Submission #7025264

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
 
using namespace std;
 
#define LL long long
const int mod = 1e9 + 7;
LL dp[66][2][2],L, R; 
 
LL dfs(int x, bool Left, bool Right, bool zero) {
    if(x < 0) return 1; 
    if(dp[x][Left][Right] >= 0 && !zero) 
        return dp[x][Left][Right]; 
    LL ans = 0;
    int l = 0, r = 1; 
    if(Left) l = L >> x & 1; 
    if(Right) r = R >> x & 1; 
    for(int i = l ; i <= 1 ; i++) {
        for (int j = i ; j <= r ; j++) {
            if (j == 1 && zero) {
                if(i == 1) ans += dfs(x-1, Left && i == l, Right && j == r, zero && j == 0); 
            }
            else ans += dfs(x-1, Left && i == l, Right && j == r, zero && j == 0); 
        }
    }
    ans %= mod; 
    if(!zero) dp[x][Left][Right] = ans; 
    return ans; 
}
int main() {
    scanf("%lld%lld",  & L,  & R); 
    memset(dp, -1, sizeof(dp)); 
    printf("%lld \n", dfs(60, 1, 1, 1)); 
    //system("pause");
    return 0; 
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:33:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",  & L,  & R); 
                                  ^

Judge Result