제출 #926494

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
926494		Boycl07	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	100 / 100	84 ms	12488 KiB

skyscraper

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define rep(i, n) for(int i = 1; i <= n; ++i)
#define forn(i, l, r) for(int i = l; i <= r; ++i)
#define ford(i, r, l) for(int i = r; i >= l; --i)
#define FOR(i, n) for(int i = 0; i < n; ++i)
#define FORD(i, n) for(int i = n - 1; i >= 0; --i)
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define endl "\n"
#define task "skycrapers"
#define sz(a) int(a.size())
#define C(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define bit(i, mask) (mask >> i & 1)

template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }

inline int readInt()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();int n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ll readLong()       {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll  n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline string readString() {char c;while(c=getchar(),c==' '||c=='\n'||c=='\t');string s({c});while(c=getchar(),c!=EOF&&c!=' '&&c!='\n'&&c!='\t')s+=c;return s;}


const int N =  1e5 + 10;
const int M = 1e3 + 3;
const int N1 = 2e3 + 10;
const int K = 1e2 + 1;
const int MOD = 1e9 + 7;
const int INF = 1e9 + 3;
const ll LINF = 1e17 + 2;
const int block_size = 500;
const int LOG = 40;
const int offset = N;
const int LIM = 11 ;
const int AL = 26;

int n, m, s, t;

set<int> doges[N];
int d[N];

void solve()
{
    cin >> n >> m;

    FOR(i, m)
    {
        int x, y;
        cin >> x >> y;
        doges[x].insert(y);
        if(i == 0) s = x;
        else if(i == 1) t = x;
    }

    priority_queue<pii, vector<pii>, greater<pii>> pq;
    FOR(i, n) d[i] = INF;
    d[s] = 0; pq.push({0, s});
    while(!pq.empty())
    {
        pii tmp = pq.top();
        pq.pop();

        int u = tmp.se, dist = tmp.fi;
        if(d[u] != dist) continue;
        if(u == t) return cout << dist, void();

        for(int p : doges[u])
        {
            for(int j = 1; u + p * j < n; ++j)
            {
                int v = u + p * j;
                if(minimize(d[v], d[u] + j))
                    pq.push({d[v], v});
                if(doges[v].find(p) != doges[v].end()) break;
            }
            for(int j = 1; u - p * j >= 0; ++j)
            {
                int v = u - p * j;
                if(minimize(d[v], d[u] + j))
                    pq.push({d[v], v});
                if(doges[v].find(p) != doges[v].end()) break;
            }
        }
    }
    cout << -1;



}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int TC = 1;

    if(fopen(task".inp", "r"))
    {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }


    while(TC--)
    {
        solve();
        cout << endl;
    }

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:108:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:109:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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