Submission #1370375

#	Time	Username	Problem	Language	Result	Execution time	Memory
1370375		pirmyratg	Passport (JOI23_passport)	C++20	0 / 100	1 ms	344 KiB

passport

#include "bits/stdc++.h"
using namespace std;

int main(){
    int n;
    scanf("%d", &n);
    vector<int> l(n+1), r(n+1);
    for(int i = 1; i <= n; ++i)
        scanf("%d%d", &l[i], &r[i]);
    int Q;
    scanf("%d", &Q);
    assert(Q==1);
    int x;
    scanf("%d", &x);
    assert(x==1);
    int now=r[x], id=1, answer=1;
    while(id<=n){
        // printf("%d %d\n", now, id);
        if(id>now){
            puts("-1");
            return 0;
        }
        answer++;
        int mx=now;
        for(int i = id; i <= now; ++i)
            mx=max(mx, r[i]);
        now=mx, id=now+1;
    }
    printf("%d\n", answer);
    return 0;
}

Compilation message (stderr)

passport.cpp: In function 'int main()':
passport.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
passport.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |         scanf("%d%d", &l[i], &r[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
passport.cpp:11:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     scanf("%d", &Q);
      |     ~~~~~^~~~~~~~~~
passport.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%d", &x);
      |     ~~~~~^~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46