Submission #126466

#	Time	Username	Problem	Language	Result	Execution time	Memory
126466		letrongdat	Sirni (COCI17_sirni)	C++17	112 / 140	5143 ms	574368 KiB

sirni

#include <bits/stdc++.h>
using namespace std;
#define forn(i, a, b)               for(int i=a; i<=b; ++i)
#define ford(i, a ,b)               for(int i=a; i>=b; --i)
#define repn(i, a, b)               for(int i=a; i <b; ++i)
typedef pair<int, int> ii;
const int maxM = 1e7+ 10;
const int maxN = 1e5 +10;
int N;
int Near[maxM];
int lab[maxN];
vector<int> P;
vector<ii> Edge[maxM];
int root(int u) {
    if (lab[u] < 0) return u;
    return lab[u] = root(lab[u]);
}
void join(int u, int v) {
    int l1 = root(u), l2 = root(v);
    if (lab[l1] > lab[l2]) swap(l1, l2);
    lab[l1] += lab[l2];
    lab[l2] = l1;
}
int main() {
// #ifndef ONLINE_JUDGE
//     freopen("a.inp", "r", stdin);
// #endif // ONLINE_JUDGE
    ios::sync_with_stdio(0);
    memset(lab, -1, sizeof lab);
    cin >> N;
    P.resize(N);
    repn(i, 0, N) cin >> P[i];
    sort(P.begin(), P.end());
    P.resize(unique(P.begin(), P.end()) - P.begin());
    memset(Near, 0x3f, sizeof Near);
    repn(i, 0, P.size()) Near[P[i]] = i;
    ford(i, P.back(), 0) Near[i] = min(Near[i], Near[i+1]);
    repn(i, 0, P.size() -1) {
        int weight = P[Near[P[i]+1]] - P[i];
        if (weight < P[i]) Edge[weight].push_back({i, Near[P[i]+1]});
        for(int j = 2*P[i]; j <= P.back(); j += P[i]) {
            int weight = P[Near[j]] - j;
            if (weight < P[i]) Edge[weight].push_back({i, Near[j]});
        }
    }
    long long result = 0;
    repn(i, 0, maxM) {
        for(auto &e: Edge[i]) if (root(e.first) == root(e.second)) continue;
            else { result += i; join(e.first, e.second); }
    }
    cout << result;
}

Compilation message (stderr)

sirni.cpp: In function 'int main()':
sirni.cpp:5:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define repn(i, a, b)               for(int i=a; i <b; ++i)
sirni.cpp:36:10:
     repn(i, 0, P.size()) Near[P[i]] = i;
          ~~~~~~~~~~~~~~                             
sirni.cpp:36:5: note: in expansion of macro 'repn'
     repn(i, 0, P.size()) Near[P[i]] = i;
     ^~~~
sirni.cpp:5:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define repn(i, a, b)               for(int i=a; i <b; ++i)
sirni.cpp:38:10:
     repn(i, 0, P.size() -1) {
          ~~~~~~~~~~~~~~~~~                          
sirni.cpp:38:5: note: in expansion of macro 'repn'
     repn(i, 0, P.size() -1) {
     ^~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 14 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14