Submission #524247

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Source Code Expand

#include<cstdio>
#include<cstring>
#include<cctype>
#include<cmath>
#include<climits>
#include<algorithm>
#include<vector>
#include<valarray>
#include<string>
#include<set>
#include<map>
#include<stack>
#include<queue>
using namespace std;
  
  
#define rep(i,n) for(int i=0;i<n;i++)
#define REP(i,n) for(int i=1;i<=n;i++)
#define drep(i,n) for(int i=n-1;i>=0;i--)
#define DREP(i,n) for(int i=n;i>0;i--)
#define Rep(i,m,n) for(int i=m;i<n;i++)
#define scani(a) scanf("%d",&a)
#define scand(a) scanf("%lf",&a)
#define scans(s) scanf("%s",s)
#define readi(a) int a;scanf("%d",&a)
#define printi(a) printf("%d",a)
#define prints(s) printf("%s",s)
#define even(n) (((n)+1)%2)
#define odd(n) ((n)%2)
#define sg(x) ((x)?1:0)
#define LF printf("\n")
#define SPACE printf(" ")
#define pb push_back
#define mp make_pair
#define bs binary_search
#define all(a) (a).begin(),(a).end()
#define MOD 1000000007
  
typedef long long LL;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef pair<double,double> pdd;
typedef pair<int,int> pii;
  
const double pi=acos(-1.0);
double rad(double t){return t*pi/180.0;}
double deg(double d){return d*180.0/pi;}
int GCD(int x,int y){if(x<y)swap(x,y);return x%y?GCD(y,x%y):y;}
int LCM(int x,int y){return x/GCD(x,y)*y;}

int main(){
  readi(n);readi(m);
  int num[300009]={},ans=0;
  int s[100009],t[100009];
  REP(i,m){
    scanf("%d%d",&s[i],&t[i]);
    num[s[i]]++;
    num[t[i]+1]--;
  }
  //ruisekiwa
  REP(i,n+1)num[i]+=num[i-1];
  //vector wo tsukuru
  vi ng;
  REP(i,n)if(num[i]==1)ng.pb(i);
  //check
  REP(i,n)// printf("%d ",num[i]),
    num[i]=0;
  REP(i,m)if(lower_bound(all(ng),s[i])==upper_bound(all(ng),t[i])){
    num[i]=1;
    ans++;
  }
  printf("%d\n",ans);
  REP(i,m)if(num[i])printf("%d\n",i);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:52:11: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   readi(n);readi(m);
           ^
./Main.cpp:52:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   readi(n);readi(m);
                    ^
./Main.cpp:56:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&s[i],&t[i]);
                              ^

Judge Result