Submission #204461

#	Time	Username	Problem	Language	Result	Execution time	Memory
204461		14kg	물통 (KOI17_bucket)	C++11	0 / 100	6 ms	380 KiB

bucket

#include <stdio.h>
#include <queue>
#include <map>
#include <algorithm>
#include <stdlib.h>
#define min2(x,y) (x<y?x:y)

using namespace std;
map<pair<int,int>,bool> check;
queue<pair<pair<int,int>,int> > Q;
int A, B, MA, MB, lev;

void Push(int x, int y){
    if(!check[{x,y}]){
        check[{x,y}]=true, Q.push({{x,y},lev+1});
        if(x==MA && y==MB) printf("%d",lev+1), exit(true);
    }
}
int main(){
    pair<int,int> x;

    scanf("%d %d %d %d",&A,&B,&MA,&MB);

    check[{0,0}]=true, Q.push({{0,0},0});
    if(MA==0 && MB==0){ printf("0"); return 0; }
    while(!Q.empty()){
        x=Q.front().first, lev=Q.front().second, Q.pop();

        Push(0,x.second), Push(x.first,0);
        Push(A,x.second), Push(x.first,B);
        Push(x.first-min2(x.first,B-x.second),x.second+min2(x.first,B-x.second));
        Push(x.first+min2(x.second,A-x.first),x.second-min2(x.second,A-x.first));
    }
    printf("-1");
}

Compilation message (stderr)

bucket.cpp: In function 'int main()':
bucket.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d",&A,&B,&MA,&MB);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 14
• Subtask 3: 0 / 34
• Subtask 4: 0 / 43