9.14 百度B卷前两题AC（CPP版本）
1.倒转乘法表
#include <bits/stdc++.h>
using namespace std;
int rev(int in) {
int out = 0;
while (in) {
out = out * 10 + in % 10;
in /= 10;
}
return out;
}
int main () {
int N, K;
cin >> N >> K;
int ret = 0;
for (int i = 1; i <= K; i++) {
int cur = rev(N * i);
if (cur > ret) ret = cur;
}
cout << ret << endl;
return 0;
} 2.共同区间 #include <bits/stdc++.h>
using namespace std;
int main () {
string str;
cin >> str;
int l = 0, r = str.size() - 1;
int lc = l, rc = r;
while (l < rc && str[l] != str[rc]) rc--;
while (lc < r && str[lc] != str[r]) lc++;
if (rc - l < r - lc) {
cout << lc + 1 << " " << r << " " << lc + 2 << " " << r + 1 << endl;
} else {
cout << l + 1 << " " << rc << " " << l + 2 << " " << rc + 1 << endl;
}
return 0;
} 
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