QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#755025 | #7781. Sheep Eat Wolves | bexiaohe | WA | 0ms | 3720kb | C++14 | 2.2kb | 2024-11-16 16:16:58 | 2024-11-16 16:17:03 |
Judging History
answer
#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const int N = 2e5 + 5;
int n, m, k, x, y, T = 1, p, q;
int f_la,f_lb,f_ra,f_rb;
#define zy if(l_a<=0){break;}
void solve()
{
cin >> x >> y >> p >> q;
int l_a = x, l_b = y, r_a = 0, r_b = 0;
f_la=l_a,f_lb=l_b,f_ra=r_a,f_rb=r_b;
int ans = 0;
bool judge = 1;
while (l_a > 0) {
if (l_a <= p&&judge==1) {
++ans;
cout << ans << endl;
return;
}
++ans;
if (judge == 1) {
int tt = l_a - l_b + q;
if (tt == 0) {
int tmp = p;
if(tmp<2){
cout<<"-1"<<endl;
return;
}
int kk = tmp / 2;
kk = min({ kk,l_a,l_b });
tmp -= kk * 2;
l_a -= kk, l_b -= kk, r_a += kk, r_b += kk;zy
if (l_b == 0 && tmp != 0) {
kk=min(tmp,l_a);
r_a += kk;
l_a -= kk;
zy
}
}
else if (tt < 0) {
int tmp = p;
int kk = min({ tmp,abs(tt) });
tt += kk;
tmp -= kk;
l_b -= kk, r_b += kk;
if (tt < 0) {
cout << "-1" << endl;
return;
}
kk = tmp / 2;
kk = min({ kk,l_a,l_b });
tmp -= kk * 2;
l_a -= kk, l_b -= kk, r_a += kk, r_b += kk;
zy
if (l_b == 0 && tmp != 0) {
kk=min(tmp,l_a);
r_a += kk;
l_a -= kk;
zy
}
}
else if (tt > 0) {
int tmp = p;
int kk = min({ tmp,tt,l_a });
l_a -= kk, r_a += kk;
tmp -= kk;
tt -= kk;zy
kk = tmp / 2;
kk = min({ kk,l_a,l_b });
tmp -= kk * 2;
l_a -= kk, l_b -= kk, r_a += kk, r_b += kk;zy
if (l_b == 0 && tmp != 0) {
kk=min(tmp,l_a);
r_a += kk;
l_a -= kk;
zy
}
}
if(f_la==l_a&&f_lb==l_b&&f_ra==r_a&&f_rb==r_b){
cout<<"-1"<<endl;
return;
}
else{
f_la=l_a,f_lb=l_b,f_ra=r_a,f_rb=r_b;
}
}
else if (judge == 0) {
if (r_a != 0) {
int tt = r_a - r_b + q;
if (tt < 0) {
int tmp = p;
int kk = min({ r_b,tmp,abs(tt) });
tt += kk, r_b -= kk, l_b += kk;
if (tt < 0) {
cout << "-1" << endl;
return;
}
}
}
}
if (judge == 1)judge = 0;
else judge = 1;
}
cout << ans << endl;
}
int main()
{
ios::sync_with_stdio(false), cin.tie(0);
//cin >> T;
while (T--) solve();
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 0ms
memory: 3588kb
input:
4 4 3 1
output:
3
result:
ok 1 number(s): "3"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3720kb
input:
3 5 2 0
output:
5
result:
ok 1 number(s): "5"
Test #3:
score: 0
Accepted
time: 0ms
memory: 3712kb
input:
2 5 1 1
output:
-1
result:
ok 1 number(s): "-1"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3660kb
input:
1 1 1 0
output:
1
result:
ok 1 number(s): "1"
Test #5:
score: -100
Wrong Answer
time: 0ms
memory: 3664kb
input:
3 3 1 1
output:
-1
result:
wrong answer 1st numbers differ - expected: '7', found: '-1'