题意:给你两个数,求所有的数位的积的和。
析:太水了,没的说,可以先输入边算,也可以最后再算,一样。。
代码如下:
#include <cstdio> #include <string> #include <cstdlib> #include <cmath> #include <iostream> #include <cstring> #include <set> #include <queue> #include <algorithm> #include <vector> #include <map> using namespace std ; typedef long long LL; typedef pair<int, int> P; const int INF = 0x3f3f3f3f; const double inf = 0x3f3f3f3f3f3f3f; const double eps = 1e-8; const int maxn = 1000 + 5; const int dr[] = {0, 0, -1, 1}; const int dc[] = {-1, 1, 0, 0}; int m, n; inline bool is_in(int r, int c){ return r >= 0 && r < n && c >= 0 && c < m; } int main(){ while(scanf("%d %d", &n, &m) == 2){ int a[15], b[15]; int cnt1 = 0, cnt2 = 0; while(n){ a[cnt1++] = n % 10; n /= 10; } while(m){ b[cnt2++] = m % 10; m /= 10; } int ans = 0; for(int i = 0; i < cnt1; ++i) for(int j = 0; j < cnt2; ++j) ans += a[i] * b[j]; printf("%d ", ans); } return 0; }