func_code_string: #include <bits/stdc++.h>   using namespace std;   struct Pnt {     int x, y;     Pnt() {}     Pnt(int _x, int _y) {       x = _x;       y = _y;     }     bool operator<(const Pnt& o) const {       if (x != o.x) return x < o.x;       return y < o.y;     }     void show() { printf( Pnt %d %d n , x, y); }   };   const int MAXN = 1000005;   const int MAXS = 20;   const int dx[] = {1, 0, -1, 0};   const int dy[] = {0, 1, 0, -1};   int n, m;   char s[MAXN];   int f[MAXN][2];   void preGao() {}   void init() {     if (scanf( %s , s) == EOF) exit(0);     n = strlen(s);   }   void work() {     f[n][0] = 0;     f[n][1] = 2;     for (int i = n - 1; i >= 0; i--) {       f[i][0] = f[i + 1][0] + (s[i] ==  1 );       f[i][0] = min(f[i][0], f[i + 1][1]);       f[i][1] = f[i + 1][0] + 2 + (s[i] ==  0 );       f[i][1] = min(f[i][1], f[i + 1][1] + (s[i] ==  0 ));     }     printf( %d n , min(f[0][0], f[0][1]));   }   int main() {     preGao();     while (true) {       init();       work();     }     return 0;   }   