Submission #224024

#	Time	Username	Problem	Language	Result	Execution time	Memory
224024		cheeheng	Collecting Stamps 3 (JOI20_ho_t3)	C++14	0 / 100	5 ms	384 KiB

ho_t3

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

int X[205];
int T[205];

int main(){
    int N, L;
    scanf("%d%d", &N, &L);

    X[0] = 0;
    for(int i = 1; i <= N; i ++){
        scanf("%d", &X[i]);
    }
    X[N+1] = L;

    T[0] = 0;
    for(int i = 1; i <= N; i ++){
        scanf("%d", &T[i]);
    }
    T[N+1] = 0;

    // clockwise, then anticlockwise
    int ans = 0;
    for(int i = 0; i <= N; i ++){
        int temp = 0;

        long long t_taken = 0;
        for(int k = 1; k <= i; k ++){
            t_taken += X[k]-X[k-1];
            if(t_taken <= T[k]){
                temp ++;
            }
        }

        t_taken *= 2;
        for(int j = N; j >= i+1; j --){
            t_taken += X[j+1]-X[j];
            if(t_taken <= T[j]){
                temp ++;
            }
        }

        ans = max(temp, ans);
    }

    // anticlockwise, then clockwise
    for(int i = 0; i <= N; i ++){
        int temp = 0;

        long long t_taken = 0;
        for(int j = N; j >= i+1; j --){
            t_taken += X[j+1]-X[j];
            if(t_taken <= T[j]){
                temp ++;
            }
        }

        t_taken *= 2;

        for(int k = 1; k <= i; k ++){
            t_taken += X[k]-X[k-1];
            if(t_taken <= T[k]){
                temp ++;
            }
        }

        ans = max(temp, ans);
    }

    printf("%d", ans);

    return 0;
}

Compilation message (stderr)

ho_t3.cpp: In function 'int main()':
ho_t3.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &L);
     ~~~~~^~~~~~~~~~~~~~~~
ho_t3.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &X[i]);
         ~~~~~^~~~~~~~~~~~~
ho_t3.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &T[i]);
         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75