./Main.c:1:8: warning: multi-character character constant [-Wmultichar]
char m[' '];
^
./Main.c:2:1: warning: data definition has no type or storage class
a[110],b[110],i,j,g=-1,s=1,M=1e9+7,k,n;
^
./Main.c:2:1: warning: type defaults to ‘int’ in declaration of ‘a’ [-Wimplicit-int]
./Main.c:2:8: warning: type defaults to ‘int’ in declaration of ‘b’ [-Wimplicit-int]
a[110],b[110],i,j,g=-1,s=1,M=1e9+7,k,n;
^
./Main.c:2:15: warning: type defaults to ‘int’ in declaration of ‘i’ [-Wimplicit-int]
a[110],b[110],i,j,g=-1,s=1,M=1e9+7,k,n;
^
./Main.c:2:17: warning: type defaults to ‘int’ in declaration of ‘j’ [-Wimplicit-int]
a[110],b[110],i,j,g=-1,s=1,M=1e9+7,k,n;
^
./Main.c:2:19: warning: type defaults to ‘int’ in declaration of ‘g’ [-Wimplicit-int]
a[110],b[110],i,j,g=-1,s=1,M=1e9+7,k,n;
^
./Main.c:2:24: warning: type defaults to ‘int’ in declaration of ‘s’ [-Wimplicit-int]
a[110],b[110],i,j,g=-1,s=1,M=1e9+7,k,n;
...