11576 - Scrolling message/11576.cpp

   1 using namespace std;
   2 #include <algorithm>
   3 #include <iostream>
   4 #include <iterator>
   5 #include <sstream>
   6 #include <fstream>
   7 #include <numeric>
   8 #include <cassert>
   9 #include <climits>
  10 #include <cstdlib>
  11 #include <cstring>
  12 #include <string>
  13 #include <cstdio>
  14 #include <vector>
  15 #include <cmath>
  16 #include <queue>
  17 #include <deque>
  18 #include <stack>
  19 #include <list>
  20 #include <map>
  21 #include <set>
  22
  23 #define foreach(x, v) for (typeof (v).begin() x = (v).begin(); x != (v).end(); ++x)
  24 #define For(i, a, b) for (int i=(a); i<(b); ++i)
  25 #define D(x) cout << #x " is " << x << endl
  26
  27 int main(){
  28   int casos;
  29   cin >> casos;
  30   while (casos--){
  31     int n, w;
  32     cin >> n >> w;
  33     int ans = 0;
  34     string prev(n, ' ');
  35     for (int i=0; i<w; ++i){
  36       string s;
  37       cin >> s;
  38       ans += n;
  39       for (int i=0; i<n; ++i){
  40         if (s.find(prev.substr(i)) == 0){
  41           ans -= n - i;
  42           break;
  43         }
  44       }
  45       prev = s;
  46     }
  47     cout << ans << endl;
  48   }
  49   return 0;
  50 }