Submission #77239

#	Time	Username	Problem	Language	Result	Execution time	Memory
77239		farukkastamonuda	Untitled (POI11_tem)	C++14	91 / 100	350 ms	33792 KiB

Main

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

int n, s[1000000], e[1000000], x[1000000], v[1000000], mn, c[1000000], ans, ds, de;

int main(){
    scanf("%d", &n);
    for(int i = 0; i < n; i++){
        scanf("%d%d", s + i, e + i);
    }
    ds = de = n;
    for(int i = 0;i < n;i++){
        int cmn = i;
        while(ds < de && s[x[ds]] < s[i]){
            cmn = min(cmn, v[x[ds]]);
            c[v[x[ds]]] = 0;
            ds++;
        }
        c[cmn] = 1;
        while(ds < de && s[x[de - 1]] > e[i]){
            de--;
            c[v[x[de]]] = 0;
            while(!c[mn]) mn++;
        }
        x[--ds] = i;
        v[i] = cmn;
        ans = max(ans, i - mn + 1);
    }
    printf("%d\n", ans);
}

Compilation message (stderr)

tem.cpp: In function 'int main()':
tem.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
tem.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", s + i, e + i);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 8 / 8
• Subtask 5: 8 / 8
• Subtask 6: 8 / 8
• Subtask 7: 8 / 8
• Subtask 8: 8 / 8
• Subtask 9: 9 / 9
• Subtask 10: 9 / 9
• Subtask 11: 9 / 9
• Subtask 12: 0 / 9