#include#include #include #define MAXN 400using namespace std;int a[MAXN];void op(int & a);int main(){ //freopen("acm.acm","r",stdin); int time; int num; int i; int j; int begin; int end; memset(a,0,sizeof(a)); cin>>time; while(time --) { memset(a,0,sizeof(a)); cin>>num; for(i = 0; i < num; ++ i) { cin>>begin; cin>>end; if(begin > end) iter_swap(&begin,&end); begin = (begin-1)/2; end = (end-1)/2; for_each(a+begin,a+end+1,op); } cout<< 10*(*max_element(a,a+MAXN))<
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