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# include int main() {    int n, i, sum = 0;    while(scanf("%d", &n)!=EOF) {        for(i=1; i<=n; ++i)            sum = sum + i;        printf("%d\n\n", sum);        sum = 0;    }    retur

#include int main(void){ int a,b; while(scanf("%d%d",&a,&b)!=EOF) printf("%d\n",a+b); return 0;}

#include#includeint shu(char a){ return (a-'0');}int main(){ char a[1000],b[1000]; int num[1001]; int n,i,j=1,al,bl,k,t; scanf("%d",&n); while(n--) { if(j!=1)