제출 #112695

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
112695		arnold518	물통 (KOI17_bucket)	C++14	100 / 100	236 ms	16464 KiB

bucket

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const ll MAXN = 1e6;

int a, b, c, d;
struct Queue { int x, y, v; };
unordered_map<ll, int> vis;

queue<Queue> Q;

void enque(Queue p)
{
    if(vis.count(p.x*MAXN+p.y)) return;
    vis[p.x*MAXN+p.y]=p.v;
    Q.push(p);
}

int main()
{
    int i, j;
    scanf("%d%d%d%d", &a, &b, &c, &d);

    enque({0, 0, 0});
    while(!Q.empty())
    {
        Queue now=Q.front();
        Q.pop();

        int s=now.x+now.y;
        Queue nxt; nxt.v=now.v+1;

        nxt.y=min(s, b); nxt.x=s-nxt.y; enque(nxt);
        nxt.x=min(s, a); nxt.y=s-nxt.x; enque(nxt);
        nxt.x=a; nxt.y=now.y; enque(nxt);
        nxt.x=now.x; nxt.y=b; enque(nxt);
        nxt.x=0; nxt.y=now.y; enque(nxt);
        nxt.x=now.x; nxt.y=0; enque(nxt);
    }
    if(vis.count(c*MAXN+d)) printf("%d", vis[c*MAXN+d]);
    else printf("-1");
}

컴파일 시 표준 에러 (stderr) 메시지

bucket.cpp: In function 'int main()':
bucket.cpp:25:9: warning: unused variable 'i' [-Wunused-variable]
     int i, j;
         ^
bucket.cpp:25:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
bucket.cpp:26:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d", &a, &b, &c, &d);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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