45 lines
799 B
Plaintext
45 lines
799 B
Plaintext
// test correctness of loop optimize
|
|
// be careful with input data since it may causes undefined behavior
|
|
|
|
int min(int a,int b){
|
|
if(a<b){
|
|
return a;
|
|
}else{
|
|
return b;
|
|
}
|
|
}
|
|
|
|
int f(int x){
|
|
int t1 = min(x,2147483647-x);
|
|
int t2 = min(t1,1073741823-t1);
|
|
int t3 = min(t2,536870912-t2);
|
|
return (t3+t3*3/1000*1001)%19491001;
|
|
}
|
|
|
|
const int mod = 998244853;
|
|
|
|
int loop_test(int s,int t,int d){
|
|
int sum = 0;
|
|
int x = s;
|
|
while (x < t) {
|
|
sum = (sum + f(x)) % mod;
|
|
x =x+ d;
|
|
}
|
|
return sum;
|
|
}
|
|
|
|
int main(){
|
|
int T = getint();
|
|
starttime();
|
|
while(T){
|
|
int s = getint();
|
|
int t = getint();
|
|
int d = getint();
|
|
putint(loop_test(s,t,d));
|
|
putch(10);
|
|
T = T-1;
|
|
}
|
|
stoptime();
|
|
return 0;
|
|
|
|
} |