#include "message.h" #include "kanapka.h" #include<climits> #include<iostream> #include<cstdio> #include<cstdlib> #include<cmath> #include<algorithm> #include<vector> #include<set> #include<map> #include<stack> #include<queue> #include<list> #include<string> #include<cstring> using namespace std; #define PB push_back #define MP make_pair #define F first #define S second #define ALL(x) (x).begin(),(x).end() #define SIZE(x) (int)(x).size() #define SORT(x) sort((x).begin(),(x).end()) #define CLEAR(tab) memset(tab, 0, sizeof(tab)) #define REP(x, n) for(int x = 0; x < (n); x++) #define FOR(x, b, e) for(int x = (b); x <= (e); x++) #define FORD(x, b, e) for(int x = (b); x >= (e); x--) #define VAR(v, n) __typeof(n) v = (n) #define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i) #define DEBUG(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__) const int MAX_BUF_SIZE = 16384; char BUFOR[MAX_BUF_SIZE]; int BUF_SIZE, BUF_POS; char ZZZ; #define GET(ZZZ){ZZZ='a';if(BUF_POS<BUF_SIZE)ZZZ=BUFOR[BUF_POS++];\ else if(!feof(stdin)){BUF_SIZE=fread(BUFOR,1,MAX_BUF_SIZE,stdin);\ ZZZ=BUFOR[0];BUF_POS=1;}} #define GI(WW){do{GET(ZZZ);}while(!isdigit(ZZZ));WW=ZZZ-'0';\ while(1){GET(ZZZ);if(!isdigit(ZZZ))break;WW=WW*10+(ZZZ-'0');}} #define GC(WW){do{GET(ZZZ);}while(!isalpha(ZZZ));WW=ZZZ;} //FAST IO typedef long long int LL; typedef pair<LL,LL> PII; typedef vector<LL> VI; const int MXN = 1000010; const int C = 262144; const LL INF = LLONG_MAX; const pair<PII, PII> kappa = MP(MP(INF, INF), MP(INF, INF) ); LL n; VI a; /* ( (pref, suf), (middle, sum) ) */ pair<PII, PII> solve(pair<int, int> x) { int pocz = x.F; int kon = x.S; if(pocz > kon) return MP(MP(INF, INF), MP(INF, INF) ); LL mini, maksi; mini = maksi = GetTaste(pocz); LL sum = 0, mid = 0; LL tmp = 0; FOR(i, pocz, kon) { sum += GetTaste(i); mini = min(sum, mini); maksi = max(sum, maksi); if(tmp <= 0) tmp += GetTaste(i); else tmp = GetTaste(i); mid = min(mid, tmp); } return MP(MP(mini, sum - maksi), MP(mid, sum) ); } LL solve2(vector< pair<PII, PII> > vec) { LL res = 0; LL totalSum = 0; FOREACH(it, vec) totalSum += (*it).S.S; FOREACH(it, vec) res = max(totalSum - (*it).S.F, res); int S = SIZE(vec); FOR(i, 0, S - 1) FOR(j, i + 1, S - 1) { LL tmp = vec[i].F.S + vec[j].F.F; FOR(o, i + 1, j - 1) tmp += vec[o].S.S; res = max(totalSum - tmp, res); } return res; } pair<int, int> getVec(int x) { int pocz = (x * n) / NumberOfNodes(); int kon = ((x + 1) * n ) / NumberOfNodes(); if(MyNodeId() == NumberOfNodes() - 1) kon = n; return MP(pocz, kon - 1); } void sendData(pair<PII, PII> tmp) { PutLL(0, tmp.F.F); PutLL(0, tmp.F.S); PutLL(0, tmp.S.F); PutLL(0, tmp.S.S); Send(0); } pair<PII, PII> getData(int id) { Receive(id); LL a1, a2, a3, a4; a1 = GetLL(id); a2 = GetLL(id); a3 = GetLL(id); a4 = GetLL(id); return MP(MP(a1, a2), MP(a3, a4) ); } int main() { n = GetN(); pair<PII, PII> tmp; tmp = solve(getVec(MyNodeId() ) ); sendData(tmp); if(MyNodeId() == 0) { vector< pair<PII, PII> >vec; FOR(i, 0, NumberOfNodes() - 1) { pair<PII, PII> q = getData(i); if(q != kappa) vec.PB(q); } printf("%lld\n", solve2(vec) ); } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | #include "message.h" #include "kanapka.h" #include<climits> #include<iostream> #include<cstdio> #include<cstdlib> #include<cmath> #include<algorithm> #include<vector> #include<set> #include<map> #include<stack> #include<queue> #include<list> #include<string> #include<cstring> using namespace std; #define PB push_back #define MP make_pair #define F first #define S second #define ALL(x) (x).begin(),(x).end() #define SIZE(x) (int)(x).size() #define SORT(x) sort((x).begin(),(x).end()) #define CLEAR(tab) memset(tab, 0, sizeof(tab)) #define REP(x, n) for(int x = 0; x < (n); x++) #define FOR(x, b, e) for(int x = (b); x <= (e); x++) #define FORD(x, b, e) for(int x = (b); x >= (e); x--) #define VAR(v, n) __typeof(n) v = (n) #define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i) #define DEBUG(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__) const int MAX_BUF_SIZE = 16384; char BUFOR[MAX_BUF_SIZE]; int BUF_SIZE, BUF_POS; char ZZZ; #define GET(ZZZ){ZZZ='a';if(BUF_POS<BUF_SIZE)ZZZ=BUFOR[BUF_POS++];\ else if(!feof(stdin)){BUF_SIZE=fread(BUFOR,1,MAX_BUF_SIZE,stdin);\ ZZZ=BUFOR[0];BUF_POS=1;}} #define GI(WW){do{GET(ZZZ);}while(!isdigit(ZZZ));WW=ZZZ-'0';\ while(1){GET(ZZZ);if(!isdigit(ZZZ))break;WW=WW*10+(ZZZ-'0');}} #define GC(WW){do{GET(ZZZ);}while(!isalpha(ZZZ));WW=ZZZ;} //FAST IO typedef long long int LL; typedef pair<LL,LL> PII; typedef vector<LL> VI; const int MXN = 1000010; const int C = 262144; const LL INF = LLONG_MAX; const pair<PII, PII> kappa = MP(MP(INF, INF), MP(INF, INF) ); LL n; VI a; /* ( (pref, suf), (middle, sum) ) */ pair<PII, PII> solve(pair<int, int> x) { int pocz = x.F; int kon = x.S; if(pocz > kon) return MP(MP(INF, INF), MP(INF, INF) ); LL mini, maksi; mini = maksi = GetTaste(pocz); LL sum = 0, mid = 0; LL tmp = 0; FOR(i, pocz, kon) { sum += GetTaste(i); mini = min(sum, mini); maksi = max(sum, maksi); if(tmp <= 0) tmp += GetTaste(i); else tmp = GetTaste(i); mid = min(mid, tmp); } return MP(MP(mini, sum - maksi), MP(mid, sum) ); } LL solve2(vector< pair<PII, PII> > vec) { LL res = 0; LL totalSum = 0; FOREACH(it, vec) totalSum += (*it).S.S; FOREACH(it, vec) res = max(totalSum - (*it).S.F, res); int S = SIZE(vec); FOR(i, 0, S - 1) FOR(j, i + 1, S - 1) { LL tmp = vec[i].F.S + vec[j].F.F; FOR(o, i + 1, j - 1) tmp += vec[o].S.S; res = max(totalSum - tmp, res); } return res; } pair<int, int> getVec(int x) { int pocz = (x * n) / NumberOfNodes(); int kon = ((x + 1) * n ) / NumberOfNodes(); if(MyNodeId() == NumberOfNodes() - 1) kon = n; return MP(pocz, kon - 1); } void sendData(pair<PII, PII> tmp) { PutLL(0, tmp.F.F); PutLL(0, tmp.F.S); PutLL(0, tmp.S.F); PutLL(0, tmp.S.S); Send(0); } pair<PII, PII> getData(int id) { Receive(id); LL a1, a2, a3, a4; a1 = GetLL(id); a2 = GetLL(id); a3 = GetLL(id); a4 = GetLL(id); return MP(MP(a1, a2), MP(a3, a4) ); } int main() { n = GetN(); pair<PII, PII> tmp; tmp = solve(getVec(MyNodeId() ) ); sendData(tmp); if(MyNodeId() == 0) { vector< pair<PII, PII> >vec; FOR(i, 0, NumberOfNodes() - 1) { pair<PII, PII> q = getData(i); if(q != kappa) vec.PB(q); } printf("%lld\n", solve2(vec) ); } return 0; } |