View Compilation Error

0_0_18462928_13197.cpp: In function 'void solve()':
0_0_18462928_13197.cpp:90:16: error: 'inf' was not declared in this scope
     dp[j][k] = inf ;
                ^
0_0_18462928_13197.cpp:102:53: error: 'inf' was not declared in this scope
    for ( int k = 0 ; k < m ; ++ k ) if ( dp[j][k] < inf ) {
                                                     ^
0_0_18462928_13197.cpp:125:22: error: 'inf' was not declared in this scope
      if ( dp[x][k] < inf && ~dp2[x + 1][-del + k] ) {
                      ^