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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#89474 | #5259. Skills in Pills | yyyyxh | WA | 3ms | 3736kb | C++14 | 1.1kb | 2023-03-20 09:50:28 | 2023-03-20 09:50:31 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
int read(){
char c=getchar();int x=0;
while(c<48||c>57) c=getchar();
do x=(x<<1)+(x<<3)+(c^48),c=getchar();
while(c>=48&&c<=57);
return x;
}
int n,a,b,tx,ty,ta,tb,g;
int exgcd(int a,int b,int &x,int &y){
if(!b){x=1;y=0;return a;}
int d=exgcd(b,a%b,y,x);
y-=(a/b)*x;
return d;
}
typedef long long ll;
int jump(int u,int v){
if((v-u)%g) return 0x3f3f3f3f;
ll x=(ll)tx*(v-u)/g;
ll y=(ll)ty*(v-u)/g;
int sx=x%tb;
if(sx<=0) sx+=tb;
int sy=y%ta;
if(sy>=0) sy-=ta;
return max(v+b*-sy,u+a*sx);
}
const int N=1000003;
int f[N][2];
bool vis[N][2];
int dp(int xs,bool t){
if(vis[xs][t]) return f[xs][t];
vis[xs][t]=1;
int u=xs,v=xs;
if(t) --u;else --v;
int x=jump(u,v);
if(x>n) return f[xs][t]=(n-u)/a+(n-v)/b+2;
return f[xs][t]=min(dp(x,0)+(x-u-2)/a+(x-v-1)/b,dp(x,1)+(x-u-1)/a+(x-v-2)/b)+2;
}
int main(){
a=read();b=read();n=read();
g=exgcd(a,b,tx,ty);ta=a/g;tb=b/g;
int x=jump(0,0);
printf("%d\n",min(dp(x,0)+(x-2)/a+(x-1)/b,dp(x,1)+(x-1)/a+(x-2)/b));
//for(auto cur:mp) printf("%d %d %d\n",cur.first.first,cur.first.second,cur.second);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 3524kb
input:
3 9 20
output:
8
result:
ok single line: '8'
Test #2:
score: 0
Accepted
time: 2ms
memory: 3708kb
input:
8 2 12
output:
7
result:
ok single line: '7'
Test #3:
score: 0
Accepted
time: 3ms
memory: 3544kb
input:
2 5 15
output:
10
result:
ok single line: '10'
Test #4:
score: -100
Wrong Answer
time: 2ms
memory: 3736kb
input:
10 8 13
output:
4
result:
wrong answer 1st lines differ - expected: '2', found: '4'