Submission #133902

#	Time	Username	Problem	Language	Result	Execution time	Memory
133902		duality	Candies (JOI18_candies)	C++11	100 / 100	169 ms	11052 KiB

candies

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;

int A[200000];
int l[200001],r[200001];
LLI rs[200001];
priority_queue<pair<LLI,pii> > H;
int main() {
    int i;
    int N;
    scanf("%d",&N);
    for (i = 0; i < N; i++) scanf("%d",&A[i]);

    LLI ans = 0;
    for (i = 0; i <= N; i++) {
        l[i] = i-1,r[i] = i+1;
        if (i < N) rs[i] = A[i],H.push(mp(A[i],mp(i,i+1)));
    }
    while (!H.empty()) {
        int a = H.top().second.first,b = H.top().second.second;
        LLI d = H.top().first;
        H.pop();

        if ((r[a] != b) || (l[b] != a)) continue;
        ans += d,printf("%lld\n",ans);
        if (l[a] != -1) r[l[a]] = r[b];
        if (r[b] != N+1) l[r[b]] = l[a];
        if ((l[a] != -1) && (r[b] != N+1)) {
            H.push(mp(rs[l[a]]-d+rs[b],mp(l[a],r[b])));
            rs[l[a]] = rs[l[a]]-d+rs[b];
        }
    }

    return 0;
}

Compilation message (stderr)

candies.cpp: In function 'int main()':
candies.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
     ~~~~~^~~~~~~~~
candies.cpp:18:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < N; i++) scanf("%d",&A[i]);
                             ~~~~~^~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 92 / 92