Submission #158656

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
158656	2019-10-18 09:39:42	PeppaPig	Street Lamps (APIO19_street_lamps)	C++14	100 / 100	1645 ms	76484 KiB

street_lamps

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#include <bits/stdc++.h>
#define iii tuple<int, int, int>
using namespace std;
const int N = 3e5+5;
void update(vector<int> &t, int x, int k) {
    for(int i = x; i < t.size(); i += i & -i)
        t[i] += k;
}
int query(vector<int> &t, int x) {
    int ret = 0;
    for(int i = x; i; i -= i & -i)
        ret += t[i];
    return ret;
}
int n, q, state[N];
char str[N];
set<iii> S;
vector<iii> ask;
vector<int> coord[N], t[N];
void update_2d(int x, int l, int r, int k) {
    for(int i = x; i <= n; i += i & -i) {
        auto it = lower_bound(coord[i].begin(), coord[i].end(), l + 1);
        if(it == coord[i].begin()) update(t[i], 1, k);
 
 
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Compilation message (stderr)

street_lamps.cpp: In function 'void update(std::vector<int>&, int, int)':
street_lamps.cpp:10:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = x; i < t.size(); i += i & -i)
                    ~~^~~~~~~~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %s", &n, &q, str + 1);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:62:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf(" %s", T);
         ~~~~~^~~~~~~~~~
street_lamps.cpp:64:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &a);
             ~~~~~^~~~~~~~~~
street_lamps.cpp:67:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d %d", &a, &b);
             ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20