Submission #120573

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
120573	2019-06-25 04:15:41	IOrtroiii	Street Lamps (APIO19_street_lamps)	C++14	100 / 100	2997 ms	105108 KiB

street_lamps

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#include <bits/stdc++.h>
using namespace std;
const int N = 300300;
int n, q;
char s[N];
int t[N << 2];
#define md ((l + r) >> 1)
void modify(int v, int l, int r, int p) {
   if (l == r) {
      t[v] ^= 1;
      return;
   }
   if (p <= md) modify(v << 1, l, md, p);
   else modify(v << 1 | 1, md + 1, r, p);
   t[v] = t[v << 1] + t[v << 1 | 1];
}
int lg[N], rg[N];
int findL(int v, int l, int r, int p) {
   if (l > p || t[v] == r - l + 1) {
      return -1;
   }
   if (l == r) return l;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

street_lamps.cpp: In function 'void add(int, int, int)':
street_lamps.cpp:95:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for (; yy < ft[x].size(); yy += yy & -yy) {
              ~~~^~~~~~~~~~~~~~
street_lamps.cpp: In function 'int main()':
street_lamps.cpp:118:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d %d %s", &n, &q, s + 1);
    ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:126:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%s", buf);
       ~~~~~^~~~~~~~~~~
street_lamps.cpp:128:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
          scanf("%d %d", lq + i, rq + i);
          ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
street_lamps.cpp:137:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
          scanf("%d", &p);
          ~~~~~^~~~~~~~~~

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