View Compilation Error

0_0_33735380_24794.cpp: In function 'int main()':
0_0_33735380_24794.cpp:87:21: error: 'm1' was not declared in this scope
    if(mp1.find(s1)==m1.end())mp1[s1]=++nx;
                     ^
0_0_33735380_24794.cpp:88:21: error: 'm2' was not declared in this scope
    if(mp2.find(s2)==m2.end())mp2[s2]=++ny;
                     ^