void solve(int n, int q, char *s1, char *s2, int *q_x, int *q_y, int *q_len, unsigned *ans) { int s[3000000]; s[0]=s1[0]<s2[0]&&s2[0]!=2; for(int i=1;i<n;i++)s[i]=s[i-1]+(s1[0]<s2[0]&&s2[0]!=2); for(int i=0;i<q;i++)ans[i]=s[q_y[i]]-s[q_x[i]-1]; }
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