Submission #1103938

#	Time	Username	Problem	Language	Result	Execution time	Memory
1103938		modwwe	Tug of War (BOI15_tug)	C++17	0 / 100	280 ms	4432 KiB

tug

#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC optimize("conserve-stack")
#include<bits/stdc++.h>
//#define int long long
#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".out","w",stdout)
#define pb push_back
#define mask(i) (1<<i)
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
#define getchar_unlocked getchar

inline int scan()
{
    char c = getchar_unlocked();
    int x = 0;
    while (c < '0' || c > '9')
    {
        c = getchar_unlocked();
    }
    while (c >= '0' && c <= '9')
    {
        x = (x << 1) + (x << 3) + c - '0';
        c = getchar_unlocked();
    }
    return x;
};
void phongbeo();
const int inf = 1e18;
const int mod2 = 1e9 + 7;
const int  mod1 = 998244353;
int add(int x,int y)
{
    if(x+y>=mod2) x-=mod2;
    return x+y;
}
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a, b, c, d;
};
struct ie
{
    int a, b, c, d, e;

};

ll n, m, s1, s2, s4, s3, sf, k, s5, s6, mx, s7, s8, s9, mx2, res, dem2 = 0, dem = 0, s33, dem3, dem4, mid, l2, r2, center;
int  i, s10, s12,k1,k2,k3,s11,limit,w,l,r,last,root;
int kk;
int el = 19;

main()
{
    if(fopen(task".inp","r"))
    {
        fin(task);
        fou(task);
    }
    NHP
    /// cin>>s1;
///modwwe
    phongbeo();
    // checktime
}
vector<int> v[60001];
bool d[60001];
bitset<600010>dp,dp2;
ic c[60001];
ib b[60001];
void dfs(int x,bool a,int y)
{
     if(d[x])
     {
            b[++dem2]= {s3,s4-s3};
            return;
     }
    d[x]=1;
    if(!a)
        s3+=c[x].c;
    s4+=c[x].c;

    if(!a)s2=c[x].b;
    else s2=c[x].a;
    for(auto f:v[s2])
        if(f!=x)
            dfs(f,1-a,y);
}
void phongbeo()
{
    cin>>n>>m;
    for(int i=1; i<=n*2; i++)
    {
        cin>>l>>r>>s2;
        c[i]= {l,r+n,s2};
        v[r+n].pb(i);
        v[l].pb(i);
        s5+=s2;
    }
    for(int i=1; i<=n*2; i++)
        if(!d[i])
        {
            dfs(i,0,c[i].a);
            s3=0;
            s4=0;
        }
    dp.set(0);
    for(int i=1; i<=dem2; i++)
    {
        dp2=(dp<<b[i].a);
        dp=(dp<<b[i].b);
        dp=(dp|dp2);
    }
    for(int i=0;i<=600000;i++)
       if(dp[i]&&abs(i*2-s5)<=m){
         cout<<"YES";
         exit(0);}
        cout<<"NO";
}

Compilation message (stderr)

tug.cpp:37:17: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   37 | const int inf = 1e18;
      |                 ^~~~
tug.cpp:70:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   70 | main()
      | ^~~~
tug.cpp: In function 'void dfs(int, bool, int)':
tug.cpp:92:25: warning: narrowing conversion of 's3' from 'long long int' to 'int' [-Wnarrowing]
   92 |             b[++dem2]= {s3,s4-s3};
      |                         ^~
tug.cpp:92:30: warning: narrowing conversion of '(s4 - s3)' from 'long long int' to 'int' [-Wnarrowing]
   92 |             b[++dem2]= {s3,s4-s3};
      |                            ~~^~~
tug.cpp: In function 'void phongbeo()':
tug.cpp:112:19: warning: narrowing conversion of '(((long long int)r) + n)' from 'long long int' to 'int' [-Wnarrowing]
  112 |         c[i]= {l,r+n,s2};
      |                  ~^~
tug.cpp:112:22: warning: narrowing conversion of 's2' from 'long long int' to 'int' [-Wnarrowing]
  112 |         c[i]= {l,r+n,s2};
      |                      ^~
tug.cpp: In function 'int main()':
tug.cpp:13:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 | #define fin(x) freopen(x".inp","r",stdin)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
tug.cpp:74:9: note: in expansion of macro 'fin'
   74 |         fin(task);
      |         ^~~
tug.cpp:14:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 | #define fou(x) freopen(x".out","w",stdout)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
tug.cpp:75:9: note: in expansion of macro 'fou'
   75 |         fou(task);
      |         ^~~

• Subtask 1: 0 / 18
• Subtask 2: 0 / 30
• Subtask 3: 0 / 23
• Subtask 4: 0 / 29