#include <stdio.h>
int main(void) {
int a=0,sum=0;
while( sum < 1000){
a = a + 1;
sum = sum + a;
}
printf("%dを足した直後に初めて1000をこえる",a
); return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbWFpbih2b2lkKSB7CiAgICBpbnQgYT0wLHN1bT0wOwogICAgd2hpbGUoIHN1bSA8IDEwMDApewogICAgICAgIGEgPSBhICsgMTsKICAgICAgICBzdW0gPSBzdW0gKyBhOwogICAgfQogICAgcHJpbnRmKCIlZOOCkui2s+OBl+OBn+ebtOW+jOOBq+WIneOCgeOBpjEwMDDjgpLjgZPjgYjjgosiLGEpOwoJcmV0dXJuIDA7Cn0=