제출 #405008

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
405008		Hazem	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	100 / 100	998 ms	225564 KiB

skyscraper

#include <bits/stdc++.h>
using namespace std;
 
#define LL long long
#define F first
#define S second
#define pii pair<int,int>
#define piii pair<pair<int,int>,int>

const int N = 3e4+10;
const int M = 3e2+10;
const LL INF = 1e9;
const LL LINF = 2e18;
const LL MOD = 1e9+7;   
const double PI = 3.141592653589793;

bool vis[N][N];
queue<pair<int,int>>que;
vector<int>vec[N];
int n,m,vis1[N],cnt;

int bfs(int st,int end){

    que.push({st-1,0});
    
    while(!que.empty()){
        
        int u = que.front().F%max(n,m)+1,dis = que.front().S;
        int p = que.front().F/max(n,m);

        if(u==end)
            return dis;

        que.pop();

        vec[u].push_back(p);

        int sz = vec[u].size();
        for(int i=vis1[u]?sz-1:0;i<sz;i++){
            int x = vec[u][i];
            if(u-x>=1)
                if(!vis[u-x][x])
                    que.push({u-x-1+x*max(n,m),dis+1}),vis[u-x][x] = 1,cnt++;
            
            if(u+x<=n)
                if(!vis[u+x][x])
                    que.push({u+x-1+x*max(n,m),dis+1}),vis[u+x][x] = 1,cnt++;
        }

        vec[u].pop_back();
        vis1[u] = 1;
    }

    return -1;
}

int main(){

    //freopen("out.txt","w",stdout);
    //freopen("doge_5_18.in","r",stdin);

    scanf("%d%d",&n,&m);
    int start,end;

    for(int i=1;i<=m;i++){
        int p,pos;
        scanf("%d%d",&pos,&p);
        pos++;
        vec[pos].push_back(p);

        if(i==1)start = pos;
        if(i==2)end = pos;
    }
    
    assert(start>=1&&start<=n&&end>=1&&end<=n);
    printf("%d\n",bfs(start,end));
    //printf("%d\n",cnt);
}   

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:67:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         scanf("%d%d",&pos,&p);
      |         ~~~~~^~~~~~~~~~~~~~~~
skyscraper.cpp:76:11: warning: 'end' may be used uninitialized in this function [-Wmaybe-uninitialized]
   76 |     printf("%d\n",bfs(start,end));
      |     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:76:11: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 21 / 21
• Subtask 5: 43 / 43