View Compilation Error

0_0_36544230_30633.cpp: In function 'int main()':
0_0_36544230_30633.cpp:71:34: error: 'len' was not declared in this scope
             for ( int i = 1; i < len; i++ ) {
                                  ^
0_0_36544230_30633.cpp:72:28: error: 's' was not declared in this scope
                 if ( query(s[j].substr(0, i)) && query(s[j].substr(i, len)) ) {
                            ^
0_0_36544230_30633.cpp:72:45: error: 'query' was not declared in this scope
                 if ( query(s[j].substr(0, i)) && query(s[j].substr(i, len)) ) {
                                             ^