Submission #968129

#	Time	Username	Problem	Language	Result	Execution time	Memory
968129		PM1	Spiral (BOI16_spiral)	C++17	15 / 100	1 ms	348 KiB

spiral

#include <bits/stdc++.h>
using namespace std;
#define  ll long long
const int mxn=1e9+5,M=1e9+7;
int n,q;
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin>>n>>q;
	while(q--){
		ll x,y,xx,yy;
		cin>>y>>x>>yy>>xx;
		ll w=max(abs(x),abs(y));
		ll z=(w*2+1)%M,zz=(z*z)%M;
		if(-w==x){
			assert((zz-(w-y)+M*2)%M >=0);
			cout<<(zz-(w-y)+M*2)%M<<'\n';
			continue;
		}
		zz-=z;
		zz+=M;
		zz%=M;
		if(-w==y){
			assert((zz-(x+w-1)+M*2)%M >=0);
			cout<<(zz-(x+w-1)+M*2)%M<<'\n';
			continue;
		}
		zz-=z-1;
		zz+=M;
		zz%=M;
		if(x==w){
			assert((zz-(y+w-1)+M*2)%M >=0);
			cout<<(zz-(y+w-1)+M*2)%M<<'\n';
			continue;
		}
		zz-=z-1;
		zz+=M;
		zz%=M;
		assert((zz-(w-1-x)+M*2)%M >=0);
		cout<<(zz-(w-1-x)+M*2)%M<<'\n';

	}
	return 0;
}

• Subtask 1: 0 / 12
• Subtask 2: 15 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 31
• Subtask 5: 0 / 25