Submission #21834

#	Time	Username	Problem	Language	Result	Execution time	Memory
21834		mohammad_kilani	Boat (APIO16_boat)	C++14	9 / 100	2000 ms	524288 KiB

boat

#include <bits/stdc++.h>
using namespace std;
#define Mod 1000000007
int n;
int l[1000];
int r[1001];
vector<vector<int> > sum;

int main() {
    scanf("%d",&n);
    int ans = 0 ;
    sum.resize(n+1);
    for(int i=0;i<n;i++){
        scanf("%d%d",&l[i],&r[i]);
        for(int k=l[i];k<=r[i];k++){
            int cur = 1;
            for(int j=0;j<i;j++){
                if(k <= l[j])
                    continue;
                int num = min(r[j]+1,k) - l[j] - 1;
                cur+=sum[j][num];
                if(cur >= Mod)
                    cur-=Mod;

            }
            sum[i].push_back(cur);
            if(k != l[i])
                sum[i][k-l[i]]+=sum[i][k-l[i]-1];
            ans+=cur;
            if(ans >= Mod)
                ans-=Mod;
        }
    }
    printf("%d\n",ans);
    return 0;
}

Compilation message (stderr)

boat.cpp: In function 'int main()':
boat.cpp:10:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
boat.cpp:14:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&l[i],&r[i]);
                                  ^

• Subtask 1: 9 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42