#include<stdio.h> main() { int k,p,i,j; int sumNan=0,sumXp=0; scanf("%d %d",&k,&p); for(i=1;i<=k;i=i+1){ for(j=1;j<=p-1;j++){ sumNan=i*j+sumNan; } } for(i=2;i<=k;i=i+1){ for(j=1;j<=p-1;j++){ sumXp=i*j+sumXp; } } if((sumNan%p)>(sumNan%p)){ printf("YES"); } else{ printf("NO"); } } |
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