Submission #132839

#	Time	Username	Problem	Language	Result	Execution time	Memory
132839		duality	Worst Reporter 3 (JOI18_worst_reporter3)	C++11	100 / 100	522 ms	25664 KiB

worst_reporter3

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

int D[500000],p[500001];
struct group { int s,e,p; };
vector<group> groups;
int main() {
    int i;
    int N,Q;
    scanf("%d %d",&N,&Q);
    for (i = 0; i < N; i++) scanf("%d",&D[i]);

    p[0] = 1;
    for (i = 0; i < N; i++) {
        int x = (D[i]+p[i]-1)/p[i];
        p[i+1] = p[i]*x;
        if (p[i+1] > 1.1e9) p[i+1] = 1.1e9;
    }
    for (i = 0; i <= N; i++) {
        if ((i == 0) || (p[i] != p[i-1])) groups.pb((group){-i,-i,p[i]});
        else groups.back().s = -i;
    }

    int j,T,L,R;
    for (i = 0; i < Q; i++) {
        scanf("%d %d %d",&T,&L,&R);
        int ans = 0;
        for (j = 0; j < groups.size(); j++) {
            int x = (T/groups[j].p)*groups[j].p;
            int s = max(groups[j].s+x,L),e = min(groups[j].e+x,R);
            if (s <= e) ans += e-s+1;
        }
        printf("%d\n",ans);
    }

    return 0;
}

Compilation message (stderr)

worst_reporter3.cpp: In function 'int main()':
worst_reporter3.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < groups.size(); j++) {
                     ~~^~~~~~~~~~~~~~~
worst_reporter3.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&N,&Q);
     ~~~~~^~~~~~~~~~~~~~~
worst_reporter3.cpp:17:34: 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",&D[i]);
                             ~~~~~^~~~~~~~~~~~
worst_reporter3.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d",&T,&L,&R);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81