#include <cstdio> #include <stdio.h> #include <iostream> #include <string> #include <stdint.h> #include <unordered_set> #include <algorithm> #include <vector> #include <functional> using namespace std; struct Number { int32_t iPos; }; struct Segment { int32_t iMinPos; int32_t iMaxPos; int32_t GetSize() const { return iMaxPos - iMinPos + 1; } void Init(int32_t iPos) { iMinPos = iPos; iMaxPos = iPos; } void Init(int32_t iPos0, int32_t iPos1) { iMinPos = min(iPos0, iPos1); iMaxPos = max(iPos0, iPos1); } void Extend(int32_t iPos) { if (iPos > iMaxPos) { iMaxPos = iPos; } if (iPos < iMinPos) { iMinPos = iPos; } } }; static int32_t iN; static int64_t iSolutionCnt; static Number aNums[1000002]; static void ReadData() { int32_t k; cin >> iN; for (int i = 0; i < iN; ++i) { cin >> k; aNums[k].iPos = i; } } static inline int32_t GetNumOfPossibilities(const Segment & sePotentialLocation, const Segment & sePositionsOfHigherNums, int32_t iSegmentSize) { int32_t x = sePotentialLocation.GetSize() - iSegmentSize + 1; int32_t y = iSegmentSize - sePositionsOfHigherNums.GetSize() + 1; return min(x, y); } static void SolveOdd() { int32_t iNum = iN; int32_t iSegmentRadius = 0; int32_t iSegmSize = 1; Segment sePositionsOfHigherNums, sePotentialLocation; sePositionsOfHigherNums.Init(aNums[iN].iPos); for (;;) { iSegmSize += 2; iSegmentRadius++; if (iSegmSize > iN) break; iNum--; int32_t iPos = aNums[iNum].iPos; sePositionsOfHigherNums.Extend(iPos); if (sePositionsOfHigherNums.GetSize() > iSegmSize) continue; sePotentialLocation.iMinPos = max(sePositionsOfHigherNums.iMaxPos - 2 * iSegmentRadius, 0); sePotentialLocation.iMaxPos = min(sePositionsOfHigherNums.iMinPos + 2 * iSegmentRadius, iN - 1); if (sePositionsOfHigherNums.iMaxPos <= sePotentialLocation.iMaxPos && sePositionsOfHigherNums.iMinPos >= sePotentialLocation.iMinPos) { iSolutionCnt += GetNumOfPossibilities(sePotentialLocation, sePositionsOfHigherNums, iSegmSize); } } } static void SolveEven() { if (iN < 2) return; int32_t iNum = iN - 1; int32_t iSegmentRadius = 0; int32_t iSegmSize = 2; Segment sePositionsOfHigherNums, sePotentialLocation; sePositionsOfHigherNums.Init(aNums[iN].iPos, aNums[iN - 1].iPos); if (sePositionsOfHigherNums.GetSize() == 2) { iSolutionCnt++; } for (;;) { iSegmSize += 2; iSegmentRadius++; if (iSegmSize > iN) break; iNum--; int32_t iPos = aNums[iNum].iPos; sePositionsOfHigherNums.Extend(iPos); if (sePositionsOfHigherNums.GetSize() > iSegmSize) continue; sePotentialLocation.iMinPos = max(sePositionsOfHigherNums.iMaxPos - 2 * iSegmentRadius - 1, 0); sePotentialLocation.iMaxPos = min(sePositionsOfHigherNums.iMinPos + 2 * iSegmentRadius + 1, iN - 1); if (sePositionsOfHigherNums.iMaxPos <= sePotentialLocation.iMaxPos && sePositionsOfHigherNums.iMinPos >= sePotentialLocation.iMinPos) { iSolutionCnt += GetNumOfPossibilities(sePotentialLocation, sePositionsOfHigherNums, iSegmSize); } } } int main(int argc, char * argv[]) { ReadData(); iSolutionCnt = 1; SolveOdd(); SolveEven(); cout << iN * 2 + 1 << " " << iSolutionCnt; 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | #include <cstdio> #include <stdio.h> #include <iostream> #include <string> #include <stdint.h> #include <unordered_set> #include <algorithm> #include <vector> #include <functional> using namespace std; struct Number { int32_t iPos; }; struct Segment { int32_t iMinPos; int32_t iMaxPos; int32_t GetSize() const { return iMaxPos - iMinPos + 1; } void Init(int32_t iPos) { iMinPos = iPos; iMaxPos = iPos; } void Init(int32_t iPos0, int32_t iPos1) { iMinPos = min(iPos0, iPos1); iMaxPos = max(iPos0, iPos1); } void Extend(int32_t iPos) { if (iPos > iMaxPos) { iMaxPos = iPos; } if (iPos < iMinPos) { iMinPos = iPos; } } }; static int32_t iN; static int64_t iSolutionCnt; static Number aNums[1000002]; static void ReadData() { int32_t k; cin >> iN; for (int i = 0; i < iN; ++i) { cin >> k; aNums[k].iPos = i; } } static inline int32_t GetNumOfPossibilities(const Segment & sePotentialLocation, const Segment & sePositionsOfHigherNums, int32_t iSegmentSize) { int32_t x = sePotentialLocation.GetSize() - iSegmentSize + 1; int32_t y = iSegmentSize - sePositionsOfHigherNums.GetSize() + 1; return min(x, y); } static void SolveOdd() { int32_t iNum = iN; int32_t iSegmentRadius = 0; int32_t iSegmSize = 1; Segment sePositionsOfHigherNums, sePotentialLocation; sePositionsOfHigherNums.Init(aNums[iN].iPos); for (;;) { iSegmSize += 2; iSegmentRadius++; if (iSegmSize > iN) break; iNum--; int32_t iPos = aNums[iNum].iPos; sePositionsOfHigherNums.Extend(iPos); if (sePositionsOfHigherNums.GetSize() > iSegmSize) continue; sePotentialLocation.iMinPos = max(sePositionsOfHigherNums.iMaxPos - 2 * iSegmentRadius, 0); sePotentialLocation.iMaxPos = min(sePositionsOfHigherNums.iMinPos + 2 * iSegmentRadius, iN - 1); if (sePositionsOfHigherNums.iMaxPos <= sePotentialLocation.iMaxPos && sePositionsOfHigherNums.iMinPos >= sePotentialLocation.iMinPos) { iSolutionCnt += GetNumOfPossibilities(sePotentialLocation, sePositionsOfHigherNums, iSegmSize); } } } static void SolveEven() { if (iN < 2) return; int32_t iNum = iN - 1; int32_t iSegmentRadius = 0; int32_t iSegmSize = 2; Segment sePositionsOfHigherNums, sePotentialLocation; sePositionsOfHigherNums.Init(aNums[iN].iPos, aNums[iN - 1].iPos); if (sePositionsOfHigherNums.GetSize() == 2) { iSolutionCnt++; } for (;;) { iSegmSize += 2; iSegmentRadius++; if (iSegmSize > iN) break; iNum--; int32_t iPos = aNums[iNum].iPos; sePositionsOfHigherNums.Extend(iPos); if (sePositionsOfHigherNums.GetSize() > iSegmSize) continue; sePotentialLocation.iMinPos = max(sePositionsOfHigherNums.iMaxPos - 2 * iSegmentRadius - 1, 0); sePotentialLocation.iMaxPos = min(sePositionsOfHigherNums.iMinPos + 2 * iSegmentRadius + 1, iN - 1); if (sePositionsOfHigherNums.iMaxPos <= sePotentialLocation.iMaxPos && sePositionsOfHigherNums.iMinPos >= sePotentialLocation.iMinPos) { iSolutionCnt += GetNumOfPossibilities(sePotentialLocation, sePositionsOfHigherNums, iSegmSize); } } } int main(int argc, char * argv[]) { ReadData(); iSolutionCnt = 1; SolveOdd(); SolveEven(); cout << iN * 2 + 1 << " " << iSolutionCnt; return 0; } |