Submission #1383180

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Source Code Expand

#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
#define REP(i, n) for(int i = 0; i < (int)(n); ++i)
#define FOR(i, c) for(__typeof((c).begin()) i = (c).begin(); i != (c).end(); ++i)
typedef long long ll;

template<typename T>
struct BIT {
  vector<T> data;
  BIT() {}
  BIT(int n) : data(n+1, 0) {}
  void init(int n) { data.assign(n+1, 0); }
  T sum(int ed) const {
    for(T res(0); ; ed &= ed-1) if(ed) res += data[ed]; else return res;
  }
  void add(int i, const T& x) {
    for(++i; i < (int)data.size(); i += i&-i) data[i] += x;
  }
};

BIT<int> bit(100000+5);

void go(int a, int b) {
  bit.add(0, 1);
  bit.add(b-a+1, -1);
  int c1 = b-a+1;
  int c2 = b+1;
  for(int i = 1; ; ++i) {
    int aa = (a+i-1)/i;
    int bb = b/i;
    if(aa > bb)
      continue;
    int lb = max(aa, c1+1);
    int ub = min(bb, c2-1);
    if(lb > ub)
      break;
    bit.add(lb-1, 1);
    bit.add(ub, -1);
    c2 = lb;
  }
}

int main(void) {
  int n, m;
  scanf("%d%d", &n, &m);
  REP(i, n) {
    int a, b;
    scanf("%d%d", &a, &b);
    go(a, b);
  }
  for(int i = 1; i <= m; ++i) {
    printf("%d\n", bit.sum(i));
  }
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:50:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &n, &m);
                        ^
./Main.cpp:53:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &a, &b);
                          ^

Judge Result