Submission #27209

#	Time	Username	Problem	Language	Result	Execution time	Memory
27209		TAMREF	Min-cost GCD (GA9_mcg)	C++11	57 / 100	356 ms	2024 KiB

mcg

#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ll;
const int mx=300;
ll x,y,p,q;
ll eu[mx], dp[2*mx];
int E;
void workgcd(ll u, ll v){
    eu[E++]=v;
    if(!v) return;
    workgcd(v,u%v);
}
int main(){
    int T;
    for(scanf("%d",&T);T--;){
        scanf("%lld%lld%lld%lld",&x,&y,&p,&q);
        ll g=__gcd(x,y);
        x/=g, y/=g;
        E=0;
        fill(dp,dp+2*mx,0);
        eu[E++]=max(x,y);
        workgcd(max(x,y),min(x,y));
        for(int i=E-3;i>=0;i--){
            dp[2*i]=min(dp[2*i+2]+p,dp[2*i+3]+q*(eu[i]/eu[i+1]));
            dp[2*i+1]=min(dp[2*i+2]+q*(eu[i]/eu[i+1]),dp[2*i]+p);
        }
        printf("%lld\n",x>=y?dp[0]:dp[1]);
    }
}

Compilation message (stderr)

mcg.cpp: In function 'int main()':
mcg.cpp:15:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(scanf("%d",&T);T--;){
                       ^
mcg.cpp:16:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld%lld%lld",&x,&y,&p,&q);
                                              ^

• Subtask 1: 14 / 14
• Subtask 2: 16 / 16
• Subtask 3: 27 / 27
• Subtask 4: 0 / 43