View Compilation Error

0_0_17905770_14997.cpp: In function 'int main()':
0_0_17905770_14997.cpp:15:4: error: 'cin' was not declared in this scope
    cin>>str+1;
    ^
0_0_17905770_14997.cpp:21:49: error: 'min' was not declared in this scope
         dp[i][1] = min(dp[i-1][1]+1,dp[i-1][0]+2);
                                                 ^
0_0_17905770_14997.cpp:25:46: error: 'min' was not declared in this scope
      dp[i][0] = min(dp[i-1][0]+1,dp[i-1][1]+2);
                                              ^
0_0_17905770_14997.cpp:29:42: error: 'min' was not declared in this scope
    int temp = min(dp[len][0],dp[len][1]+1);
                                          ^