Wrong Answer
foo.cc: In function 'int main()':
foo.cc:32:22: warning: array subscript is below array bounds [-Warray-bounds]
s[i][j]=(s[i][j-1]+d[i][j])%mod;
~~~~~~~~^
foo.cc: In function 'int main()':
foo.cc:32:22: warning: array subscript is below array bounds [-Warray-bounds]
s[i][j]=(s[i][j-1]+d[i][j])%mod;
~~~~~~~~^
