Submission #400527

#	Time	Username	Problem	Language	Result	Execution time	Memory
400527		Falcon	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	57 / 100	1091 ms	2244 KiB

skyscraper

#pragma GCC optimize("O2")

#include <bits/stdc++.h>

#ifdef DEBUG
#include "debug.hpp"
#endif

using namespace std;

#define all(c)              (c).begin(), (c).end()
#define rall(c)             (c).rbegin(), (c).rend()
#define traverse(c, it)     for(auto it = (c).begin(); it != (c).end(); ++it)
#define rep(i, N)           for(int i = 0; i < (N); ++i)
#define rrep(i, N)          for(int i = (N) - 1; i >= 0; --i)
#define rep1(i, N)          for(int i = 1; i <= (N); ++i)
#define rep2(i, s, e)       for(int i = (s); i <= (e); ++i)
#define rep3(i, s, e, d)    for(int i = (s); (d) >= 0 ? i <= (e) : i >= (e); i += (d))

#ifdef DEBUG
#define debug(x...)         { \
                            ++dbg::depth; \
                            string dbg_vals = dbg::to_string(x); \
                            --dbg::depth; \
                            dbg::fprint(__func__, __LINE__, #x, dbg_vals); \
                            }

#define light_debug(x)      { \
                            dbg::light = true; \
                            dbg::dout << __func__ << ":" << __LINE__; \
                            dbg::dout << "  " << #x << " = " << x << endl; \
                            dbg::light = false; \
                            }
#else
#define debug(x...)         42
#define light_debug(x)      42
#endif


using ll = long long;

template<typename T>
inline T& ckmin(T& a, T b) { return a = a > b ? b : a; }

template<typename T>
inline T& ckmax(T& a, T b) { return a = a < b ? b : a; }


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    
    #ifdef DEBUG
    freopen("debug", "w", stderr);
    #endif

    int N, M; cin >> N >> M;
    vector<int> P(M), B(M);
    rep(i, M) cin >> B[i] >> P[i];
    vector<vector<int>> B_t(N);
    rep(i, M) B_t[B[i]].push_back(i);

    vector<int> dist(N, -1); dist[B[0]] = 0;
    vector<bool> vis(N);
    

    while(!vis[B[1]]) {
        int u = -1;
        rep(i, N)
            if(!vis[i] && dist[i] != -1 && (u == -1 || dist[i] < dist[u]))
                u = i;

        debug(u);
        if(u == -1) break;

        int d = dist[u];
        vis[u] = true;

        for(int v : B_t[u]) {
            for(int p = u % P[v]; p < N; p += P[v]) {
                debug(u, v, p);
                if(!vis[p]) {
                    int dp = d + abs(p - u)/ P[v];
                    if(dist[p] == -1 || dist[p] > dp)
                        dist[p] = dp;
                }
            }
        }
    }

    
    cout << (vis[B[1]] ? dist[B[1]] : -1) << '\n';

    #ifdef DEBUG
    dbg::dout << "\nExecution time: " << clock() * 1000 / CLOCKS_PER_SEC  << "ms" << endl;
    #endif

    return 0;
}

Compilation message (stderr)

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:35:29: warning: statement has no effect [-Wunused-value]
   35 | #define debug(x...)         42
      |                             ^~
skyscraper.cpp:73:9: note: in expansion of macro 'debug'
   73 |         debug(u);
      |         ^~~~~
skyscraper.cpp:35:29: warning: statement has no effect [-Wunused-value]
   35 | #define debug(x...)         42
      |                             ^~
skyscraper.cpp:81:17: note: in expansion of macro 'debug'
   81 |                 debug(u, v, p);
      |                 ^~~~~

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 21 / 21
• Subtask 5: 0 / 43