#include<stdio.h>
int main(){
int N,X,Y,i,j,sum = 0;
scanf("%d", &N);
for(i = 1; i <= N; i++){
scanf("%d%d", &X, &Y);
if(X > Y){
for(j = Y+1,sum = 0; j < X; j++){
if(j % 2 != 0){
sum += j;
}
}
}else if(X <= Y){
for(j = X+1,sum = 0; j < Y; j++){
if(j % 2 != 0){
sum += j;
}
}
}
printf("%d
", sum);
}
return 0;
}
#include<stdio.h>
int main(){
int A,N,sum = 0,i;
scanf("%d%d", &A, &N);
while(N < 0 || N == 0){
scanf("%d", &N);
}
for(i = 0; i < N; i++){
sum = sum + A + i;
}
printf("%d
", sum);
return 0;
}
#include<stdio.h>
int main(){
double M[12][12],sum = 0;
int i,j,counter = 1;
char O[2];
scanf("%s", O);
for(i = 0; i < 12; i++){
for(j = 0; j < 12; j++){
scanf("%lf", &M[i][j]);
}
}
for(i = counter; i < 12; i++){
for(j = 0; j < counter; j++){
sum += M[i][j];
}
counter++;
}
if(O[0] == 'S'){
printf("%.1lf
", sum);
}else if(O[0] == 'M'){
printf("%.1lf
", sum / 66.0);
}
return 0;
}