Submission #1518627

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Source Code Expand

#include <iostream>
#include <stdio.h>
#include <algorithm>
#include <queue>
#include <vector>
#include <stack>
#include <cmath>
#include <memory.h>
#include <iomanip>
using namespace std;

#define maxn 302
#define FOR(i, l, r) for (int i=l; i<=r; ++i)
#define FORD(i, r, l) for (int i=r; i>=l; --i)
#define REP(i, r) for (int i=0; i<(int)r; ++i)
#define REPD(i, r) for (int i=(int)r-1; i>=0; --i)
#define fi first
#define se second
#define mk make_pair
#define nil NULL
#define y0 y902
#define y1 y232
#define x0 x92
#define x1 x899
#define next asdfa
#define sz size
#define Debug(X) {cerr << #X << " = " << X << '\n';}
#define PR(A, n) {cerr << #A << " = "; FOR(i, 1, n) cerr << A[i] << ' '; cerr << '\n';}
#define PR0(A, n) {cerr << #A << " = "; REP(i, n) cerr << A[i] << ' '; cerr << '\n';}
typedef long long ll;
typedef double db;
typedef pair<db, db> dd;
typedef pair<int, int> ii;
typedef vector<int> vi;
const int inf = 1e9;
const ll MOD = 1000000007;
template<class T> int getbit(T x, int pos) {return (x>>(pos-1)) & 1;}
template<class T> void turn_on(T &x, int pos) {x = x | ((T)1<<(pos-1));}
template<class T> void turn_off(T &x, int pos) {x = x & ~((T)1<<(pos-1));}
template<class T> T sqr(T a) {return a*a;}

int n, m;
ll f[maxn][maxn][maxn];
vector<ii> R[maxn];

bool check(int i, int x, int y, int z) {
    REP(j, R[i].sz()) {
        int l = R[i][j].fi, T = R[i][j].se, cnt = 0;
        if (x>=l) ++cnt;
        if (y>=l) ++cnt;
        if (z>=l) ++cnt;
        if (cnt<T) return false;
    }
    return true;
}

ll dp(int x, int y, int z) {
    if (f[x][y][z]>-1) return f[x][y][z];
    int i = max(max(x, y), z);
    if (i==n) return check(i, x, y, z);
    if (!check(i, x, y, z)) return f[x][y][z] = 0;
    return f[x][y][z] = (dp(i+1, y, z) + dp(x, i+1, z) + dp(x, y, i+1))%MOD;
}

int main() {
    //freopen("rbg.inp", "r", stdin);
    //freopen("", "w", stdout);
    //ios::sync_with_stdio(0); cin.tie(0);
    scanf("%d%d", &n, &m);
    memset(f, -1, sizeof(f));
    while (m--) {
        int l, r, x; scanf("%d%d%d", &l, &r, &x);
        R[r].push_back(ii(l, x));
    }
    //Debug(dp(0, 0, 1));
    //cout << (dp(0, 0, 1) + dp(0, 1, 0) + dp(1, 0, 0))%MOD;
    cout << dp(0, 0, 1)*3%MOD;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:69:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
                          ^
./Main.cpp:72:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         int l, r, x; scanf("%d%d%d", &l, &r, &x);
                                                 ^

Judge Result