,火星整數的相鄰兩位數用逗號分隔,A和B之間有一個空格間隔。當A或B為0時輸入結束,相應的結果不要輸出。Output
對每個測試用例輸出1行,即火星表示法的A+B的值。Sample Input
1,0 2,1 4,2,0 1,2,0 1 10,6,4,2,1 0 0Sample Output
1,0,1 1,1,1,0 1,0,0,0,0,0 個人感想 這道題測試了很多次,忘掉等號開以及字符數組太小等問題浪費了時間 source http://acm.hust.edu.cn/vjudge/contest/view.action?cid=89340#problem/D#include <stdio.h> #include <math.h> #include <string.h> int prime(int x) { int flag = 1; for(int i = 2; i <= sqrt(x); i++) { if(x % i == 0) { flag = 0; break; } } return flag; } int main() { int p[30], top = 0, len1, len2, num1[30], num2[30], ans[30]; char str1[1000], str2[1000]; for(int i = 2; top < 25; i++) { if(prime(i)) { p[top++] = i; //printf("%d\n\n", p[top-1]); } } while(~scanf("%s%s", str1, str2)) { if(strcmp(str1, "0") == 0 || strcmp(str2, "0") == 0) break; memset(num1, 0, sizeof(num1)); memset(num2, 0, sizeof(num2)); memset(ans, 0, sizeof(ans)); top = 0; int k = 1, cnt; len1 = strlen(str1); len2 = strlen(str2); /*for(int i = 0; i < len1; i++) { printf("%c:%c\n", str1[i], str2[i]); } printf("\n\n"); */ //printf("len1 = %d len2 = %d\n", len1, len2); for(int i = len1 - 1; i >= 0; i--) { if(str1[i] == ',') { top++; k = 1; continue; } num1[top] += (str1[i] - '0') * k; //printf("i = %d : num1[%d] = %d\n\n", i, top, num1[top]); k = k*10; } cnt = top+1; //printf("cnt = %d\n", cnt); top = 0; k = 1; for(int i = len2 - 1; i >= 0; i--) { if(str2[i] == ',') { top++; k = 1; continue; } num2[top] += (str2[i] - '0') * k; //printf("i = %d : num2[top] = %d\n\n", i, top, num2[top]); k = k*10; } if(top+1 > cnt) cnt = top+1; //printf("cnt = %d\n", cnt); for(int i = 0; i < cnt; i++) { ans[i] += num1[i] + num2[i]; while(ans[i] >= p[i] && p[i] != 0) { ans[i+1] += ans[i] / p[i]; ans[i] %= p[i]; } //printf("ans[%d] = %d, num1[%d] = %d, num2[%d] = %d\n", i, ans[i], i, num1[i], i, num2[i]); k = i+1; } if(ans[k]) printf("%d,", ans[k]); for(int i = cnt-1; i > 0; i--) printf("%d,", ans[i]); printf("%d\n", ans[0]); } }